Garage Bay 3D printer for large objects

Is anybody making a 3D printer that is made to fit in a single bay of a garage? Like something the size of a large SUV? Gigabot comes close, but it still smaller. For such a device, I'd like to make a modular head with a lot of potential interchangeable heads: 1. All the typical FDM 2. Milling for CNC type operation. 3. Laser for cutting 4. MIG welding head 5. Arm with gripper for auto-assembly 6. Scanner head 7. FDM using atypical materials, such as dry slurry epoxy (with microspheres or flocked cotton) Combine this with mobile robot arms to manage work pieces, and you're coming close to a complete fab lab.

Topic by GarrettH2 4 years ago  |  last reply 4 years ago


3D Scanning a Locomotive

I know nothing about 3D scanning so hope to find suggestions here. I have a large object I wish to scan and import into Rhino 3D and eventually cut (1:120 scale) on my tabletop CNC mill. The diesel locomotive upper nose has compound curves in its shape. The red rectangles in the illustration mark the area of the locomotive that is difficult to reproduce accurately in a drawing. It is this area I would like to scan. Is there a scanning system somewhere in instructables that is capable of scanning this large area of the diesel locomotive? If so, please point me to it. Thanks much.

Topic by CyValley 3 years ago  |  last reply 3 years ago


I am trying to cast a large "sawdust" object?

I am attempting to create large molds/casts of trash bags. the goal is to create a life-size trash bag made of sawdust. I'm not even sure where to begin. i'm not sure if i could create a mold of a bag somehow or if i could fill a bag and go from there. i know wood glue won't dry in a large mass, so i'm not sure what materials i should use. 

Question by ChristieS35 1 year ago  |  last reply 1 year ago


Need a cheap way to make a mold of a fairly large object Answered

I've never made a mold of anything before, but I have a statue that I would like to make a replica of. The statue is about 18 inches tall, 5 to 6 inches wide at its widest and 6 inches deep at its deepest. It also sits on a 2 inch high 10x12 base, but I don't really need to cast the base, I could fabricate a new one very easily. I read the featured instructable for making silicon molds and it was very useful, but I think silicon would be very expensive for this big an object. At least 3 gallons, I'm thinking. That would run at least 300-500 dollars, and I'm looking to spend more like 50-75. Is there another technique, or another material I could use? My sculpture I think is cast from resin, and I'm fairly sure it's at least partially hollow. It's not intricately detailed, but it's hand painted, so I don't want to use anything that will damage it. Could plaster work? Rubber? Cheaper kinds of silicon? What sort of material would be best to cast the replica out of once the mold is done? I'm open to any kind of material, in fact I'll probably try a few different ones. Plaster, resin, maybe plastic or even rubber if that won't harm the mold.

Question by UselessTrivia 9 years ago  |  last reply 1 year ago


How can I build a large Pentagraph for objects over 72 inches?

Question by surettphil 8 years ago  |  last reply 8 years ago


large multi-butterfly projection to follow you

Can anyone create a projection of white digital butterflies that follow the ball you hold? so you could walk through and a ton of butterflies would just follow that ball you are carrying. project on several different silk screens so you're phsically walking through and feeling all these objects touch your face?

Question by rebeccatesiapark 7 years ago  |  last reply 7 years ago


How do I tri-color a large volume of small objects?

I have a thousand small plastic items (white) that I need to color red white and blue.  They will be for sale so I may need to repeat this process multiple times.  Painting would be very time-consuming, so I'm hoping there's another process.  Any ideas?  

Question by Pyanochick 2 years ago  |  last reply 2 years ago


illustrator to large dgx file question? Answered

Hello. I'm in a bit of a hurry as there is a competition I want to enter by Friday but I just need to know before doing so if this is possible in theory. ( I only have to enter the image on Friday not the the object) My final aim is to have an intricate image laser cut into  metal sheet  (5' x 7'.) at a metal fabricator's. I have imported an A4 sized single colour tif. file into Illustrator and have converted it to a vector using Livetrace; it is now an ai. file. This as far as I have got  . But the question is ;  I plan to use one of the available convertors to change this ai. file to a dgx. file. Do I simply then take that to a fabricator and then that's it ? Have I missed out a hundred steps and complications ? Or is there a better way ? Or is it not possible to scale up  an image this way? It's obvious that I don't know what I'm doing so any advice will be appreciated. Thanks FOH

Question by FriendOfHumanity 3 years ago  |  last reply 3 years ago


How to make a large electromagnetic levitation device

I found this instructable on making the magnetic air bonsai plant but id like to make one that lifts much larger objects maybe up to 500lbs... I understand how it works in principal but i don't have the knowhow in order to go out and purchase the right components. Here is the link to the first one https://www.instructables.com/id/Arduino-Air-Bonsai-Levitation/

Question by SDRR 6 months ago


Electroplate tech used for 3D printing

Obviously it wouldn't work for large scale objects, but could high current, localized "plating" be used to deposit large, controlled amounts of metal to sculpt an object??

Topic by NumbersAndLetters 7 years ago  |  last reply 7 years ago


how do i embed an object in a large transparent block (think jeff koons or damien hirst)?

Hi there, if i want to embed an object (say a pair of sneakers or a football) in a square transparent block using a material that i could pour into a mold as a liquid and which would cure relatively slowly as to let a bottom layer begin to dry as one puts the object in so that it won't sink to the bottom, what would be the best option for doing this AND the most cost effective if i wanted to do larger projects? originally, i assumed that fiberglass resin was the only option, but it's VERY expensive ($60+ per cubic foot... or so) and i'm hoping that there may be a more cost effective, easy to use material. thanks in advance, Jeremiah

Question by jeremiah1223 8 years ago  |  last reply 8 years ago


Container explodes after being shot with rifle? What mixture?

I saw this on tv. The guy was putting a mixture in a variety of objects, then backing away up to what a ppeared to be a hundred yards and shooting the container with a high velocity rifle. The explosion was large depending on how much was used. What was the mixture?

Question by 10 years ago  |  last reply 4 years ago


Blender modelling question? Answered

Hello, I have two objects on the screen. When I select one and press G, a large circle appears which alters both objects when I grab; this has not happened before. I know that I must have pressed a shortcut by mistake but I cannot seem to find an answer on the Googles. I've even gone through the process of pressing each key. Could someone tell me how to return to normal.  Thanks EDIT; When I say normal , I mean, I need to get the Grab cursor back to normal( at the moment when I try to use it, it is a big circle, that effects everything it touches, rather than just the object that i want to move).

Question by FriendOfHumanity 2 years ago  |  last reply 2 years ago


I want to make a levitating coffee table (or some kind of large object) using electromagnets. I need help with a design.

 i want to make so that i can adjust the hight by changing how much electricity is being outputted. could someone help? this is for a science fair project sooooo yeah.

Question by HANKS965 9 years ago  |  last reply 9 years ago


electronic magnet that produces enough force to lift weight

you have an unlimited power source. now is it possible to create enough force at the right "degree" that would be repelled by the earth instead of attracted.. so like a floating magnet. but its strong enough to lift large objects..... like maybe a human?

Question by fireball9919 7 years ago  |  last reply 7 years ago


old idea new twist,want to build a programmable music box can't figure out the hinge circuit

I'm converting a chest into a large music box i need to find a way to have a specific song downloaded to a chip or maybe a old cellphone i thought ,then set up to play when the box opens.I'd really like to know the name of the circuit that works on the principles of two objects separating to complete the circuit. Thanks to anyone who tries

Question by 9 years ago  |  last reply 9 years ago


How would I make a sensor sense motion coming at me from behind while I'm moving forward?

I'm trying to make a small sensor that would detect a large object coming at me from behind at about 60mph while I'm moving forward at around 7mph. What kind of sensor would I use? I looked up the different types and I found Passive/active infrared, optic-based, piezoelectric, and ultrasonic. I tried to figure it out myself and my best guess is ultrasonic? Like what cars use to detect deer, they use "ultrasonic airflow sensors". Ideally the sensor would beep and get louder or faster as the object approaches. Would I use an arduino? I'm very new at this :/ Thanks for any help!

Topic by arrowstation 3 years ago  |  last reply 3 years ago


Looking for someone in NYC who is savvy with electronics & physical construction for a window display project

Help Remedies has envisioned three window displays at a prominent beauty and health chain retailer in NYC. We're looking for someone to realize the ideas into physical window installations including sourcing the materials, building the various components, and installing the elements. The three different displays contain the following elements: 1. an interactive window wherein passersby initiate the activity by pressing a sensor on the window. This activates two small objects to release from the ceiling and fall into a receptacle. 2. two monitors or displays of some sort (could be a projection) which display two Facebook pages with live updating. 3. a large-scale printout with attractively merchandised objects. This is a contract/short-term freelance opportunity. Applicants should have relevant experience in electronics and physical construction. Email melinda@helpineedhelp.com if interested. Thank you.

Question by MelindaHelp 7 years ago  |  last reply 7 years ago


Quiet Hovercraft?

Long-time lurker, first-time poster. I very much enjoy this community of happily-twisted imagineers & feel strangely at home when I visit. Been toying with an idea & need some outside-the-box thinkers. One primary issue with recreational hovercraft design is propellor noise. Could a blade-free ("Dyson-ring") fan design be adapted to a hovercraft application? By ducting the required volume & pressure of air into the ring the primary source of noise is...gone. Safety would be vastly improved, eliminating the need (and weight) for protective screening. Fewer mechanical parts also means the craft becomes cheaper/lighter.  And if, rather than one large ring, two smaller rings were swivel-mounted they could further simplify the steering (directional thrust) and give the hovercraft another very unique feature. By quickly counter-reversing the two rings 180 degrees, the hovercraft would have BRAKES! I've never seen a recreational hovercraft with the ability to stop quickly (with the obvious exception of crashing into a large, heavy object!). All input is appreciated. Thanks very much!       

Topic by Ghost Tracker 7 years ago  |  last reply 7 years ago


Stepper motors, plotters, millers and Arduino??? How does it work!?

So I would love to have a little help here understanding how these arduino drawing, milling, and plotting contraptions work. So I know that the stepper motor is for precision, but when you hook it up to gears and stuff, how does arduino know where the stepper motor is if its like on a track or gear? Say you have a stepper motor connected to a corkscrew gear. Some corkscrew gears may be large and others may be small. How does Arduino know where the motor is on that plane?? How do you import pictures or 3D objects to Arduino to make it draw/plot/mill? Thanks!

Topic by HavocRC 6 years ago  |  last reply 6 years ago


Calculating Drag When Firing Potato Launcher and Design Specifications

I'm interested in making a pneumatic potato launcher, I've found plenty information on that but I want to hit a target 255 meters away at an angle of 45 degrees. I calculated that I would need an initial velocity of approximately 50 m/s without wind resistance. The object being launched is an average sized potato under normal weather conditions. With wind resistance, what initial velocity will be required to hit the target? Please explain the process by which you came to the answer so that I may use the same method in future endeavors with different angles and distances. Also, just how much pressure would be required to launch a potato and achieve that speed, and to what specifications would the launcher need to be built i.e. how large the gas chamber will need to be, length of barrel, etc...

Topic by mike714 9 years ago  |  last reply 9 years ago


Suggested Project/Instructable: Holo Display

Hello all, I had an idea a moment ago for a "holographic" display but I realise that I do not currently have the supplies necessary to complete it. It is actually a combination of a couple other peoples ideas to form a new concept. Someone on here, (open new tab>search) NK5, made an instructable on how to make a kind of hologram. Another cool frood, Johny Chung Lee, came up with and did some basic programming for a different kind of simulated hologram and a multitouch system. And lastly there was a group that made a pair of specialised LED gloves to go with the multitouch system. My thought was: make a reflection hologram and use the Wiimote multitouch system to make it interactive. Project the screen onto the floor or put a large screen tv on the floor (if you want to risk it. and place the glass over it at 45 like with NK5's idea. Put the wiimote at the base of the glass. (it would be simpler if it were behind the glass but I think glass disables IR cameras) Then put on the IR gloves and run it all together with a program that supports the multitouch. Once you got the hang of it it would be more or less a "Minority Report" type display. Well, that's it. I can't make this because I do not have a projector or a pane of glass anywhere near large enough. Nor do I have sufficient expandable cash to purchase such objects. Good luck.

Topic by finfan7 10 years ago


World's youngest inventor - holds patent for new broom.

A boy of five is thought to be the UK's youngest person to patent an invention after coming up with a labour-saving broom to help his father sweep leaves.Sam Houghton, of Buxton, Derbyshire, was just three when he came up with a double-headed broom to collect large debris and fine dust simultaneously. Sam, who was inspired by animated inventors Wallace and Gromit and Archie the Inventor from TV series Balamory, said: "I saw my Daddy brushing up and made it. There are two brushes because one gets the big bits and one gets the little bits left behind."I don't know if I want to be an inventor when I grow up but this was fun.""I was swapping from one broom to the other and he asked why. When I said it was to pick up the different leaves and twigs it must have got him thinking."He got a large elastic band from the shed and put it over the two brooms, holding them just the right way to use both together. He then called me and announced that had had made up an invention." The broom works with the coarser brush at the front to pick up larger objects and the finer brush at the back.Sam's invention has been taken up by the UK-IPO, which is hoping to use it to encourage other youngsters to come up with inventions through an initiative called "Cracking Ideas".BBC StoryCracking Ideas websiteIntellectual Property Office

Topic by Kiteman 11 years ago  |  last reply 7 years ago


New Channel for Educators - a call for projects

To the teachers, educators, instructors, advisers, Scout leaders, home-schoolers, unschoolers, and regular folks who just really want to help out a teacher.... I'd like to present to you the new, never-before-seen channel exclusively for educational content! That's right. We're trying to put everything all in one place to make the site easier to sift through as an educator. Need a project to accompany a unit on covalent bonds? What about an activity to teach kindergarteners to share? Hands-on projects are awesome teaching tools, and it's about time for those projects to live in one place. It's a mostly-empty channel at this point with only a handful of guides in it (and select few projects that I unilaterally recategorized because they were too perfect not to include), but it'd be nice to grow it into a large enough section of the site that it becomes actually useful to teachers. If you don't mind spending a little extra time on the site, I'd really appreciate it if you could recategorize some of your explicitly academic content into the new Education channel within the Living category. We're trying to load this new channel with materials that include the following: subject areas for the project, recommended age ranges, and the learning objective(s) for the project or guide. We'll be running a contest for teachers starting in December, giving away class sets of Instructables pro memberships along with the usual fare of Apple products and Amazon certificates. The MOST IMPORTANT elements of anything placed into this new channel are as follows: subject area age range learning objective If you want to recategorize any projects you've done that are specifically for teachers, you may. What would be most helpful is to create a guide of useful projects that is tied to a specific learning objective. Check out what the Children's Museum of Houston did for an example of what we're looking for in this channel. Checking for understanding: 1- What are the three most important ingredients for a project added to the Education channel? 2- What category is the Education channel in? Extra Credit- Do you have to be a teacher to enter a project or guide into the new channel? Extra Extra Credit- What are the three most important components of a project entered into the Education channel?

Topic by wilgubeast 7 years ago  |  last reply 1 year ago


What is the hardest titanium alloy i can smelt myself? Answered

Hi, Recently ive been looking into titanium alloying, i have access to a large amount of chemically pure titanium scrap, and want to alloy it into the hardest possible alloy i can, so i can build some very tiny yet strong mechanical objects as well as a titanium knife. the means by which i wish to produce the alloy is with an induction furnace My problem is, ive google searched, but cant find what the hardest suitable titanium alloy is, previously i thought titanium steel was hardest, but then i learnt that titanium aluminium is the best. Everywhere indirect terms are used like "best" and "most " and often they only talk about pure titanium vs steel alloys. Im really confused. I just want to know what the hardest titanium alloy is. What is the best titanium alloy i should make for use as a blade and for high strength structuring, e.g frame body for small robot i want to make as indestructable as possible. thanks

Question by oldmanbeefjerky 6 years ago  |  last reply 6 years ago


Quick Release Piston Blowback?

I have put a great deal of money into constructing a 6" air launcher, but to my dismay things didn't quite go as planned with the valve design.  I have attached a picture below of the valve's design.  The idea is that when the air is released from behind the piston, the piston should move back allowing air to exit through the 5" pipe.  The valve successfully holds pressure, but fails to fly back and I believe this is a result of the piston and barrel it is up against being equal in size.  I wouldn't have designed this in this way, but the large schedule 80 pvc tee only allows 1/4 inch around the sides of the piston at best.  I am curious if anyone has any ideas to make this piston valve work, I really don't want to pay 200 dollars to get a butterfly valve on it and would greatly appreciate any ideas that may make this work.  I promise videos of the beast once I get it up and running.  Launching 6" objects using up to 80psi will be a blast, literally if I ever get crazy enough to bring it up that high.  

Question by jj.inc 5 years ago  |  last reply 5 years ago


ZVS Induction Heater help?

Hi, I tried to build a ZVS induction heater using this circuit http://img413.imageshack.us/img413/5136/inductionm.jpg , but I had no sucess. The work coil is 10+10 turns of 22 AWG wire around an old highlighter casing, and I am powering the circuit from a working 12 volt 7ah battery. The circuit works with my flyback transformer, but does not work on the induction heater. I am using all of the standard components in the flyback circuit, but I replaced the 5+5 turn primary with a 10+10 work coil. As far as I mesured with my thermometer the temperature of the object never increases over 1 degree (I am trying to heat copper wire or a small picture nail). Does anyone have some suggestions? Edit: Sorry about the delay, but I was able to heat a large paper clip using 8+8 turns of 16 AWG wire wrapped around a glass test tube. This time I used a huge 24 volt center tap 18 amp transformer to get 12 volts.

Question by TimTD 8 years ago  |  last reply 6 years ago


Can you read it?

I've been meaning to show you this for a while, but I finally took some photos when I went to visit my parents. It's a clock. Really, it is. The arm rotates once per hour. The ball on the end is a camera, pointing at the ground. To tell the time, you walk around the clock to find out what hour is circled at the base of the arm, then look through one of the small round windows on the large sphere to see a TV that shows what the camera sees. The minutes are only marked every ten minutes, and in between those times the camera looks at featureless ground and confused people trying to see the time by looking up at the camera. On the hour, the arm raises in the air, and the camera has a look at the shop roofs, which are as ugly as commercial roofs the world over, and the speakers next to the benches (when they're working) make an odd fog-horn sort of noise. It's a bizarre, unfunctional object, in too small a space. Maybe if it was in a wide open square it would work as public interactive art, but here, wedged in a corner of a town with high unemployment it's a criminal waste of money.

Topic by Kiteman 10 years ago  |  last reply 10 years ago


Insanely Cool Multitouch

So now all I need is $100k and I'm ready to rock. watch the videoJefferson Y. Han likes big computer monitors. If a screen is large enough, four or five people can work at it together, rearranging blueprints, say, or editing photos. But they can't do that if they're taking turns at a keyboard and mouse. The answer, which Han demonstrates on a 3 x 8-ft. monitor in his lab at New York University, is multitouch input. It allows any number of users to lay hands on the screen as if they were manipulating real objects. On the monitor, recently dubbed the Media Wall, Han uses his hands to spin a virtual globe and then zoom into the canyons of Manhattan. "A mouse is an indirect pointing device," Han says. "You're working with an object that's not on the screen. Multitouch computing is direct manipulation."Han, the son of Korean immigrants, drew inspiration from the way light diffuses when you touch a glass of water. It's a phenomenon known as "œfrustrated total internal reflection." Han attached LEDs to the side of a piece of clear acrylic ”his screen" and mounted an infrared camera on the back. Light traveled through the acrylic. When Han touched the screen, some light diffused out and was captured by the camera. He then designed software that allows the screen to be used for operating mapping programs, handling photos and drawing animated figures. Perceptive Pixel, the business Han started with an NYU colleague, builds custom multitouch computers for private industry and military clients (and, now, to anyone with $100,000).Multitouch computing isn't new: the concept has been kicking around since the 1980s, and two Breakthrough Award-winning products, Apple's iPhone and Microsoft's Surface, use versions of it. Han's special contribution: Beyond his varied applications for multitouch computing lies a broad vision of how it can empower people to work together in new ways.

Topic by fungus amungus 11 years ago  |  last reply 11 years ago


Alternative Photography Project

I am currently in the Advanced Photography class at my high school. One of the assigned projects is simply titled "Alternative Photographic Technique." Basically, we have to create an image without using 35mm film (not digital, either). The specific techniques that he recommends are:Photogram-arranging objects directly on the photo paper, without using a camera at allHolga- The teacher has a few Holga cameras with 120 film for class use to take artistically lousy imagesPinhole Camera- If you don't know what this is, you probably can't answer my question anyway.Cyanotype- a special emulsion is painted on watercolor paper, then exposed in sunlight under a large transparency. Search "cyanotype" to see what it is.Polaroid image transfer- an image taken with a Polaroid Two-Step camera is transferred from the film to watercolor paper-looks cool, but expensiveCan anyone suggest other interesting ideas? I'd like to keep it simple and inexpensive, and I have to have 8"x10" total printed image.Weissensteinburg? Are you there?Edit 5-12-08: I have printed some 5x7s with my cool new technique. I matted them today, and I turn them in on Thursday.

Topic by CameronSS 11 years ago  |  last reply 10 years ago


Knex Creations of the Year Awards

Alright sorry I didn't quite start this earlier as it's already New Year Eve but better late than never. You have tonight and tomorrow to vote for your favorite knex creation in each category. I'll tally it all up and announce the winners the day after new year. You may vote for your creation in only five categories. Please only vote for things made this year. You may vote for things that were made but never posted as long as you provide a picture of it and the creator provided enough information about it.~Categories~-Best Sniper/ Power Weapon-Best Mid-Sized Assault Weapon-Best Assault Pistol-Best Automatic Weapon-Best Melee Weapon-Best Side Arm-Best Explosive-Best Non Weapon Object-Best Large Caliber Weapon-Best Shotgun-Best Replica-Most Innovative Build-Greatest Builder-Best Feature in a Knex Weapon (no people as in who made a feature and in what gun? Don't just list a feature like magazine) Any other ideas? Post them quick as I need at least 3 votes for a nominee for it to win.

Topic by TheDunkis 10 years ago  |  last reply 7 years ago


PC SLAVE TOWER

Ok here is the idea, I have a main tower, plus a dozen or so old ones.  I wsa wondering if it is possible to some how link 2 motherboards so that one acts as a slave for the other.     First thought was that it may be as simple as running a cable from the ide ports.  That may be totally off but that is where I got the idea.    Target goals of theory 1. Additional disk drives- this would allow you to use additional HDD in the other case this was my primary objective. 2. Might the additional processor be able to split the tasks of the computer as a whole? In theory would it then be ran as 2 seperate computers or as one whole with dual processors (does such a thing exist?) 3. extra usb space. 4. additional vga outputs- I have 5 screens right now using the onboard, a dual port pci-e and a pci vid card plus a usb adapter one.  rather clusterry.  I have a additional screen but no card space for it.  I intend to eventually be able to use each independantly or as one large 2x3 screen for watching movies, but that in itself is not as of yet crucial to the theory. So can it be done buy this method or for that matter any method? If so how would I even start? I thank all those much wiser on this that I in advance

Topic by married_n_macon 8 years ago  |  last reply 8 years ago


What would you do?

In 1908, a meteor the size of a truck obliterated 2000 square miles of Russian countryside. Over a populated area, that would have incinerated a city the size of modern New York.The next major threatening event could occur in less than 20 years. Asteroid Apophis is due to pass close to the Earth and analyses suggest a one in 45,000 chance of a collision, and an impact one hundred times more destructive than the Tunguska event. Overall, major impacts occur on average every thousand years or so.Although the chance is, on the face of it, quite small, that is just the risk of one particular, known Near Earth Object ("NEO") hitting us on the next pass. There are hundreds of other rocks out there, large enough to cause significant damage, and we don't know where all of them are.UN scientists are calling for proper, internationally-concerted preparations to prevent such a collision.Of course, any plans made so far are pure hypothesis, blue-sky thinking of the most literal kind. They range from gentle nudges with solar sails, to whole-scale nuclear obliteration.So, Makers, what would you do?How would you avert disaster?How would you detect and track dangerous rocks?How would you prevent them causing damage? Deflection? Destruction? Or would you exploit them somehow?Post ideas, sketches, wild suggestions or sensible plans. Association of Space ExplorersNASA's NEO pagesNASA Flash animation

Topic by Kiteman 10 years ago  |  last reply 10 years ago


Letter from the editor

Hey gang,  This is my first "letter from the editor"! There is so much to write about and a limitless array of Instructables "stuff" that could be mentioned but with the newsletter and Facebook doing such an excellent job of keeping everyone up to date, I wanted to write something slightly more personal.  During most of college I worked at an art museum. One of my favorite exhibits was a large collection of toys, art and other things made primarily from metal cans. The exhibit featured things from all over Africa and the Caribbean. It has been one of those lingering experiences that just stuck with me, the magic of what people can and will do with what they have.  This year I was lucky enough to get just such a "toy", it seems like much more than a toy, as an early birthday present! The lovely gal that gave it to me had no idea I was enamored with these things, so it was all the more endearing that she knew I'd like it.  The piece is made entirely from re-purposed materials and I couldn't find any glue, solder or tape anywhere on it. The frame is bent wire and the body made from tomato cans. There are a handful of things that are held together by strips of inner tube, like the wheels made from the tops of aerosol cans. The whole thing is in general, fantastic!  I feel like this embodies so much of what and why we do what we do on Instructables and in this way we share a commonality of spirit with people and places many of us have little hope of seeing or truly understanding. The DIY spirit and ingenuity that is common in these places is something that I feel has steadily slipped away from the mainstream of heavy "consumer" nations.  The thing I like best about this is that even though there are other similar toys, like the one in the last photo, there will really only ever be one just like this. It has a story and exists in a far more real way than any manufactured toy is likely to have, no matter how long it sticks around, unless it's fortunate enough to be transformed by some clever DIY'er. So, if it's possible for an object to show why we do what we do, I feel like this one does.  I'm thinking we need a contest around this concept at some point!  Thanks for reading a kind regards, Jason Here are a few links from the web that show some more of these. I didn't find much about the objects themselves or the people making them but they are fairly inexpensive to buy and readily available if you go looking.  http://www.indigoarts.com/store1_recycle_2.html http://hubpages.com/hub/Make-your-own-recycled-toys http://growingupgreen.com.au/?p=628

Topic by Culturespy 8 years ago  |  last reply 8 years ago


Circuit to measure internal resistance of a battery?

Dear All I know very little about electronics! So please pardon potentially dumb questions! My objective is to know when to (properly) discard a rechargeable battery and buy a new one. I want to be able to read the voltage of a rechargeable battery when freshly charged. Then I want to be able place the battery under load and measure the voltage as well as amperage again in order to compute the internal resistance. I intend keeping track of these results for this (and other batteries) over time (and also comparing the data to other similar batteries I have). I have created a simple schematic of what I think I aught to do (attached to this post). Known parameters are: - Battery voltages vary from 3.2 to 4.2 V depending on model and age - Battery capacities vary from 700 mAh to 1,200 mAh depending on model and age What I would like to do is: - Have one circuit where I can measure the unloaded voltage (and amperage) - Change a switch and then place the battery under load - with an LED indicating when this circuit is on permitting me to measure the loaded voltage and amperage. What I don't know is: - What size fuse do I use (do I need one?) - What size / voltage LED should I use considering the different voltages of the batteries? - What resistor should I use for this LED? - What resistor should I use to place the batteries under load?  How large should this load be to sufficiently stress the battery but not damaging it? (The 3 Ohm in the diagram is a total guess!) I know I can go and read up on this on various websites - but, being honest - its so much easier to ask! Your advice would be most appreciated.

Question by Farawayman 4 years ago  |  last reply 4 years ago


Archaeology Student needs help with 3D scanning and printing

Hi Guys and Girls, first time posting like this so i hope this is in the right place, and if it is i can get some help. I'm currently studying Applied Archaeology, in the Institute of Technology Sligo, in Ireland, I'm in my fourth and final year and as part of this I have to research and write a thesis. The topic I am planning on doing involves 3D scanning, and if everything goes to plan, it will turn out great, and is something no one has done before in Irish archaeology, Ok so here’s the thing. It is still early days, I haven’t even decided on the title or gotten a chance to experiment with the scanner, and I am relatively new to 3D imaging and all that it involves. But as part of the overall concept of my thesis I would like to haves some of these scans print using as many of the various different methods of 3D printing as I can. This is so I can compare and analysis there suitability. This is where I hit a wall and I hope someone can help. There aren’t many companies that do 3D printing in Ireland and those that do usually deal with medium to large company’s and thus are way out of my price range. Edit: 21.09.2011 Ok after a doing a boat load more reserch I have been able to pick three methods of 3D printing I would like to use: 1. Fused Deposition Modeling using the, RepRap and MakerBot. 2. Laminated Object Manufacturing. 3. Stereolithography. If any of you out there have an interest in Archaeology and can offer advice on 3D scanning, image editing, has access to a 3D printer or are lucky enough to own one of these machines, and are willing to help me out I would be extremely grateful. I am more than willing to contribute what I can to the cost of raw material, cover the postage to Ireland and of course give massive amounts of praise and acknowledgement to all those that have helped, when I’m writing my thesis. Many Thanks Michael Michaelfeeney01@gmail.com  

Topic by Amon-100 7 years ago  |  last reply 7 years ago


Declaration of Independence

When in the Course of human events it becomes necessary for one people to dissolve the creative bands which have connected them with another and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God entitle them, a decent respect to the opinions of mankind requires that they should declare the causes which impel them to the separation.We hold these truths to be self-evident, that all makers are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Tools, Warranty and the pursuit of Customness. - That to secure these rights, Websites are instituted among Makers, deriving their just powers from the consent of the members, -That whenever any Form of Website becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Webspace, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Ideas and Projects. Prudence, indeed, will dictate that Websites long established should not be changed for light and transient causes; and accordingly all experience hath shewn that mankind are more disposed to suffer, while evils are sufferable than to right themselves by abolishing the forms to which they are accustomed. But when a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, it is their right, it is their duty, to throw off such Webmasters, and to provide new Guards for their future security. - Such has been the patient sufferance of these Users; and such is now the necessity which constrains them to alter their former Systems of Website. The history of the present CEO of Instructables is a history of repeated injuries and usurpations, all having in direct object the establishment of an absolute Tyranny over these Members. To prove this, let Facts be submitted to a candid world.He has refused his Assent to Features, the most wholesome and necessary for the public good.He has forbidden his Staff to pass Forum Topics of immediate and pressing importance, unless suspended in their operation till his Assent should be obtained; and when so suspended, he has utterly neglected to attend to them.He has refused to pass other Laws for the accommodation of large districts of people, unless those people would relinquish the right of Representation in the Legislature, a right inestimable to them and formidable to tyrants only.He has called together legislative bodies at places unusual, uncomfortable, and distant from the depository of their Public Records, for the sole purpose of fatiguing them into compliance with his measures.He has dissolved Comments and Topics repeatedly, for opposing with (wo)manly firmness his invasions on the rights of the people.He has refused for a long time, after such dissolutions, to cause others to be elected, whereby the Legislative Powers, incapable of Annihilation, have returned to the People at large for their exercise; the State remaining in the mean time exposed to all the dangers of invasion from without, and convulsions within.He has endeavoured to prevent the population of these Users; for that purpose obstructing the Laws for Naturalization of Free accounts; refusing to pass others to encourage their migrations hither, and raising the conditions of new Appropriations of Features.He has obstructed the Administration of Justice by refusing his Assent to TOS for establishing Moderating Powers.He has made Sherrifans dependent on his Will alone for the tenure of their offices, and the amount and payment of their salaries.He has erected a multitude of New Offices, and sent hither swarms of Officers to harass our people and eat out their substance.He has kept among us, in times of peace, Standing Filters without the Consent of our legislatures.He has affected to render the Military independent of and superior to the Civil Power.He has combined with others to subject us to a jurisdiction foreign to our constitution, and unacknowledged by our TOS; giving his Assent to their Acts of pretended Legislation:For quartering large bodies of armed troops among us:For protecting them, by a mock Trial from punishment for any Murders which they should commit on the Inhabitants of these States:For cutting off our Allsteps with all parts of the world:For imposing Pro fees on us without our Consent:For depriving us in many cases, of the benefit of Refund of Fees:For transporting us beyond Seas to be tried for pretended offences:For abolishing the free System of Exchange of Ideas in a neighbouring Webspace, establishing therein an Arbitrary government, and enlarging its Boundaries so as to render it at once an example and fit instrument for introducing the same absolute rule into these directories:For taking away our Favorites, abolishing our most valuable Features and altering fundamentally the Forms of our Websites:For suspending our own Legislatures, and declaring themselves invested with power to legislate for us in all cases whatsoever.He has abdicated Government here, by declaring us out of his Protection and waging War against us.He has plundered our seas, ravaged our coasts, burnt our towns, and destroyed the lives of our people.He is at this time transporting large Armies of foreign Mercenaries to compleat the works of death, desolation, and tyranny, already begun with circumstances of Cruelty & Perfidy scarcely paralleled in the most barbarous ages, and totally unworthy the Head of a civilized website.He has constrained our fellow Citizens taken Captive on the high Seas to bear Arms against their Country, to become the executioners of their friends and Brethren, or to fall themselves by their Hands.He has excited domestic insurrections amongst us, and has endeavoured to bring on the inhabitants of our frontiers, the merciless Indian Spammers whose known rule of warfare, is an undistinguished destruction of all OSs, platforms and softwares.In every stage of these Oppressions We have Petitioned for Redress in the most humble terms: Our repeated Petitions have been answered only by repeated injury. A Prince, whose character is thus marked by every act which may define a Tyrant, is unfit to be El Jefe of a free people.Nor have We been wanting in attentions to our Hacking brethren. We have warned them from time to time of attempts by their staff to extend an unwarrantable jurisdiction over us. We have reminded them of the circumstances of our emigration and settlement here. We have appealed to their native justice and magnanimity, and we have conjured them by the ties of our common kindred to disavow these usurpations, which would inevitably interrupt our connections and correspondence. They too have been deaf to the voice of justice and of consanguinity. We must, therefore, acquiesce in the necessity, which denounces our Separation, and hold them, as we hold the rest of mankind, Enemies in War, in Peace Friends.We, therefore, the Representatives of the Members of Instructables, in Freenode on #instructables, Assembled, appealing to the Supreme Judge of the world for the rectitude of our intentions, do, in the Name, and by Authority of the good Posters of these Forums, solemnly publish and declare, That these united Dirs are, and of Right ought to be Free and Independent Sites, that they are Absolved from all Allegiance to the Robot Crown, and that all TCP/IP connection between them and the Site of Instructables, is and ought to be totally dissolved; and that as Free and Independent Sites, they have full Power to assign Mods, post content, contract sponsors, establish Advertising, and to do all other Acts and Things which Independent Sites may of right do. - And for the support of this Declaration, with a firm reliance on the protection of Divine Providence, we mutually pledge to each other our Tools, our Kiteboards, and our sacred Honor.None of the above, is, of course, intended seriously. Dur. IT'S A JOKE, peoplez. Sheesh.

Topic by Lithium Rain 9 years ago  |  last reply 9 years ago


The Community Over the Years

In the seven years I've been on Instructables, one thing I know to be true is that the community has changed. A lot. It is amusing to look over the "How to Steal An Instructable" post made years ago, which satirized the theft of projects. Looking back on things as old as this proves funny but also depressing though; the community has changed so dramatically in the years that have transpired that copied projects are now no longer the objects of satire or chiding but the recipients of praise and prizes. A few months ago, when I again broached the topic of copies on Instructables and the problems they cause, I was met with responses indicating that to overcome copycats all one needed to do was work a little harder. That is, those who have already put forward the effort of actually developing something new and of their own design should now work even harder to succeed. Curiously absent was any suggestion that copycats exert themselves and actually do something say--original. By chance, I ran into a thread I had not seen in years while writing this: the thread on the "Instructables laws," guiding principles users ought to observe. There are four, with some accompanying notes to all. The first entry, the Zeroth Law, is the one relevant to projects and their content. It states that: "if an Instructable exactly like yours has not already been posted, then you shall post your Instructable." An addendum is made to it, stating: "If your Instructable has an identical goal to a pre-existing Instructable, but achieves that goal by a different or improved route, or in a different style, then you shall also post your Instructable." The legitimacy of simplicity is also noted in an accompanying corollary. None of the above ideas are wrong. On the contrary, it is people ignoring this thinking which has caused serious issues. Nowadays, people know other projects have been published with identical instructions (and even superior quality), yet they proceed on and repost it themselves anyway. Furthermore, their copying usually violates the copyright restrictions laid out by the original creator. When the Instructables laws were written down, it is clear that original content was valued highly and respected. Nowadays, the dedication of the community toward these ideals is questionable to say the least. Today the community displays a disconcerting apathy toward makers and what they do. Just a few weeks ago, I was told the community is not interested in anything but the results--that the makers and their efforts are completely irrelevant. I'd rather not believe that is how the community at large believes things ought to be (especially given that it's a particularly unimpressive pitch to attract new makers and new ideas), but it seems like it may in fact be just that. With that in mind, things have obviously changed--for better or for worse is in the eyes of the beholder; I have already reached my own personal conclusion.

Topic by OrigamiAirEnforcer 2 years ago  |  last reply 2 years ago


Paper Airplane Contest 9 (Closed)

Because speed appears to a popular theme among origami aircraft designers, I have decided to direct this new paper airplane contest--(PAC9) in their direction, in hopes of seeing even more innovative instructables from them. For this contest, the specifications are for a fast, long range paper airplane. Requirements: 1. Aircraft Requirements: • Ability to: (A) fly at least 50 feet; and ( B ) fly at a speed of 20 feet per second (~6 meters per second) • Durability to fly at least 20 flights • Use of less than 3 inches (0.0762) of tape in construction • Use of 1 piece or less of 8.5 by 11 inch (A4) paper in construction • Other permitted materials are a large paper clip and up to 3 staples • Aircraft must be named 2. Instructable Requirements: • 1 page (not the intro page) strictly devoted to materials required in construction • 1 page explaining how to fly the aircraft • The instructable’s license must be: "Attribution Non-commercial Share Alike (by-nc-sa)" • This sentence and link must be displayed on your entry's intro page: “This instructable is an entry in Paper Airplane Contest 9.” Prizes: For this contest I will award the publishers of the top 5 performing paper airplanes* one patch each. Each patch will feature its respective aircraft, rather than medals. The first place winner will also receive a 1 Year Instructables.com Pro membership if his/her plane meets or exceeds all specifications. *Multiple entries are allowed. To keep the distribution of prizes wide however, each entrant can only win one prize. In the event of multiple winning entries, the higher ranking entry will be named. How to Enter: To enter this contest, you must send me a private message entitled “My PAC9 Paper Airplane [Your Member Name Here]” with your instructable’s URL included. I will then put the link and author's name onto a list on this topic under "Entries". Judging: I will judge all the planes myself based on their abilities. I have decided to test this way because I believe judging on performance and suitability, rather than shape, is a more objective approach. The launch height of all test flights is 5 feet above ground level. The contest begins Thursday, September 29, 2011 and ends Friday, October 28, 2011. Entries must be published before Friday, October 28, 2011. From October 28 to November 1, I will be judging all entries. I will announce the winners of the contest on Tuesday, November 2, 2011 and issue them their prizes Wednesday, November 3, 2011. Entries:

Topic by OrigamiAirEnforcer 7 years ago  |  last reply 7 years ago


Assistance needed for coil gun design. Any help appreciated.

Hello. Frequent reader, first time posing. I have been working a coil gun project for awhile now, nearly a month.  Originally I was using a pre made coil I took out of a fan.  The coil itself is roughly 42 gauge wire, with roughly 8-10 layers, and an inch long. At first I was using flash camera capacitors (300v @ 80uf) and flash camera circuitry to shoot a screw or nail through a pen tube. More recently I have been using a 12vdc to 120vac converter rectified to about 200vdc as a charging unit.  I also obtained some high voltage electrolytic capacitors (450v @ 820uf) that charge after about 2 or 3 minutes. After messing around with with the completed assembly, using a push button to short the capacitors across the coil, I realized that the wire coil itself was limited by its gauge and size and the full potential of the capacitors was not being maximized. So I ordered a spool of 63 feet 16awg magnet wire to make a larger coil for a more powerful and efficient design. So today I wrapped a coil around a 1cm clear plastic tube that was about 4cm long and 3 layers thick. The coil itself has a very low resistance. I hooked up a 200v 470uf capacitor to the coil and the charging circuit and when I fired my push button was welded shut. After that I was just shorting the capacitor across the coil to fire ferrous projectiles, which resulted in a rather large spark where I was shorting it. I noticed lower efficiencies compared to the other coil, which I'm sure has a great deal to do with the the energy the spark waste. So question number one: does anyone know what type of firing switch I would need to handle roughly 500 volts at 10(ish) amps and where I could find one. My objective is to achieve maximum kinetic energy with a 10mm x 30mm projectile. I have chosen to use a clear tube to eventually have a optically triggered multi-stage design. From research I have concluded that a coil should be 33% to 50% larger than the projectile, so my coil length has been established. I would like to know how many layers I should use to maximize the first firing stage with a capacitor rated at 450v 820uf and a coil that is 40mm long. Sorry for such a long post, but any help is greatly appreciated.

Question by MurdaMastaMike 7 years ago


iPad Problems - 14 Problems with Apple's iPad

Apple just revealed the new Apple iPad Tablet that will probably make it one of the first failures by Apple's latest line of products. Apple revealed this new Tablet PC as a challenger to netbooks. However, it's already been labeled a "less powerful, but more expensive netbook." Here are 14 iPad problems that made this Apple iPad an iDisappointment. 1. No Multitasking The Apple iPad is just like the iPhone, in that there is no multitasking. You can't work on a document and talk on AIM or Gtalk. In other words, the iPad just a giant iPod Touch (the iPod Touch being better) and cannot match netbooks. 2. It Has an Awkward Design The design is a bit awkward because you have to hold it in one hand and balance it while your other hand uses the functionality or more likely you will need to put it on your knees to use it properly. It's like holding a monitor, I'm sure nothing will happen to it. Some people complain about the Bezel being too large, but perhaps this was necessary so that you don't constantly give commands while moving around. 3. No Adobe Flash Were you considering watching Hulu on this? How about youtube (well we'll have to wait for an app for that)? Thinking of playing flash games while waiting on the bus? Oh well. 4. No USB, Need Adapters Again with the iPod design, you need to plug in the special Apple adapter. If you lose it, you'll have to buy another. If you want to plug in multiple devices you need USB to iPad adapters! Since it's not even using Mac OS, most USB devices would probably not work anyway. 5. AT&T; Once Again Are you thinking of purchasing the 3G version? You'll need to get it with AT&T; and think of how overloaded their service will be now. There is no Verizon, T-Mobile, or Sprint service available for this product, some of which has better coverage. You can't use T-Mobile's 3G at all because of their MicroSIM made specifically for AT&T.; 6. Memory Business Model Apple will charge you extra for higher memory. It's a business model they use for all their products to increase profits. That's why they don't want other storage devices being inserted to improve memory. You're also stuck with a limit of 64GB, so don't think about putting in all your music, movies, or games. 7. Touch Keyboard Many people were complaining about the touchscreen keyboard. Which would be fine if it worked perfectly and you didn't have to sit it exactly on your lap and make sure it's flat. You can however, attach an Apple keyboard, just another way for Apple to make money. 8. App Store Again Just like the iPod Touch you have to download everything from an App store. Meaning if you don't like Safari, you're stuck with it. Some apps may be banned once again. 9. No Cameras Yeah no web cams on the front, and no cameras for photos or videos from the back either. 10. No Removable Battery You can't just take an extra battery with you on a long trip because the battery works the same way as an iPod (though my bet is, it doesn't last as long). 11. No HDMI/DVI Output You can't plug this thing into your TV to display your HD movies. You'd need AppleTV for that. 12. No Widescreen 16:9 ain't happening, you're stuck with a 4:3 screen. 13. No GPS There's no GPS, so --unlike the T-Mobile MyTouch or the Verizon Droid which both run on Android, can multitask and have GPS so that you can use the Beta Google Maps Navigation system for turn-by-turn directions-- you're stuck with locating yourself via WiFi hotspots. 14. It's Large, Slow, and Clunky Not only will you have to buy accessories to protect your device, it's very large making it easy to drop and probably won't live a healthy life in a backpack filled with notebooks and other possibly sharp objects. There may be a number of accessories sold by Apple to cover some of these problems. The iPad max speed is 1GHz (A4 processor) and will probably be just as slow surfing the web as most other smartphones and it won't match up to netbooks. There is no Mac OS X or anything either, it's definitely the iPhone OS except without the Phone capability and of course I'm sure they will ban Google Voice and Skype. The iPad is about the size of a Kindle, so it is nice for reading e-books I suppose, but then I'm not sure why I wouldn't just buy a Kindle. As with all companies that initially have much success, they get a little overconfident and launch a product just to create more hype and increase their stock prices.   More related iPad Problem resources: ipad wiki - What you need to know about iPad The iPad is a tablet computer developed by Apple Inc. Announced on January 27, 2010, it is similar in functionality to the iPhone and iPod touch, running the same operating system (iPhone OS) and almost all of the same applications...

Topic by newstigers 9 years ago  |  last reply 8 years ago


Trouble with compiling Arduino program to control two servos with 10 set postions any pointers where I am going wrong?

I am having trouble getting this program to compile I have rewriting from the top but i cant get it to work Code: const int btnRearuppin = 2; const int btnReardownpin = 3; const int btnfrontuppin = 4; const int btnfrontdownpin = 5; const int maxreargear = 10; int btnRearupmode = 0 ,btnReardownmode = 0 ,btnfrontupmode = 0 ,btnfrontdownmode = 0 #include Servo frontGearservo; // create servo object to control a servo int frontgear = 0; // variable to store the servo position Servo reargearservo; int rearGear = 10; const int maxRearGears = 10; const int minRearGears = 1; const int frontgearmax = 2; const int frontgearmin = 1; int btnRearupState; // the current reading from the input pin int lastbtnRearupState = LOW; int btnReardownstate; int lastbtnReardownState = LOW; int btnfrontupstate; int lastbtnfrontupState = LOW; int btnfrontdownstate; int lastbtnfrontdownState = LOW; long lastDebounceTime = 0; // the last time the output pin was toggled long debounceDelay = 50; // the debounce time; increase if the output flickers void setup() { pinMode(btnRearuppin,INPUT); pinMode(btnReardownpin,INPUT); pinMode(btnfrontuppin,INPUT); pinMode(btnfrontdownpin,INPUT); frontGearservo.attach(9); reargearservo.attach(10); } //Possible positions of the front derailleur for gears 1 - 8 when on small front sprocket int frontGear1[] = {121, 121, 120, 119, 119, 118, 117, 116, 116, 116}; //Possible positions of the front derailleur for gears 1 - 8 when on large front sprocket int frontGear2[] = { 97, 97, 96, 95, 94, 93, 92, 92, 92, 92}; //Positions of the rear derailleur for gears 1 through 8 int rearGears[] = {132, 125, 116, 105, 96, 84, 73, 62, 55, 49}; void loop() { int reading = digitalRead(btnRearuppin); if(btnRearupState = HIGH) {//you clicked a button // check to see if you just pressed the button // (i.e. the input went from LOW to HIGH), and you've waited // long enough since the last press to ignore any noise: // If the switch changed, due to noise or pressing: if (reading != lastbtnRearupState) { // reset the debouncing timer lastDebounceTime = millis(); if(rearGear < maxRearGears){ //if we still have gears left to shift to rearGear++; //increment to the next gear moveServos(frontGearservo, reargearservo); //tell the servos to move } } } else { btnRearUpPressed = false; //confirm that the button is no longer pressed btnRearUpDebounceCnt = 0; //reset debounce } {boolean moveServos(int front, int rear) //get the new position of the rear servo rearServoPos = rearGears[rear - 1]; //get the new position of the front servo if(front == 1) frontServoPos = frontGear1[rear - 1]; else frontServoPos = frontGear2[rear - 1]; //move the front and rear servos frontServo.write(frontServoPos); rearServo.write(rearServoPos); //wait for the servos to reach their position. delay(100); return true;} Thanks in advance

Question by Talkingriver 7 years ago  |  last reply 2 years ago


Redesign instructables to make searching easier and more practical!?!?!?

I'm fairly new to instructables. i've only read about 100 or so and not made any myself. for the most part i can rarely find an instructable that is of high enough quality end-product or end-result for me to commit to making it instead of starting from scratch and designing my own thing, or buying something that has already been produced for a more affordable and higher quality end-product. but there is one huge reason i remain committed and interested in instructables as a website and a community! my dad has a garage full of high-potential junk! now if only there were an easy way for me to search instructables for projects based on my plethora of ingredients (inventory) rather than typing finished project titles or end-result names of creations into the search bar. i understand that this may be extremely hard to do since there may literally be an infinite number of names and objects, not to mention the various languages, misspellings, and misnaming of objects and processes that would need to be accounted into the search process as well. the idea would be that instructables users could rack-up all their junk and save it as a list to their own digital library or, "inventory" of all the parts and tools they currently have and manufacturing processes they can do with said items. from there they could click "search by inventory" and include or exclude items from their total inventory to run a search based on that. for example i could select: -super old motherboard (or specific part number) -old motorcycle seat -some bolts (or specific sizes of bolts) search results would turn up projects based on the parts that i have selected, results would mention whether i am missing or have all of the tools or parts i searched for. imaginary examples might be stuff like: -strange computer motorcycle seat -cyborg motorcycle seat -a computer build from an old motorcycle seat -ride fast while computing fast -tune your old motorcycle with an old under-the-seat DIY ECU -etc. though, this sounds like a daunting task, especially with the numerous vague and sometimes seemingly useless projects people can come up with, instructables has already begun to specify categories and sub-categories (channels?) of project styles such as leather-work, CNC, electronics, wearables, etc. etc. and to add tags and specific names for parts, tools, and processes to a library would simply be a more detailed and concentrated addition to these categories. what i'm hoping we could maybe do is add an option to search by ingredients in a similar way to how myfridgefood.com searches for recipies (maybe we could start by adding a similar function to instructables' recipies category?). it's just an idea and i'm not sure how willing the developers of instructables are to allow this community to contribute to the redesign or addition of search options.  aside from searching by ingredients, it would be extra helpful to know if there are other instructable members in our local neighborhood who are willing to collectively use their junk to make a project together! combined inventories could lead to a world of possibilities for creations and networking! maybe one person doesn't have enough junk to make their own forge but a whole neighborhood would be willing to contribute their efforts to make a community forge? i know my dad isn't the only one in our neighborhood with a garage-full of junk, and i think with everyone's junk maybe we could send a project to the moon, or make a super awesome rat-rod, or make a community wind-turbine farm, and get all that legally approved by our local comminity! maybe as a neighborhood we could create something only large companies are currently capable of manufacturing!?!?!? and finally on a side note i think maybe there should be a filter between serious and non serious ("fun") projects. or at least a rating service so that readers can scale how serious they think a project is on a serious to fun scale with fun and serious being in the middle. that way everything stays positive and constructive; no negativity for being too serious or too fun! yeah that last idea is pretty crazy, but maybe we could start with my first small idea of searching by parts/ingredients? let me know your thoughts! thanks!!! (expecting answers along the lines of where to start, whether or not other instructable-type websites exist, i know for a fact this is possible and doable since myfridgefood.com basically has the format set up to do so.) i'm open to (negative) answers that completely tear apart my idea as long as they are educated and provide specific counter-reasons as to why it would not work. i'm fairly certain the first idea is possible, it's just a matter of convincing the developers to get on board and getting everyone to start labeling the parts, tools, and processes in their projects (they are already "tagged" maybe we could start there?)

Question by joombaloomba 2 years ago  |  last reply 2 years ago


SIGGRAPH2010 - Emerging Technologies Exhibition

Last week I went to Los Angeles to attend my first Siggraph conference. There were so many different events to attend throughout the week. I spent the majority of my time exploring the emerging technologies exhibit. With all the interactive and innovative demonstrations it felt like I had stepped into the future for a moment! In this slide show I will highlight my favorites from emerging technologies. Some of these pictures were taken by me and some I took of their website (you will be able to tell which are which). If you see something that interests you I would suggest following the links I provide to learn more. Organized by picture (put cursor in top left corner of picture to figure out what picture you are looking at) Colorful Touch Palette (1) This is an electro-tactile stimulation systems that allows the user to feel and experience the tactile sensations of painted textures. Blend and combine textures to create new sensations. Shaboned Display - An Interactive Substantial Display Using Soap Bubbles (Favorite) (2-5) This was my favorite exhibit in emerging technologies even though parts of the bubble machine weren't working. This system is designed to show images in a matrix of soap bubbles. Air pumps lie beneath the display controlling the size and shape of the bubbles by monitoring the amount of air released. This system is also interactive! When a bubble pops (touch a bubble with your finger) a musical note will play! LED Tile by Junichi Akita @ Kanazawa University (6-7) Use a laser pointer to draw on these tiles to create patterns on LEDs.  To create large display areas connect individual units of LEDs which will allow them to communicate.   You can also interact with these displays in various ways.  Tilt the tiles and the LED patterns will look like they're falling off the tile in the direction tilted. 360-Degree Autostereoscopic Display (8-9) 3D graphics with out 3D glasses.  Using 360-degree autostereoscopic display technology you are able to view all angles of a 3D volumetric objects. I don't understand all the technical details, but this I do understand...you can use this technology for 3D interactive games, cool!  You can see in the images there is an interface to play BrickBreaker.  Walk around the device as you are playing the game. Imaging Skyping with this!!!!!!!! Haptic Canvas: Dilatant Fluid-Based Haptic Interaction (10) This new technology allows you to experience new haptic sensation by putting your hand in a pool filled with dilatant fluid.. Dilatant fluid is just a 1:1 mixture of starch and water.  It has a solid-like state when an external force is applied to it (grabbed, pushed, or tapped).  And it has a liquid-like state when it is free from the external force. This research is to create a new haptic interaction using this dilatant fluid by controlling the change in state, or dilatancy, of the fluid.  They have created a glove with a sucking tube and a filter which creates a change in state of the dilatant fluid.  The haptic sensations come from the friction between the jammed particles around the finger and at the bottom of the pool. You can see me trying this device (I don't think the camera man understood what I asked him to get me in the frame, but you can see my hand!).  This video gives a great explanation. Meta Cookie (11-12) Imagine eating a lemon and it tasting like chocolate!  This is the worlds first "pseudo-gustation system" which allows humans to perceive various tastes by changing visual and olfactory information.

Topic by Carleyy 8 years ago  |  last reply 8 years ago


"Bug" - Issue with image importer converting .PNG files to .JPEG

Update: posting this topic further illustrated that something weird is happening with how Instructables handles images. The image as shown above shows both left and right sides with the text blurry. If you click on the image, the left stays blurry (as it should because it was) whereas the text on the right shows clear and sharp. I give up on the root of the problem, but it's frustrating how the image quality gets messed up.I put "bug" in quotations since you never know if it's a bug, unintended side effect, technical limitation or external problem. I'll let Instructables be the judge. Regardless, I thought it might be worth bringing attention to since I'm probably not the only one to have experienced it.While I use RAW images converted to JPEGs in Lightroom for my main project images, which tend to look beautifully, I normally use Canva to design my title images. Mainly due to being able to add text, shapes or any other elements in layers. Canva exports by default in .PNG format, which is probably the most popular image format after .JPG due to its support of transparencies and lossless compression. For that reason it's normally preferred for header images and graphics. I tend to use a ratio of between 4:3 and 16:9 to make things easier for the file uploader, as well as a longest edge of 1024px since that looks like it's what Instructables wants so it won't be resized. Despite trying to make things easy for the uploader, my title images have always been the blurriest, noticeably more so than the rest of the images or the image uploaded. Today I finally did some tests and found out that on import of .PNG files, the uploader noticeably deteriorates the quality of the image when converting it to JPEG, even if it isn't resizing it. A picture is attached as evidence. It seems to particularly affect portions which are highly saturated or text, greatly desharpening it. It makes a good image look like it's been carelessly edited. For the image to maintain its quality, I have to take the original .PNG and convert to .JPEG on my own (Photoshop), and then upload the .JPEG to Instructables (instead of the .PNG). As a user, what I'd optimally like to see done is: Fix the importer to properly support .PNG images without deteriorating the images. It is way too popular a format to not accept. I do realize it might be a Canva color space or other such issue, but it probably wouldn't be limited to that program anyway. Nonetheless, if this isn't possible, I'd be happy for the system to simply not accept .PNG and to throw-out an error message telling me to convert the images on my own and only upload .JPG. That would at least avoid image quality being inadvertently affected. Make available an up to date FAQ page where all information regarding images is available: what formats are natively accepted, what is the optimal ratio for images, what is the optimal resolution for images, to what sizes an image is resized on import, or any other relevant technical image details. I've researched this multiple times in the past and there are a lot of people with the same questions in the forum. Especially when it comes to sizes and ratios (cut off images, etc). Most of the information is from years ago (ex. 2010) and cannot be trusted to be up to date. Up to now I've uploaded plenty of 18 megapixel images when it is unnecessary given that the largest size shown, I think, is "LARGE" size at 1024px (I believe). A place to educate ourselves objectively on this particular site's preferences would be appreciated.Anyway, thought I'd comment this since it was a relief to finally find out the origin of the problem.

Topic by MillennialDIYer 1 year ago  |  last reply 1 year ago


Laser Cutter Contest Winners!

It is with great pleasure that I announce the winner of the Laser Cutter Contest:Stuart.Mcfarlan for How to Make a Three Axis CNC Machine (Cheaply and Easily)Be sure to check out Stuart.Mcfarlan's plans for the Laser Cutter.Congratulations to all the finalists who will receive a Laser-etched Instructables Leatherman Juice S2 and an Instructables t-shirt for their simply amazing work:crabfu for Steam Turbine Tankdave spencer for erupting Volcano Birthday CakeHonus for How to make a Green Lantern ring- including a glowing version!jabroutin for personal powerPlantjeffkobi for Retro Hi-Fi ProjectKasey for Compubeaver --> How to case-mod a beaver - in 29 easy steps!lkrasnow for Precision Puzzlemaking Primer -- Volume 1mikejedw for Pringles Wind Turbine (Pleech) - Version One mydian_nightshade forFurniture grade cocktail arcade cabinetmzed for Low-cost Spherical Speaker Array nemomatic for Giant Squid kinetic sculpture from found materialsorthonormal_basis_of_evil for EMP shopping cart lockertalbotron22 for DIY Kitty Crack: ultra-potent catnip extract turkey tek for Interactive Multitouch DisplayWe had planned to select 20 second place winners, but just couldn't narrow the field, so we're awarding 25 second place winners, who will receive Instructables t-shirts! They are:$30 High-Speed PCB Drill Press by lancandy$60 Laser Engraver / Cutter by cgoshBreath powered USB charger by jmengelBuild a Tetris DVD (or book) shelf by odecom5Capture the Ethereal Beauty of Everyday Objects Using Polarized Light. by Tool Using AnimalCO2 laser that cuts sheet metal by owhiteCosmic Light With LEDs Embedded in Resin by technoplastiqueDuck Cam Decoy by RoadstarElectromagnetic Floater by J_HodgieFine Silver (99.9% pure) Popcorn Pendant! by roughtyperHan Solo in carbonite chocolate bar! by FreakCitySFLaptop Converted to 2nd Monitor by punish3rMake a wall avoiding Robot! a collaboration led by Brandon121233Make Conductive Glue and Glue a Circuit by mikey77Make rope out of dead plants -- with no tools a collaboration led by phyzomeMod a toaster and have retro art toast for breakfast by 5VoltMotherboard PCB Bracelet by llama13Portable Water resistant LED Picnic Blanket with hard center serving surface! by pointcloudStart a Guerrilla Drive-in by plusbryanThe Ice Bulb by mandrakeThe Intimate Video Light/ Handheld photograpy light. by curve12The One, The Only COTTON CANDY MACHINE! by T3h_MuffinatorTheater Effects: Gunshot Wounds by TrumpetNeelUse a Vacuum cleaner to build your own Skateboard by gregorylavoieWire Scorpion by OniToraAll the winners should watch for a personal message from us for prize claiming instructions.With so many excellent entries, and with each of them being at the top of their game in some different aspect, the judging was extremely difficult. We had help juding from a large number of users including 5Volt, african_andy187, Albetcha, BobbyMike, CameronSS, canida, daenris, drinkmorecoffee, ewilhelm, fungus amungus, herrozerro, ian, imanalchemist, J_Hodgie, jamesh, jesse.hensel, jessyratfink, jmengel, Kiteman, LasVegas, lebowski, lennyb, llama13, lothotrity, momo!, nagutron, nak, noahw, olddaddycrane, pt, Randofo, Robyntheslug, royalestel, ryzellon, Sam Noyoun, saul, Sedgewick17, sheekgeek, stasterisk, steven07, T3h_Muffinator, technick29, Tetranitrate, Tool Using Animal, trebuchet03, trialex, x9a, zieak, and Zujus. For more information on how we judged, check here.The entries submitted to this contest exceeded all of my expectations. They are totally amazing in their quality, instructional value, uniqueness, and pure brilliance. It is my hope that everyone had a blast entering the contest and learned something useful, fun, or both. To me, the value of posting an Instructable is when someone makes a comment saying that I taught them something new, changed the way they looked at things, or inspired them to make something themselves (even if it's something totally different than my Instructable). Looking through the Instructables submitted to the contest and comments on the finalists' forum posts, it's clear that this is happening all over, and it makes me smile every time. Congratulations to all the winners! And, thanks to everyone that entered. Even if your Instructable didn't win a prize, I'm sure it has had a positive impact on someone's life and will continue to do so.

Topic by ewilhelm 11 years ago  |  last reply 9 years ago


Field report: Mads Hobye as an Artist-in-residence at Instructables

Mads Hobye was granted an artist-in-residence at Instructables for September 2012. Instructables is a web-based documentation platform where passionate people share projects they do, and how to do it. Because of the creative nature of the website, Instructables also have lab facilities for their own co-workers and for artist-in-residences. During September, Mads had the honor to use their lab to build and document multiple prototypes to be shared on their website. I choose to put my focus on building interactive noise machines, since this ties into my PhD and my interest in creating non-trivial internal complexity. I have been working long into the night most days and it has been really interesting to have the chance to focus on one thing at the time. Although the primary purpose of the stay was to explore the potentials of designing interactive sound machines, a couple of other side outcomes were also planned. First, to see how Instructables organized their creative workspace and get inspiration for organizing the upcoming Connectivity Lab at Medea. Second, to see if Instructables would be a suitable platform for documenting the creative practices at Medea. Take aways from Instructables as a creative workspace Although Instructables primarily is a company running a website, they have quite extensive lab facilities. This consisted of a small lab at the office (sewing, electronics and woodwork) and two blocks down they had a whole space filled with laser cutters and 3D printers. This is located right beside the Techshop, which is a full-fledged lab for everything from metal to 3D printing. I have picked up the following things that struck me as really good ways of structuring lab work: Documentation table: A documentation table with lamps, camera and a white sheet of paper as background enables people to quickly document their projects with a nice white background. It was interesting to see how this improved the overall quality of the documentation. Suddenly a breadboard and some wires became a piece of art or a pedagogical platform for show and tell instead of an unfinished project. Show-and-tell meetings: Twice a week they meet at two o'clock to do a show and tell. Here they take a round and everyone says what they are working on in one or two sentences. This is a really easy way to get everyone updated and it takes no time at all. If you are not present you can email out one sentence telling everyone what you are doing. Once a week it is about the specific day and once a week it is about the coming week. Have everything in the same lab: The separation between the labs has confirmed to me the importance of having everything in the same space. It takes time to walk two blocks to lasercut which limits the creative process of iterating between e.g. lasercutting and soldering. Instructables as a workspace was one of the most easy going creative loving workspaces I have ever had the chance to be a part of. Although I never got to know the formal rules, you had a clear sense that people had the freedom to prioritise their own work day and combine it with creative side projects (as long as they documented them of course). Instructables as a knowledge sharing platform for the Medea Connectivity lab Instructables works well for sharing individual recipes for others to use, but what came as a surprise to me was the ability to create groups as individually branded websites. This enables a group of people to collect their recipes under a common theme or brand. We will use this as a common platform to share the knowledge created in the Medea Connectivity Lab. This way people can get an overview of the projects done in the lab. This will become a mandatory part of using the lab in the sense that students and co-workers will be encouraged to document their projects and publish them in the group. So far my experience with posting instructables has been quite interesting and overwhelming. Where projects normally ends as interesting portfolio documentation, the detailed documentation of the build process enables others to recreate your designs or their own versions of them. So far this has resulted in multiple people making their own version. One example is the Arduino implementation of the touche shield (https://www.instructables.com/id/Touche-for-Arduino-Advanced-touch-sensing/). This was published in May 2012. As of now, I know of ten people who have recreated the design and just as many has made suggestions for improvement. Another project has been rewritten by an enthusiast in Dubai. It now runs faster and uses less memory. You can find the preliminary group for Medea connectivity lab here. Non-trivial-internal Complexity as facilitator for curiosity = making noise machines As a part of being an artist-in-residence at Instructables, I took it upon myself to build of couple of noise machines / music boxes. My interest was in designing objects that would enable people to explore the world of sound synthesis and for me to get a better understanding of how the different interfaces enables different interactions and sound qualities. This is a part of an ongoing investigation on creating interactions for curiosity. It has been an intense experience. Trying to build as many interfaces as possible within one month. I have tried to make all of them stand-out as finished, while still being hackable pieces. Everything I have done is published on Instructables for others to experiment with. All of the projects consist of a few basic components: An interface and sometimes a screen or a led matrix. The basic sound component is either a Gameduino or a software synth written for the Arduino platform. You can find an overview of the results here and I will introduce them in this article as well. Although arduinos are good for simple action <-> reaction interactivity, there are a limited amount of examples that work with more complex interactions. Here I mean beyond game design’s way of working with narratives, but more in the sense of adding personality to your projects. Personality not as much in the way of looks (e.g. putting an Arduino into a teddy bear), but more in the way of complex interactions that makes you curious about its devices potential possibilities. My interest as an artist-in-residence at Instructables were to design different machines that would spark the user’s curiosity. Here, simply put, curiosity lies between the extremes of chaos and predictability. Where chaos becomes uninteresting (from an interaction design point of view) because of its uncontrollable nature and order becomes so predictable that the interaction itself slides into the background of the end-product of the interaction itself. One such example is the light switch. As an adult you usually do not notice your interaction with it. The core question then became how to make people who are interacting with it drawn by their own curiosity of not being able to decode the interaction pattern, all at the same time having a sense that their actions are the main contributor to the sounds. Most of these machines would have been simpler to make as software programs on a computer or even as multitouch applications on a smartphone, but I wanted to have an aesthetic criteria as a frame for my experiments: I wanted to create simple tangible interfaces that would inspire curiosity. The objects themselves should welcome the user to try out and explore their interfaces. Last, I wanted each experiment to be self-contained. Instead of them becoming interfaces for a laptop, they should be the ones who created the music. The end results are still crude and mostly serves as interaction enclosures with future potentials, although they do hint at different interesting interaction qualities. You can find an overview of the boxes here. The singing plant plays with a classic trick of sparking people’s curiosity by adding unconventional interaction qualities to a familiar object. The Kaosduino serves as a platform to explore the complexity of touch on x-y surfaces. The Matrix machine serves as a platform to explore the potential of emergent sound patterns converted from particle systems. The algorithmic noise machine serves as platform to explore the boundaries between chaos and order through complex bit shifting algorithms. Better ways to debug the internals of the Arduino board As a side project, I decided to improve on the debugging capabilities of the Arduino platform. This was in line with working with internal complexity which can be hard to comprehend as the code grows. The program enables you to visualize realtime data on the Arduino board. You are usually stuck with the standard serial output. As the complexity of your Arduino code grows, this makes it impossible to comprehend what is actually going on inside the board. To solve this I have created a little library that will enable you to create your own custom GUI for your Arduino projects. Watch this video to get a demonstration of a basic hello world with a potmeter and a diode: The following are a few key features of the tool: Custom design your interface from the Arduino board: You define which sliders, graphs and buttons you need for your interface. You do this in your Arduino sketch which means that the GUI program acts as a slave to the sketch. All information is stored in your board. Visualize and manipulate realtime data: Whether you are making an RGB light controller or a robot arm, getting a graphical feedback is crucial to understand what is going on inside the board. This enables you to understand whether it is your hardware or the code that is causing problem. Further, the sliders and buttons enable you to tweak the individual parameters in realtime. This way you can see what effect different thresholds have on the interaction. Use the same app for all your Arduino projects: I have made tons of small apps for different projects. My problem is always to find them again a year later. Because we save everything in the Arduino, I only need to keep one app around the Arduino and it will automatically configure the app for the current project. Prototype the interface before you turn on the soldering iron: Because you can design the GUI as you like it (within reasonable limits), you can prototype the interface before you have made a physical interface. This also enables you to divide the tasks between multiple people, e.g. one person is working on the hardware and another person is working on the code. When you have made the physical interface the Guino will integrate seamlessly. You can find the instructables for the Guino interface here. About the author Mads Hobye (b. 1980) is a PhD student in interaction design at Medea Collaborative Media Initiative, Malmö University, Sweden, and co-founder of the Illutron collaborative interactive art studio. He focuses on how digital material can be used for exploring social transformative play situated in the context of everyday life. He has done several large-scale installations and working prototypes, which he is using as a basis for his PhD research. More information is available on Hobye’s work at www.hobye.dk.

Topic by madshobye 6 years ago


Robo-Goat Lives - At least I hope he Will

OK here goes. I work at zoo and I am a self taught geek, (mainly old school). I recently volunteered for a project mainly because I'm too stupid to know that it's not possible :~) Purpose of the program/project To - Engineer, Design and Build an Animatronic Robot Goat for: a Cheetah Conservation Fund in Kenya, Africa. This device will replicate a live goat in: size; appearance; movement; sound and smell (smell supplied by others), that can withstand the sever conditions of the desert, durable, possibly solar powered and easy to transport, setup and operate. Note: Up until this point real goats have been tried but they have not been too successful. They were either too stressed or they were stolen for by locals their meat. Objective(s): To lure Cheetahs into an area and enticement them into a cage trap with a simulated live goat (Robo-Goat), to provide a safe humane and ethical capture of wild cheetahs so that recently acquired state of the art GPS/Cellular tracking collars can be placed on them to help gather information to preserve this endangered animal. Analog Radio Tracking Collars have provided the only way to gather much of the information for many different wild animals. Radio Tracking style of the past has always been a difficult and time consuming endeavor, with old style tracking, large heavy radio collars that broadcast a ”beep” continuously, must be tracked with specialized hand-held radios and yagi antennas. All this to locate an animal being studied. Many times you would have to get close enough to disturb the animal just to find out where it is and then try to track it. Obviously not good “normal behavior” data gathering. The new GPS/Cellular systems track the animal in real time and send back data coordinates on the animals location, elevation, speed and direction as it travels. This GPS information is sent via cell towers, (yes they have them in Africa), to a computer that logs and graphs the movements. The research gathered through these efforts may provide the answers to saving these endangered animals. Project design/methods: #1. Establish parameters Record video & audio movements and sounds of normal & panicked goats Research and study movements and demonstrate what mechanical requirements will be necessary to replicate the minimum needed movements - [DONE]. {Raise and lower head; Look left and right; open/close mouth} Determine movement engine {I'm not sure here} {All of the movements are really axial in nature} {At first I was thinking motors but then there are end stops, control systems, ect. To deal with} {next I'm considering solenoids for the low energy requirements and simple full scale movements, except you cant control the speed} {But now I am becoming fixated on model airplane actuators for low weight, low noise and appendage like joints and accessories} {then I ran across "pager motors" and how they are small powerful and inexpensive some how I don't know where to begin} {can you tell this is all still up in the air?} Throw distance & Speed of movement - [DONE]. {Raise and lower head = 90 degrees of arc from base of neck = 5 seconds max} { Look left and right = 90 degrees of arc from left to right with return to normal center point half way = full movement l-r = 2 seconds max i hope} {open/close mouth = 45 degrees of arc from lower jaw = 1 second max} Repetition rate & pattern {random if possible} Determine audio requirements - [DONE]. {this is easy but requires playback trigger synchronized with mouth} The Cosmetics: Determine body and outer skin requirements – [Engineering]. {aluminum wire frame mesh} {foam sculpted head for low mass} {foam wrap suit for body & legs for low mass} {tyvek skin, airbrushed or penned for low mass} {stainless steel / nylon joints for low mass} DB level of normal and panicked goats - [DONE] {I have determined audio system requirements} Determine control system requirements {clueless at this point} Determine power requirements {I'm thinking deep cell marine battery and solar panels to retain charge autonomously} {amp hour rating for battery and solar charging circuit TBD after R&D; tests} {if solar is not feasible them battery exchange schedule TBD} #2 Acquire all electronic and mechanical parts #3 Create mechanicals Fabricate lightweight frame and skeleton structure. Assemble motion joints and motion engine Assemble and test motor functions Determine estimate of MTBF for spare parts, if any #4 Create & install sound system Edit custom audio media for both normal & panicked goats Utilize 12v Solid State Audio Playback Unit # 5 Create Control System #6 R&D; Testing Test charging and power circuit Final assembly #7 Final test Any help to provide suggestions to get me started on the type of engines would be great. tia

Topic by sharpfocus 8 years ago


Something from Nothing: Films on Design & Architecture

If you're interested in Yerba Buena Center for the Arts' TechnoCRAFT exhibition, you might also want to know about the design film series we're hosting this summer.  See below for more information. SOMETHING FROM NOTHING: FILMS ON DESIGN & ARCHITECTURE Sundays, Jul 11 thru Sep 5, 2 pm In conjunction with our TechnoCRAFT gallery exhibition, we present these eight matinee screenings, covering not only design, but architecture, motion graphics and craft. Sun, Jul 11, 2 pm Refrigerator Fetish: Vintage Industrial Design Films We kick off the series with a selection of funny, bizarre, and maybe even educational vintage product design films, from the 1920s forward. Examining the sensuality of the fridge, the rhapsody of the pencil and the mysterious polishing of unknowable objects, this promises to be a one-of-a-kind day at the movies. Presented live by film archivist Dennis Nyback. Sun, Jul 18, 2 pm Citizen Architect: Samuel Mockbee and the Spirit of the Rural Studio By Sam Wainwright Douglas Citizen Architect chronicles the work of the late activist architect Samuel Mockbee, and his radical educational program known as the Rural Studio. The program teaches students about the social responsibilities of architecture and charges them to provide original and inspirational homes and buildings (mostly from salvaged materials) in rural west Alabama, one of the poorest communities in the country (2010, 60 min, digital video). Preceded by the short Robin Hood Gardens (Or Every Brutalist Structure For Itself) by Martin Ginestie (2010, 17 min, digital video) Sun, Jul 25, 2 pm wow+flutter Assembled by onedotzero, the London-based cutting-edge new media group, this compilation program showcases the most progressive and unpredictable work in motion graphics and short-form media. Fresh talent and celebrated masters alike strive to expand, blur and explode traditional notions of what future moving images could be as a playground for creative expression. (2009, 70 min, digital video) Sun, Aug 1, 2 pm The Greening of Southie By Ian Cheney This incisive new documentary is set in the traditionally Irish-American working-class neighborhood of South Boston, where a new kind of building is taking shape. From wheatboard cabinetry to recycled steel, bamboo flooring to dual-flush toilets, the Macallen building is a leader in the emerging field of environmentally friendly design. But Boston's steel-toed union workers aren't sure they like it. And when things start to go wrong, the young development team gets a little more than they bargained for. A film about building the city of tomorrow…today. (2008, 72 min, digital video) Sun, Aug 15, 2 pm Infinite Space: The Architecture of John Lautner By Murray Grigor John Lautner was the Southern California architect. Even if his name isn’t familiar, you have likely seen pictures of some of his most famous works, such as the space-age “Chemosphere,” the octagonal house on a hill, which has become a Los Angeles landmark. Lautner believed that the purpose of architecture is to create timeless, free, joyous spaces for all activities in life. Infinite Space traces the lifelong quest of a man to create “architecture that has no beginning and no end.” (2009, 90 min, digital video) Sun, Aug 22, 2 pm Rem Koolhaas: A Kind of Architect By Markus Heidingsfelder and Min Tesch Rarely has an architect caused as much sensation outside of the architecture community as Rem Koolhaas. His outstanding creations such as the Dutch Embassy in Berlin, the Seattle Library, and the Casa da Musica concert hall in Porto are working examples of his visionary theories about architecture and urban society. An engaging portrait of the man and his work, the film takes us to the heart of his ideas. Koolhaas has stated "it's the only film about me that I have liked." (2008, 97 min, digital video) Sun, Aug 29, 2 pm The Visual Language of Herbert Matter By Reto Caduff SPECIAL SNEAK PREVIEW! A revealing look at the life story of a highly influential mid-century modern design master. Known as a quintessential designer's designer, Swiss-born Herbert Matter is largely credited with expanding the use of photography as a design tool and bringing the semantics of fine art into the realm of applied arts. Through never-before-seen footage, personal photography and stunning graphic design, the film explores the social and cultural impact of his personal visual language that influenced a generation of designers and artists. (2010, digital video) Sun, Sep 5, 2 pm Handmade Nation By Faythe Levine This charmingly low-fi film documents the contemporary crafting community. These artists, crafters and designers marry historical techniques, punk and D.I.Y ethos while being influenced by traditional handiwork, modern aesthetics, and politics. (2009, 65 min, digital video) Where: Something from Nothing: Films on Design & Architecture – 701 Mission St., San Francisco, CA 94103 – YBCA Screening Room Public Info: 415-978-2787 or ybca.org $8 regular; $6 students, seniors, teachers & YBCA members Enjoy same-day gallery admission for all YBCA presented films!

Topic by YBCA 8 years ago


Input problem with OpAmp-controlled ZVS Induction Heater

Hello, Idea: I'm trying to build a circuit which uses an OpAmp to drive 2 mosfets, which power the LC tank of an induction heater. The idea is to detect when the voltage over the LC tank crosses zero, and at that voltage I would make the 2 outputs of the OpAmp change states from fully on, to fully off. The two OpAmps (both inside one chip) have their positive and negative inputs connected to eachother, but with reversed polarity. This would make sure that one output is high, and the other one is low. Why use an OpAmp? I wanted the MOSFET gate switching to go faster as usually, because in the mazzilli circuit, the gate voltage actually slews at the same rate as the LC tank's voltage slews when it crosses zero volts. In the mazzilli circuit, it actually doesn't switch when the voltage is 0v, but when the tank voltage drops below the gate threshold voltage. This would mean that you are always switching current at 5v (for example) instead of at 0V. So for these two reasons, I wanted to try switching them with an OpAmp. Measurements: Probe I on drain 1, probe II on drain 2, and GND on the circuit's ground, gives me an expected result: when switching states, at 0 voltage of the LC tank, the voltage on one side stays low (since it's pulled to ground) and the voltage on the other side goes from 0v up to 50v, back down to 0v, like a sine-wave. Then the OpAmps switch again, and the one side now goes up to 50v as a sine wave, and the other one stays low at 0v. All good, this is working just fine. Probe I on the one differential input line, probe II on the other differential input line. Since this is nothing more than just a 1/10 voltage division of the previous measurement, I'm also expecting the signal to be exactly the same, but 11x smaller. -> problem: However, this does not happen. Because of some strange reason, as you can see in the scope images: Both channels go high, Twice per cycle, instead of going high only once per cycle, and staying low for the next half of the cycle. This really isn't good! Do the inputs affect the waveform in some way? Remarks about scope images: Image: 2 gates Blue gate voltage seems 'quite' fine. Turning on looks good, turning off is not really good becuse if tends to turn on for a short time once again, before it fully turns off. Yellow gate voltage is terrible. Turning on doesn't happen as expected. Voltage drops back to 0 for a long while which is very bad for the circuit. Frequency seems fine; 50kHz is as expected with the 14µH and 6µF. Image: 2 drain voltages These voltages were measured with a 1-10 voltage divider, and thus show only 1/11th of the actual voltage. This is getting close to what I want the LC tank to do. The voltages seem quite like sine waves. I suspect that if the gate voltages would be as they should be, these drain voltages would also be perfect sine waves. The regular sine amplitude of 50V is as expected, with a 24V supply voltage, but at the moments when the drain voltages strangely drop down to 0v, as you can see in image: '2 gates', at these moments the drain voltage seems to spike over 250V!! Image: 2 differential input lines This is the image which I don't understand. I expect the same wave as in the previous picture, but only 11 times smaller because of the voltage divider. However, the voltage does NOT reach 0v while the drain voltage does, and its shape is also completely different. In this image, both channels are doing one (half) sine wave, twice per switching period. They should be LOW for half a period, as the drain voltages do in the previous image. Better quality images: 2 gates 2 drain voltages 2 differential input lines schematic Datasheets: OpAmp: http://cds.linear.com/docs/en/datasheet/1497f.pdf MOSFETS: http://www.vishay.com/docs/91262/91262.pdf Coils and capacitors: Line inductor value: I'm not sure if this value is correct. Center-tapped main coil inductance: This value should be pretty correct, I calculated it by measuring it's size and windings, and the operating frequency is also nearly the same as the calculated one. tank capacitance: 6 times a 1µf MKP capacitor Questions: - Why these strange large spikes? - Why is the waveform suddenly different when reading it near the differential inputs? For the first time ever, I can provide you with scope images! I finally bought a (quite cheap) oscilloscope. I hope it helps a lot. Oh, and one more thing: The induction heater does actually work already. I'm getting huge currents in the LC tank, since the 6mm copper tubing gets hot after a minute. Water cooling has been added, and it works like a charm! The MOSFETS do get quite hot after 15 seconds of heating an object, or after 40 seconds of heating nothing. This, probably because the gate voltage isn't what it should be. Kind regards, Electorials

Question by DELETED_Electorials 4 years ago  |  last reply 4 years ago