Instructablesss... Come Out and Play!

The Come Out and Play, a massive festival of urban gaming, is back again! And not only that, they are looking for people to submit ideas for urban games. Check it:THE MISSIONThe Come Out & Play Festival seeks to provide a forum for new types of public games and play. We want to bring together a public eager to rediscover the world around them through play with designers interested in producing innovative new games and experiences.Oh yeah, and we want to have city-size fun.We are extremely excited to announce that Come Out & Play will be returning to New York City this spring. The festival will run from June 6-8. The excellent bookstore Blue Stockings will play host to the festival and serve as headquarters. The festival will spread across the Lower East Side of Manhattan, bringing the streets to life.Games will take place in locations around New York, but will be centered around Blue Stockings and the Lower East Side.We are now accepting applications for this year's festival. - Submission deadline: April 15- Notifications: April 30- Festival: June 6-8APPLICATION :: To apply, visit and download the application form.Download directly at:

Posted by randofo 10 years ago

Instructables Stickers in Taiwan

A few months ago Instructables user Cousin Steve contacted us about printing up some Instructables stickers to hand out at a DIY event in Taiwan. We thought this was a great idea so I sent Cousin Steve the source files for the Instructables stickers. He then took some awesome initiative and translated our slogan into Chinese, printed up a couple hundred stickers, and has been handing them out to people in Taiwan ever since!Needless to say we were very impressed and excited with his work. We've told him so, and sent him an Instructables robot t-shirt to thank him for helping us spread the word about Instructables to such a far away place.If anyone else is interested in printing up Instructables stickers in their area you can download the original files below, translate the text as necessary, and print up some of your very own stickers to hand out. We just request that anyone making any changes to the designs below run them by us first so before having them printed up.Nice job Cousin Steve!

Posted by noahw 10 years ago


I remember seeing a bot (a group of bots) on TechTV many years ago (had to have been... hell how many of you still even remember that great channel) where all the master would have to do is give the first bot directions, and it would just go near the other one (IR or RF) and it would pass on the message. All he did was give one bot the midi file for the star wars theme... and the bots organized themselfs to play the song with different notes divided out. He could basically tell them any command and they would work as a team to figure it out. I don't remember what it was called... they WERE cluster bots... but I thought he called it something like bee-bots or something... I call them zombie bots, because you "infect" one and it spreads it.... They couldn't be THAT hard or THAT expensive to make, after you have the basics down... Does anyone else know what I am talking about? Has anyone developed something like theses?

Posted by teamcoltra 10 years ago

detergent feed for electric pressure washer

I know there are exspensive or maybe just newer PW's that you can add detergent to but not mine. It's just one of those hardware store 1300 PSI electric models. I'm just thinking that there has to be a way to provide some detergent to my spray. I think tapping into the feed hose with a siiphon rig would be a bad idea cuz then you'd be sending the soap through the pressure pump. It's have to be on the other end but there you have high pressure hose you might not want to cut. My thoughts flow along the lines of some sort of connector pipe comming off the output side that goes between the unit and the spray hose connector. You could make it a bit larger to hold like a dishwasher table or rig some sort of siphon hose (like a hose end sparyer) maybe. I'm not sure. My main thought isn't to use the soap for pressure CLEANING but to use the much greater reach of the pressure sprayer to spread the soap/cleaning solution farther - like up to second story siding. thanks

Posted by danneauxs 9 years ago

Seattle Makers: Make:23 Party July 23rd

Release Party for Make:23 July 23rd, 6pm @ Ada's Technical Books, Seattle, WA MAKE_V23_thmb.jpg The newest issue of MAKE Magazine (Vol 23) features Seattle's 3ric Johanson on the cover with a new weapon in the war on malaria: the Photonic Fence from Intellectual Ventures. Informally, it's a laser-powered mosquito zapper. 3ric, who also opened Hackerbot Labs in Seattle, is excited to have a day-job working with lasers. Join 3ric, other members of the Intellectual Ventures' team, and me at a Make "new release" party at Ada's Technical Books in Seattle's Capitol Hill neighborhood on Friday, July 23rd from 6pm to 10pm. 3ric will talk about how the mosquito zapper works and show video of it in action, a slo-motion high-def sequence which is pretty amazing by itself. We'll have copies of the new issue on hand at Ada's Technical Bookstore. Please help spread the word to Seattle makers who are welcome to bring a project to talk about. Details: What: Make: 23, Mosquito Blaster Release Party When: July 23rd, 6pm -- 10pm Where: Ada's Technical Books 713 Broadway East Seattle, WA 98102

Posted by frenzy 8 years ago

Hitchhikers guide to.. The Earth!

So here's the idea. I've been thinking how cool it would be to do a collaboration and create a giant travel guide. But not just an ordinary travel guide, one written by all instructables members.We have enough people on this site that we could get a pretty good start on it. I think the idea would spread fairly quickly. For example, I would write a brief something or other about my state (North Carolina), and then a full length guide for Boone, the university town that I live in. I would include basic information like population, size, etc., and also where I like to eat, what kind of tourist attractions are here, why ASU beat Michigan, etc. Some one else could add to what I wrote, and someone else could add a guide for the Charlotte/Denver area, and so on. For another state/province someone would just add a new step, etc. I realize it wouldn't be an Instructable, in the strict sense, but it would be helpful nonetheless. Not to mention we could have a lot of fun with it.What do you all think? What do the Instructables staff think about something like this? (In light of the fact that this is not a step by step guide to any one thing)Let the discussion begin. =)

Posted by drinkmorecoffee 10 years ago

[Requesting help] Need to dye a lens filter

Just wondering if anyone has any ideas on how I can take clear plastic and totally black it out I am trying to create a shaped bokeh effect in a uv filter for a more permanent setting than cut out paper (what most people do). Now I bought quite a few for different shapes or if I mess up. Last night I printed out on sticker paper a heart and placed it in the center of the filter and used Krylon fusion (spray paint for plastic) on the filter. It took quite a few coats to get it so light never shined through. When It looked good I peeled of the heart sticker and half the paint went with it. An obvious failure. What im trying now is, I took that filter and scratched it up a bit and I found some super glue and just thinly spread some across the lens (to hopefully give the paint something to grip to) let that sit over night it was too late to paint. And today I am now putting a few coats on it and i plan to actually cut the heart shape out of the filter.

Posted by Ampix0 7 years ago

Solar Generators - for emergencies and more

I've started an IndiGoGo campaign - 'Solar for Sandy' - to provide emergency solar generators to those devastated by Super Storm Sandy. I've started it because our Congress is useless.  It really, really, really bugged the hell out of me the way our Congress both disregarded and greatly delayed relief to the families suffering from Super Storm Sandy.  They made a bad situation much much more worse. So - unlike Congress - I decided to do something about it.  First, deliver mutual aid to New Jersey families with portable solar generators.  And the next time a climate disaster strikes we won't have to wait on Congress to do the right thing.  We'll route around their inaction and just get it done. I'm asking the Green Community on Instructables to join me.  Become a funder or spread the word widely so we can make this happen and provide relief.  One of the perks is a complete building manual for our iPower Station solar generator. Thanks for hearing me out - and providing a helping hand. Solar for Sandy  Excerpt from 'Build Your Own Solar Generator'

Posted by Jonlo 5 years ago

Gigantic Scrabble

Scrabble is an obsession and I can completely understand why a couple would show so much love for the game that they would make an absolutely huge waterproof version for their backyard. Yup, it's lawn Scrabble and there's nothing wrong with that.He fashioned the board from pavers laid in a bed of sand — 225 of them, to be exact. He installed them all in one day and had the back pain to prove it.Jane Crane painted the bonus square in the proper colors and made letter tiles from craft-store wood plaques. She took apart shelves and reconfigured the pieces to make tile racks, and pavers and tiles were sealed to prevent water damage.Now Scrabble games at the Crane house are a physical as well as mental pursuit. The players have to get out of their seats to place their tiles on the board and pick new ones from the selection spread out face down in the grass.They haven't faced many challenges, other than having to light patio torches when darkness falls or dealing with the few times their dog, Maggie, has run across the game board. If it rains, they just take the game inside — on a regulation Scrabble board, that is.But you know, Jane Crane said, it's not as much fun. Link via Neatorama

Posted by fungus amungus 9 years ago

instructables sticker contest

*edit July 20, 2010. Contest is now closed Congratulations to ...Dr.Paj You've been randomly selected as the winner of a 3-month Pro membership for instructables. Thanks to everyone who entered, digital patches all around! Big, yellowy-orange, friendly: it's the Instructables Robot! The diligent machine helping keep the instructables community ticking. Such a tireless robot, I wish we could shower you with D-cells to show appreciation for your efforts. Hmmm....maybe you can help... Show your love for the instructables robot In the comments below, post a picture showing where you've stuck an instructables robot sticker and you could win a 3-month pro membership for instructables! Contest is open until 6:00pm (PST) Monday July 19, 2010 at which time a comment with a picture showing the instructables robot sticker will be randomly selected and awarded a 3-month pro  membership for instructables and a digital patch. All comments with a photo of instructable sticker stuck to something will receive a digital patch. Get out there and find a surface to stick the instructables robot on, and help spread the love. *limit of one digital patch per user; digital patches will awarded after winner is announced.

Posted by mikeasaurus 8 years ago


WipeCarbon campaign designed to kick-start a million pledges from all of us which will reduce emissions of Carbon and help us to reduce the side effects in Global Warming. We are not looking for anything life changing here. Small commitments will not cost you a cent but they will make a big difference! How much does it cost to switch off your lights when you’re not using them? Or to switch off your electronics when they are not in use? These are just some of the small habits which we hope to inspire. A million of these small commitments is a big impact. Its that simple. Each pledge is one more person who cares about the planet. One more person who thinks before they buy or who considers how to reduce the energy waste in their lives. One more person who knows that global warming will not be solved by a single person but by all of us working together. This is what Wipecarbon is about. Come Let us all share and spread this beautiful message around with our loved ones and make this network a strong foundation for creating this Green Globe . Our initiative will surely make more and more people to drive towards it and take this pledge Million of these commitments will make it a ocean and create a beautiful globe joining hands with us.

Posted by wipecarbon 10 years ago

Anti-fog Mirror System

First of all, thanks to this comunity and all the DIY it has. Its a great group and has many interesting ideas. This is my first post, after one week reading all the projects, so hello to everyone. I want to make an anti-fog system for my bathroom mirror, because every time I bath it creates fog and makes difucult to shave after. I know about anti-fog sprays and DIY detergent solutions but there is also an electrical solution. The one I have in mind is a wire attach to the back of the mirror and conected to the electricity, so it generates the hot enough to avoid the fog. I saw one that also covered the zigzag wire behind with aluminium foil to (I thinkk) spread the heat more uniformly. What for sure I don't know, is about anything I should put to transform the electricity and resistance or whatever, because I thinks I can just conect the wires alone behind it. Can anyone help me with this? Two more things, in my country (Argentina) we use 220 voltage current instead of 110 like USA. Second, excuse my english and mistakes as it is not my native language. Thanks in advance to all the comunity !!!!

Posted by cbasualdo 8 years ago

Ring a bell? (Special event for British members)

The Olympics are coming, and although I will miss most of it, it would be cool if I could take part in some way. It turns out I can, and so can every other Brit reading this, in an event called All the Bells. The short version is, on Friday 27th July, at 08:12am, UK time, as many bells as possible, from doorbells and bike bells, all the way up to full cathedral bell-towers will ring, all across the United Kingdom. Taking part is easy - just stand on your doorstep and press your doorbell - but why not go the full hog?  Are you in a cycling club?  Get them all out in the street, ringing their bike bells. Live near a church?  Even if you're not religious, get in touch and get them involved. Go to school?  Talk to the music teacher, borrow the hand bells or the tubular bells. Are you an engineer?  Hang up the biggest lump of steel on the site, and beat it with a hammer. Heck, just get all your friends to set an alarm on their phones and iPods with a bell-tone at 08:12, or turn up your PC speakers and play with sound effects. Pass the website around your friends and contacts by Facebook or Twitter, put a poster up at work, add graphics and links to your blog, and generally spread the word. [BLOGGED]

Posted by Kiteman 6 years ago

Dazzling White

Everyone should beware of the teeth whitening ads on Instructables.  One of the advertisers, Dazzling White, is a fraudulent company which, once they have your Credit card number, will continue charging your credit card forever.  If you complain, they say they will send you an email to opt out but you will never get the email.  They will charge your card in advance of sending you their product so you will get billed 2 or 3 times before you ever get anything. Their offer is a "trial" sample for which they will bill you something like $8.  If you read the small print, which no one ever does, it says you have to cancel within 10 days of receiving your trial else they will charge you the full $80+ dollars, will enroll you in their "program" and start billing you $80+ every month. I had to get my credit card company involved in order to get them to cease and desist.  No amount of pleading with them on the phone will work.  They claim to abide by their "terms and conditions". I've been on the Internet a long time and this is the first time I've ever succumbed to fraudulent activity of this magnitude.  I'm out $160 that I will never get back. Instructables!!!  You need to get these crooks off your site.  It's giving you a bad name. If you search the Internet, you will see hundreds of complaints about these crooks. Spread the word!

Posted by whatshisname 8 years ago

To be or not to be upset

So, with recently finding out that tons of people's instructables had been published without their permission on a paid subscription site, I decided to google my username and see if anything came up. This is obviously something everyone should do from time to time, and I figured it was time to give it another go. In the image search, I found an image I didn't recognize and clicked until I found the source of the connection to my username. A seemingly reputable website has written an article on one of my ibles. At first, I was excited. It was cool that someone saw my work and thought it cool enough to write about it. However, that joy turned to turmoil when I realized that the article wasn't a short description accompanied by one or two images. It is a full rehash of my ible. Basically, anyone that sees the article can follow the links to my version (there are several), but the author of the article has really not given them any reason to do so. They've taken most of my images to re-write my ible without asking or notifying me. They didn't break the CC license by writing their own version, but I believe they did when they took all my images.  What do you think? Would you be upset and ask them to change or remove the article, or chalk it up to promotion and be excited to see your work spread? By the way, there have only been 138 hits on my ible from that website. The article My ible

Posted by Brooklyntonia 3 years ago

AirDog: World's First Auto-Follow Drone for GoPro

Hey everyone! I wanted to tell you about this new awesome thing called AirDog. AirDog is the world's first auto-follow drone for GoPro camera that follows and films you autonomously, so you don’t need to rely on filmmaking crew to get breathtaking views. Forget about remote control operation – Airdog is a unique solution for action sports or anything else you wish to film without actually holding your GoPro. Here you can see our AirDog in action: Have a look at our Kickstarter page: It would mean a world to us if you could support it or spread the word on your websites. Let’s make a revolution in drone-made photos and videos together! There are four major AirDog advantages: 1. It is tested and working prototype ready for production. 2. It will be the first commercial product of its kind in the market from November 2014. 3. It has AirLeash - waterproof GPS device tracking your movement with a significantly better signal than smartphones. 4. Two years of R&D; invested into the creation of a working prototype to get the best possible solution. We'll be thrilled to hear from you! If you want to know more, don't hesitate to ask us anything - Best regards, Dita Team Airdog

Posted by AirDogdrone 4 years ago

Powering LED array with 12V AC/DC converter?

Hi! Long time lurker here! I have a project in mind that involves the construction of an array of 121 LEDs in an 11x11 configuration. I want to power the LEDs off a 12V AC/DC adapter, but I'm a little unsure about how current works in this case. The adapter is a regulated 12V 1A adapter. The LED array, however, needs only 820 mA. I know the maximum DC current is 30 mA so if the full amp is spread across the 41 parallel series it should be passing ~24 mA through the LEDs. Will this cause any major problems? Is there a way to limit the current to the suggest 20mA? Furthermore, if anyone has any good ideas as to how to mount 121 LEDs in a square grid of inch spacing, I'm all ears. I considered using pegboard, but I can't seem to find any, and veroboard large enough is also proving difficult to source. I don't really have the resources necessary to make my own PCB. Maybe I could drill some pegboard of my own and attach some thin conductive strips for the 12V and 0V rails. Thanks for any help! I've taken a practical electronics course at university and done some soldering (just op-amps and the like), but this is the first real electronics project I've taken on, so any help is greatly appreciated.

Posted by headphoned 9 years ago

I'm back. Kind of...

Hey guys, it's MotaBoi and im just saying, I'm back.  Kind of, I still don't think I'll be making anything with k'nex anymore or what I will be posting.  I wrote to the moderator and he told me I could have my account back if I wrote 2 apologies and you guys accepted them.  One to Kevin, and one to the community.  Here's my apology to the community, and I will send a private message to Keven about my apology.  I wrote these before and I asked the moderator I talked to to post them for me, but he didnt really do anything about it. Hey guys, it's me, MotaBoi. As some of you may know kNeXFreek has recently come back to instructables and a few of us decided to play a practical joke on him by changing our display picture to something very offensive to him. I know some of you must be mad at me for doing this and I'm sorry. Why I'm apologizing to you guys like this now is because I need you to all forgive me so that I can have my account back. If you guys can forgive me and want me to be able to be back on ibles, please say so so that I can have my account back PS. If you have any questions about my guns or anything, post them to my OB so that I know, and spread the word!

Posted by A_HUNGRY_APE 8 years ago

Working SRv3 and Directional Mine Prototype

I haven't had the time to work on the SRv3 in a while so here is what I am thinking of doing. Let me know what you think. I want to release an ible on what I have built up to this point. Which by the way is a working shooting gun that shoots exactly how I want it to I just need the body, front, grip, stock, and bi pod to be designed and built. If you build what I present your SRv3 will shoot 500ft. What do you think? I want to make this gun a collaboration of design ideas so we can all build the gun as a community. Let me know if this sounds fun to you all. If so I'll post pics this weekend! 08/11/2013 Pics of both my working SRv3 and Directional Mine Prototype coming soon! Just a few fun stats of the two. The SRv3 has been recorded to shoot over 500ft and is extremely accurate. The Directional Mine launches 25+ K'nex green rods over 50ft in a nice spread pattern that can be activated by both trip wire and pull cord. Both are shooting great and are extremely fun to use! I hope to get a video and ible/forum up soon showing how to build both and how they preform! 08/14/2013 Go check out the Directional Mine Prototype on my ible NOW!

Posted by Knex Lego Maniac 5 years ago

Very Strange Error??!!

Ive began to receive some annoyingly strange error messages when trying to access hard drives/ removable media, the error message appears when trying to open it from 'my computer':"Windows cannot find 'recycler\'. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search."Every time i try and open SOME of my storage it says that, when right clicking and clicking open it says:C:\Access is denied Also when i go to 'Run' and type in "recycler\"the very same message appears.It has also somehow spread to another computer in my house, although the program (Edited by me) i think has caused this has not been ran on the other computer: on Could somebody check that out for me?? (ps3sixaxis_en.exe, other files *.vbs, ps3.exe are mine)"" was also at one time on the processes list in Task Manager....Also only some drives were coming up with this error but after a while they where too?? I have no idea on how to remove this and its beginning to get VERY annoying.. Thanks Kieran

Posted by k_man 9 years ago

Farewell my robot army

Dear Everyone (and you know who you are), The time we've spent together has been unforgettable and I think you're really swell, but I'm afraid it's time for me to move on now.  You've always been there for me, supporting my every effort, from cheeseburger salads and microwave cakes to turning Care Bears into a coat.  I love you for that. While in your tender, sometimes tempestuous, embrace, I've grown and blossomed from a green intern to the editor of your food and living channels, and you've rewarded me with your support, comments, and continuous inspiration.  But now it is time for me to spread my wings and move on to new territories.  I will always appreciate everything you've done for me.  I will still be here, lurking in the forums, popping up in your recent feed, featuring your awesome projects, and occasionally feeding you a new recipe of epically unhealthy proportions or gratuitously kitten-themed craft project.  So this is cheerio, but not goodbye. I hold all of you in my heart, and I am not going far.  You will find me just across the internet at, turning a new group of people's ridiculous concepts into ridiculously popular products and trends, just as we always have here. So be prepared for a stream of disco-fabric and other related Instructables as I transition into my new role managing the Thinktank division and test out new product ideas.  I promise not to stop making cupcakes, or putting bacon where it doesn't belong.  Be well, do good, and keep making awesome projects. All the best, Sarah

Posted by scoochmaroo 5 years ago

knex rideable roller coaster with mr.muggles chair (big build 2010)

Ok then when you read this you may die of shock so i am going to tell you the bad things before so you dont get to shocked by what it is. 1.its not very long 2. it uses lots of pieces 3. it sticks and doesnt run smothely along the track 4. theres no bumpers so you can fall of. i thinks thats all of them so now i will tell you what it is. its a rideable knex rollercoaster ( a roller coaster you can ride on) now thank mr.muggle as i used his chair and have his permission to use it in this forum. you can proberly build the track and the new base oof the chair from the pictures. you dont have to change the top of the chair to how my one is(my back rest is like that because i got bored building it and was low on pieces).i could of made the track longer but i was getting bored of making the same thing and couldnt be asked to continue. im not sure how much weight it can hold so be careful and spread out all of your weight when onboard. ps: this message is to visper123,as i told you its not a car and its not a whatever that other thing was and you didnt hack my webcam and i dont have a webcam and my school bag is green (to everyone that doesnt know what im talking about then go and read the comments on the sneak peak), so there. 

Posted by slithien 8 years ago

What is the safest (and most reliable) way to power a dozen LED's burried in a floor?

I know sculpting and carving, not circiuts! I've added some custom glass etchings to the tile floor in a bathroom that are lit with LED's embedded under the Travertine and Grout. There are about a dozen 3v White LED's spread throughout the floor and all wired in parrallel. They are hard to change. Once they burn out, they most likely won't be dug up and chaged, so I want them to last as long as possible. In my previous installation, I simply used a 3v battery pack inside the closet with a wall switch in the entry to control the circuit. In my current floor, I've also used a battery pack to test them and am now ready to build a permanent solution. This time (thinking ahead) I have built a switched outlet in a wall cavity that will provide power to my floor lighting. The question is this: What is the best way to power them making use of the switched outlet? My original idea was to simply buy a 3v wall wart power supply typically rated at between 750 and 1000ma at the switched outlet. The reason I'm asking you fine folks about this is that Im concerned about providing too much amperage to the lights and burning them out (if that's possible). Once they're gone, theyre gone. It is not very practical to dig them out. Is this a good idea? There is nothing else in the circuit but the 3v LEDs and the power supply (no resistors, etc). My backup idea is to use a 120v relay and a battery pack at the switched outlet. This seems the safer solution (less chance of burning out the LED's), but would require changing the batteries once in a while (probably every couple years with typical usage.

Posted by briankangaroo 9 years ago

Music Managment Soloution ?

Hello Ok, i have a problem. My iTunes library has 1200 songs in it, not a massive number i know, But the thing is all this music is spread over so many genres and many time periods. Personally i think the way we view music is appalling, iTunes looks like a spreadsheet, my playlists are alphabetical and i cant reorganise them. Its a very boring system and for a creative person its almost impossible to find, group and remember what i like and what i want to listen to. Anyway i cant change that. So my problem is as i have grown up I've been through a number of phases. I used to like rock then heavy metal, briefly pop, then rock and now for the last two years I've been very big on electronic. I love everything about this genre and its grown massively since i have grown up. Now I only like a few of the old rock songs. Its really annoying trying to navigate this library, since all my music is mixed up. ACTUAL QUESTION Do i go through my library and keep all my favorite songs, deleting everything else ? or... Do I keep all the music I don't listen to and invest alot of time into constantly managing the playlists, and never use shuffle ? BONUS QUESTION How do you manage your music, and do you listen to one genre or multiple ? Hopefully soon someone will design a visual, personal way of listening to music, because i'm not an accountant, and my music isn't financial data...

Posted by =SMART= 8 years ago

Wireless Power Transmission

Nikola Tesla's grandest vision was the transmission of large amounts of power without wires. His work in this area was abandoned by his contemporaries, and there is still much debate over if it could or could not work. I would like to hear your opinions on this. Do you think it is possible? Would it require only one transmitter, or several, spread across the globe? Would it be safe? Would it be worthwhile? Could Tesla's original spark gap circuit been sufficient to drive it? Or would it be better to use vacuum tubes or solid state setups? Would the operating frequency be very high or very low? Pictured below is how I think Tesla may have done it, based on the information I've seen. It's a bit over-simplified, but to the best of my knowledge, it covers most of what is needed. Please note that, although the transmitter terminals would be at a much higher elevation than pictured, the receiving terminals could stay at a relatively low elevation. This link is to a YouTube video of someone using a small Solid-State Tesla Coil for wireless power transmission: Edit: I had orriginally imagined that the system would work by capacitive coupling between the Ionosphere and the coils. Afterwards I realized that electrostatic capacitive coupling will decouple after seperation between two plates is greater than 1/2 the wavelength (or, at least in theory), so I personally abandoned the idea. The only problem is that I can't imagine how power would be sent to airplanes. Also, this is a very good read on the subject, from a very interesting site:

Posted by ElectricUmbrella 8 years ago

I've picked a "starter set" of LEDs and accessories - Looking for advice

Hi Everyone... I'm looking to get into a bunch of random LED projects so I need some LEDs and various accessories. I've done soldering and such in the past, so I have a soldering iron (cold heat) and solder and flux... but I'm wondering if this is a good set of starter equipment and if the prices are decent...any suggestions or comments are welcome...(all items are from LED - 20 Degree Clear 9000mcd - 20 count - $7.60 (unit price is 0.99 under ten items)Red LED - 20 Degree Clear 14000mcd - 20 count - $9.80 (unit price is 0.50 under ten items)Pure Green LED - 20 Degree Clear 30000mcd - 20 count - $9.00 (unit price is 0.56 under 10 items)Ultra Violet LED - 20 Degree Clear 400-410nm - 20 count - $7.00 (unit price is 0.35 under 10 items)5mm Red Piranha LED (This is a wide-spread LED with 1000-1500mcd output) - 10 count -$5.00 (unit price is 0.62 under 10 items)Set of 10PCs 3mm Plastic LED Holder - $1.50 (50 cents for each 10 pieces, ordered 3)6 inches of Heat Shrink - $1.90 (19 cents for each 6, ordered 10)100 ohm 1/4 Watts Resistor - 50PCs - $0.50220 ohm 1/4 Watts Resistor - 50PCs - $0.50470 ohm 1/4 Watts Resistor - 50PCs - $0.50I didn't order any wire because I figured I could just pick that up anywhere around here.Total Cost - $43.30Shipping - $5.50Grand Total - $48.80

Posted by Sirckus 11 years ago

Knex guns aren't so bad, give them a chance! (non knexers only)

This is directed at non-knexers, don't bother reading it if you're already a knexer.  So I've been noticing more knex gun hate comments from other non knexers.  Why?  It's like us hating on hacking/modding/making/whatever it is you non knexers do.  It's no different.  If you want to complain about the number of knex guns out there, why not take a look at the number of hacks/mods/how to builds out there?  Like I said, it's no different. Give knex guns a chance, I sure did, and I'm better off now than I would be without the knex guns.  It's helped me be more creative, it's helped me gain more rep at school (Some guys at school found my Youtube account, and they love the guns, they think it's beast mode, especially the TR vid, since then, my account has spread like a rash). Personally, I think the reasons why knex guns are so popular here is because it's fun building and shooting them.  I consider building a gun to be half the fun, shooting it in a knex war or something is part 2, and I find something like this even more fun than say, airsoft or nerf, because of what I mentioned a few words ago. I find it funny that most of the people preaching out against knex guns haven't tried to build or use one in any way.  That's like me saying that a certain product is bad without me trying it or anything similar to it.  I'm not saying this to flame/critisice/hate on or whatever, I'm saying this to promote a hobby I enjoy, I'm sure you all can relate to that, right?

Posted by DJ Radio 8 years ago

Tell me more about nuclear power as source of electricity.

Hi !Fishes can't see the water they are in ! That's why I need your personal and external opinions and view.The first source of electricity in my country (France) is nuclear.In a previous forum, I've noticed that a lot of Citizen of USA consider Nuclear energy is too much polluting and too much expensive (democrats candidates for US election reject the idea of more nuclear plants), and that it's not seen as a serious solution to reduce pollution and CO2 emission, etc ... In few words : you seems to dislike it. So, I would like to know why exactly, and that you tell me more about what you think about it.Here it's quite different. Nuclear energy is seen as a mean to be energetically independent. It's a mean to pollute less. And it's almost a local speciality, like are crepes, baguettes and croissants.The main producer is EDF (which stands for Electricite De France (electricity of France)). Until 1999, EDF had the monopoly (and that was better and safer IMHO). Since then, because of EU regulation, we've been forced to open the market ...Here are some data :EDF is one of the world's largest producers of electricity. In 2003, it produced 22% of the European Union's electricity, primarily from nuclear power:nuclear: 74.5%hydro-electric: 16.2%thermal: 9.2%wind power and other renewable sources: 0.1%Its 58 active nuclear reactors (in 2004) are spread out over 20 sites (nuclear power plants). They comprise 34 reactors of 900MW, 20 reactors of 1300 MW, and 4 reactors of 1450MW, all PWRs.---In 2006 :- nuclear : 85.7%- hydro-electric : 5.0%- thermal : 8.1% ( coal : 3.3%, gas : 3.2%, petrol : 1.6% )- others renewable : 0.9% (wind, sun and co)- others : 0.3%---

Posted by chooseausername 10 years ago

Austin schoolteacher who didn't believe Linux existed

From linuxlock:A teacher in Austin who threatened to report a local free-Linux-machines charity to the police because "there's no such thing as free software" and they had therefore deceived the student she caught distributing Linux disks in class.The teacher sent an email to the blog, which sparked this whole incident.The teacher's initial email: (Thanks, gmoon!)After confiscating the disks I called a confrence with the student and that is how I came to discover you and your organization. Mr. Starks, I am sure you strongly believe in what you are doing but I cannot either support your efforts or allow them to happen in my classroom. At this point, I am not sure what you are doing is legal. No software is free and spreading that misconception is harmful. These children look up to adults for guidance and discipline. I will research this as time allows and I want to assure you, if you are doing anything illegal, I will pursue charges as the law allows. Mr. Starks, I along with many others tried Linux during college and I assure you, the claims you make are grossly over-stated and hinge on falsehoods. I admire your attempts in getting computers in the hands of disadvantaged people but putting linux on these machines is holding our kids back.This is a world where Windows runs on virtually every computer and putting on a carnival show for an operating system is not helping these children at all. I am sure if you contacted Microsoft, they would be more than happy to supply you with copies of an older verison of Windows and that way, your computers would actually be of service to those receiving them...Original Article which started the situationNew Article that clears things up

Posted by Keith-Kid 9 years ago

What you getting for Christmas?

EDIT:  Wow so its christmas!!!! WOO HOO! Did you get what you wanted? If not what did you get? I was actually suprised at how popular this topic (22 Including my shared their present) was so I want too say thankyou to all who commented and have a Merry Christmas! Ps: I got my Itouch 4  :) ANYONE ON IBLES REPLY TO THIS Please spread around so i have a huge list! Here is the list: megametal8: Apple Ipod Touch 4th Gen 8GB lemonie: Drunk DJ Radio: Xbox with Halo Reach Randomguy65: Kinect and (Possibly) Ipod Nano Goodhart: Three books of inspiration Seleziona: PS3 Shadowman39: Lego H1T4TCH1: Money TheFoofinator: Digital Camera MichelMoermans: Hat,Money,Building Supplies and a Book. knex_builder_freak: Ipod touch protective case and knife or sword bounty1012: L96a1 instruct39: Clothes,knex and wii games Ajleece: Samsung 330w Home Theatre System Tool Using Animal: A scout scope mount, and scope, for my Mosin Nagant happyjo: Trip to Hawaii Tornado96: New Super Mario Bros Wii, Video Camera and (Hopefully) more Knex stale56: A few video games,Tarn-X,IPod touch External Mic,Xbox 360 controllers,Cheap laser pointers, Flash drive and Duct and Electric Tape. knex gun builder: 2 RC Helicoptors, Suprise, Wii headset and Remote BrittLiv: A trip to the hard ware store SunBanks: Cahartt Jacket gruffalo child: A geiger counter, loads of books, some random things from her grandad's workshop, a hand-knitted jumper, ice-skates and a lop-sided picture

Posted by MegaMetal8 7 years ago

So it's almost the college holidays, and i'm looking for something to do....

So, obviously, i'll have very little to do in the hols, so i've decided that i'll make my new forge (more and wider-spread heat) throw an anvil together, be it a railroad track anvil or whatever, and get busy. I've got a biiig project i'm going to sit on for now (instructable on the way, but there's LOADS more work to do before i'll consider posting.) but after that's done, i'll make something and apply what i've learned to some new stuff I thinks maybe a kerambit, perhaps...and a dagger, some stillettoes....arrowheads.....i'll work something out But what about the opinions of the esteemed community of instructables? think i should do this? maybe i'll get to selling some of these some day, tho i'll need more practice, first, but i think that as a hobby, it makes me happy SHOPPING LIST: Anvil thing Bits for forge Steel (5160's good) Grinding Wheels (starting to wear down a bit now. these wheels've taken everything i can throw at them, but they're shrinking steadily....maybe i might buy me a belt grinder, hey, anyone know what the average price for an average grinder is?) Air Blower That isn't Crap--i axed the last one to hell-- Any ideas? fan in a box, perhaps? both hairdryers i've used were crap. both ended up in pieces. Actually, i like the idea of making a kerambit, seems a nice, sort of challenging thing that'll look good, but, like most of this post, that's a digression. Werl, when i do makes these stuffs, i'll either post an instructable (prob. not for the forge. there;s enough forge instructables) but almost certainly for the rest of the stuff V

Posted by Vendigroth 11 years ago

Screw TED - come join BIL!

The cognoscenti among you may know about the upcoming TED conference in Monterey, CA this week. TED is a prestigious, invitation-only, $6000/person gathering on Technology, Entertainment, and Design (TED - get it?), and attracts hordes of Really Cool People, such as Craig Venter, Amy Tan, Al Gore, Louise Leakey, Ravi Shankar, Phil Zimbardo, Bob Geldhof, etcetera, etcetera... About 1,100 people are expected to attend TED. This year's conference theme is "Big Questions," and speakers will be looking at core issues like who we are, where we came from and what our place is in the universe. ( WIRED)Of course, the vast majority of you will have no chance in hell to actually be able to attend TED, and meet any of these Really Cool People. That's why this year there's an alternative for the rest of us:BIL! This weekend, March 1-2, Monterey, CA(Stands for Breeding. Intelligence. Lounge.)BIL is an open-ended gathering designed to complement TED, and begins just after the closing beach party that ends TED on Saturday. Bil, loosely organized by Princeton University student Marshall Reaves, does not charge attendees but conference goers must create their own roster of speakers -- anyone who shows up at Bil can give a presentation there. The list of scheduled speakers includes some current and past TED presenters. ( WIRED)To quote their website: Our event is self-organizing, emergent, and anarchic. Nobody is in charge. If you want to come just show up. If you've got an idea to spread start talking. If someone is saying something good, stop and listen.If you're interested, sign up on their wiki, bring your own folding chair, your laptop, a cell phone and show up...

Posted by Patrik 10 years ago

Help me build stadium lighting for my foosball table

I work at a little marketing/web agency.  The job is sweet, but the foosball is epic.  We have internal league games among the 15 of us, but we're going to go intercollegiate this winter and the foosball table need some polish.  I think some epic stadium lights would fit the bill nicely.   Here's some parameters I'd like to work within:  * They should look as close to the real thing as possible - no shortcuts when it comes to the aesthetics (Google images here). * They will probably have to hang from the ceiling. * They should be bright.  Not necessarily blinding, but brighter than average.  Definitely not feeble. * I'm thinking 2 sets hanging above either end of the table and safely above head-height.  That probably puts them about 4-6' away from the surface I want to illuminate. * We can probably spend $40-80 on materials.   * I doubt we will be doing any electrical work to accommodate these, so each one needs to run off a single, probably very long, cord.   The real crux for me here is the lighting - I'm really not familiar with lighting.  I'm sure I'm looking at LED lighting, given that I want to have many lights working from a single power source, but I'm worried that after I spread the available watts out over a large number of lights I won't be able to get the kind of intensity I'm looking for.  And I'm wondering how much I would need to spend on the kind of light that I need for this project.   I'm imagining that the frame of the light will be some kind of small diameter metal conduit.  I'm not sure what the best way of linking the conduit together would be though.. Ideas are warmly welcomed   : )  Cheers, Micah

Posted by sing1ejack 6 years ago

Carburettor Heater - need help

Hi All, Hope this is in the right section. I am working on a project to heat the body of a carburettor (Bing 84) in order to prevent carb icing.  No commercial solution exists for my carburettor.  My engine (for paramotoring) is air cooled so can't use water from cooling system. My idea was to strip out the nichrome heating element from a car cigarette lighter and use that.  The heat needs to be applied to the metal casing of the carburettor, preferably being hottest near the air intake side of the carb.  I decided the best place was where the air filter is attached - a 12mm long metal throat with a 35mm diameter The trouble is, I don't know I can transfer the hundreds of degrees of temperature from the nichrome to the metal body of the carb without just shorting out the battery.  If I am to have a layer of insulation between the nichrome and the carburettor, what can I use that will conduct heat but not electrical current, and withstand around 300 degrees of heat?  I also thought about reducing the current and spreading the heating over a larger portion of the metal casing, which would allow the temperature to be lower. I have also been experimenting with motorbike hand grip heaters that run of 12v but they don't generate enough heat - I need to be pumping in around 8-10A as the internal cooling effect of the fuel vaporising rapidly causes sub zero conditions inside the carb even when the outside air temperature is well above freezing.  I have a 7Ah li-ion which I would only switch on when required (maybe have a latching push button on throttle control). It may not be doable but its an interesting project nonetheless and something I am going to play around with.  Any ideas? Thanks, Dug

Posted by dugaldcurtis 6 years ago

What i've been up to: the bolt action, bullpup, tube mag, pump action, dual shot, sling repeater. Got your attention yet?

Ok, for those of you who had seen my shotgun design, you could probably tell it was over before it had even started.  I had tried 5 different layouts and I couldn't get past the frontmost barrel without running into problems.  I think it was a cool design, but it was just too much for K'nex. Most of my best get designs just pop into my head at the most random times.  Is it just me, or does this happen to other people too?  Anyways I was trying to make it until the bell in pre-cal (my teacher is a crazy cat woman who enjoys talking about her imaginary husband) and I just started drawing this design.  Not only did it kill 10 minutes but it may just be the best thing I've come up with in terms of K'nex. The magazine looking thing in front of the handle is actually the driving mechanism in this gun.  Shots are housed in the stock pressing up against the pusher.  When the pump is pulled, the pusher moves down, allowing two bullets (one shot) into the chamber.  When the pump is released, the pusher pushes the bullets up against an upper section, where they wait for the trigger so be pulled, releasing the ratchet and the rubber band, launching the two bullets with a decent (I hope) spread.   Even though it doesn't shoot yet it is fun to just load the ammo (thats just how cool this gun it).  It is probably going to be a little different than what is shown in the video by the time I post it, but right now I'm just going with what I have.  I hope you like it and please let me know of any improvements you can come up with. -Kinetic

Posted by Kinetic 8 years ago

Bazaar Bizarre Maker Faire Vendor Applications Available

Attention crafters!Want to sell your wares at this year's Maker Faires as part of Bazaar Bizarre? Here's the info.The Bazaar Bizarre is a juried craft fair that selects vendors based on various elements such as:IndividualityDIY-sensibilityQuality of workDiversity of ProductsMAKER FAIRE AUSTIN DEADLINEApplications are being accepted from July 12th to July 29th 2008. You will be notified as to whether or not you are accepted by August 5th 2008.SAN FRANCISCO DEADLINEApplications are being accepted from July 12th to August 15th 2008. You will be notified as to whether or not you are accepted by August 21st 2008.Where and When Is This Event?Maker Faire Austin is a two-day event being held the weekend of Saturday October 18th & Sunday October 19thThis Bazaar Bizarre event is happening as a part of Make Magazine and Craft Zine Maker Faire Austin 2008. The entire event takes place at the Travis County Event Center and Fairgrounds drew over 20,000 attendees.Please see for more program informationBazaar Bizarre San FranciscoSunday November 30th 2008 10:00am - 5:00pmWhat promotional opportunities are available?Cross-Promos, Giveaways and Advertising opportunities may be available. Email us at if you have any interest participating in these kind of opportunitiesAre you looking for volunteers?Yes! Please contact us for more info at sf_info@bazaarbizarre.orgPlease put VOLUNTEER in the subject title.Please go to application pages for more information.Maker Faire Austin APPLICATION LINK San Francisco APPLICATION LINK Thanks again for all your support! We are excited to put on these events and look forward to reviewing your application! And please help us spread the word about Bazaar Bizarre and Maker Faire!Bazaar Bizarre Organizers

Posted by canida 10 years ago

How to Make Lanyards yourself?

Creative types may be curious to learn how to make rubber bracelets. If you are able to follow simple directions you will be able to produce your very own ones for personal use or to give as a gift. Whether for yourself or a as a gift, it will be a great way to secure your keys, cell phone, badge, or whistle.In learning how to make lanyards it is important to choose the right material. A popular making material is a thin, elastic, and flexible plastic lace. It is readily available at most craft stores and referred to as craft lace, , gimp, or boondoggle.There are many different stitches that can be used to make or braid . Many braiding techniques are complex and time consuming. One of the simpler braids is referred to as a crown (or round) knot. One must utilize patience and follow directions carefully in learning how to make rubber wristbands. The basic crown knot is as follows:1. Take two strands of craft lace, fold them in half together (length will depend on the type of lanyard) and tie a knot toward the top to hold them securely together.You now have four strands secured at the top. 2. Spread the four strings apart, separately, pointing in each cardinal direction of a compass. Hold the left string with one finger (close to the knot). At the same time, pull the left string over the top string. 3. Cross the top string over the right string. At this point the top string is covering both the left string and the right string. Now cross the right string over the bottom string. Finally, cross the bottom string over the left string and tuck it under the looped top string. Pull each end of the four strings extremely tight to make the first knot. Continue crossing the strings in the same manner until the desired length is reached. The knots will produce a rounded href="" target="_blank">silicone bracelets4. Do you think it a good way to make a gift to convey your sincere feelings?So, let’s do it now!

Posted by honlin 9 years ago

Drones, not just for spying

So with the advance of 3d printing, arduino firmware, Raspberry pi, and the general open source approach to making things in the last 15 or so years, it's really not that surprising that drones have become as wide spread as they are. Those not interested in drones view them mostly as either a hobby or a potential threat to their privacy, but I had an idea the other day that might push them into better prominence.   What if drones could be used for construction and basic maintenance?  What if a quad copter was the thing that was wiping down the windows of a skyscraper?  Or messing with dangerous high power electrical lines.... Things that are both tedious because they have to be done over and over again, and that are moderately dangerous for a human being to perform.  Why can't a drone be used for some of that, and can one be designed around those constraints?  This is how a hobby user could make innovations that might curtail some of legal and general paranoia surrounding drones.  This is all well and good, but let's take this a step further: Drones are a necessary part of human exploration.  People talk about putting humans on Mars.  Human beings require inputs. Food, shelter, air.... those sorta things.  If there's a problem with one of those things on Mars, there has to be a way to fix that, and it's probably best if it's something that's established before those humans get there.  Drones could be used to do a variety of tasks, and possibly even establish small caches of water or maybe even limited quantities of iron. Maybe even something like a 3d printed iron shelter.... (Induction heating works by pulsing a electromagnetic coil with high frequency electricity, which can be used to melt magnetic metals with high degrees of efficiency. This could be used to make low grade steel on mars, but if time and scarcity of resources aren't constraints... it would work.) Anyway... I was just sort thinking about this stuff. Let me know what y'all think

Posted by Qcks 3 years ago

Nottinghack, upcoming Hackerspace in the middle of the UK

After the recent Makers Faire, I added both Mitch Altman, and Jimmie Rodgers to my Twitter follow list, I noticed they had been doing rounds of various Hackerspaces in the UK. My first thought was 'Wow, I did not realise there were hackerspaces over here', I knew of Noisebridge over in San Francisco, and a few others. Both Mitch Altman, and our very own Rachel were both founding members of Noisebridge. It sounds like a cool place to be involved with. My second thought 'I had better google, and see if there are any near me!'. I googled, and eventually found one near to me, in Nottingham, called Nottinghack. It would seem Nottinghack is very new, and has only had one preliminary meeting so far. The first proper meet up is this Wednesday 24th March. I am hoping to go along! As the group is fairly young, I thought I should put a topic up, incase anyone nearby could also make it. From the Nottinghack website, What is Nottinghack? A Nottingham based group for hackers, makers and crafty creatives! What Hacking isn't! NOT to be confused with network hacking, identity theft and computer virus' spreading etc.... Nottinghack does not condone anything illegal... Hardware Hacking is a creative, educational hobby! Who is it for? You'll probably be interested in electronics, robotics, DIY, hardware hacking, photography, computing, reverse engineering, prototyping, film making, animation, building RC vehicles and other creative challenges and projects. You'll be looking for a group who can share tools, techniques and time... pool resources for bigger projects, get funding, discounts on kits and components and start classes... maybe rent a space for you to use! Where? Meeting at a Nottingham City Centre venue with WiFi and plenty of space... initial meetings for planning. Get in touch now and be one of the founders! Nottinghack's Meet-up page Nottinghack on Twitter

Posted by gmjhowe 8 years ago

Buy the Official Instructables Card Game NOW!

Top Trumps is a card game of chance, knowledge and skill. A fight to the death to posses the whole of a deck of special cards. This version of the game replaces the classic cars, aeroplanes and tanks with you, the instructables community! The following steps explain why we did it, how we did it, how you can get some and how to play. This collaboration was brought to you with massive help from gmjhowe, Lithium Rain, Kiteman, Yokozuna, KentsOkay and Lemonie. Video starring gmjhowe and rainbowhan. We wanted this project to be open to as many people as possible! For that reason you have two options to get hold of some instructables top trumps to play with your friends, family, colleagues and other instructables lovers! Buy 'em: If you'd rather have some nice glossy, double sided, rounded corner, professionally printed card cards, printed by gmjhowe at his UK print shop, click here to order a pack using Paypal. They're 10GBP/15USD/11.5 Euros. All profits after paying for materials and time go towards our Instructables stall at the Newcastle Maker Faire 2011. Check back here in a few weeks to see how much we've made to go towards spreading the Instructables love at the UK Maker Faire. Print 'em: Once we've sold 100 packs of printed cards to raise money for our Instructables table at the Maker Faire UK in 2011, a pdf will be added to this step so you can print your own! Please add your ibles username as a note in the paypal payment 10 GBP ~15 USD ~11.5 Euros What are you waiting for? Buy a pack now! Help support the Instructables Makers at the UK Maker's Faire! All profit made from sales will go directly into our stall, and projects for the makers faire.

Posted by gmjhowe 8 years ago

oschene - The Spiral Data Tato -- A Curiously Complex Origami CD Case - Universal Laser Cutter Finalist!

To see who won the VersaLaser, read the announcement here.oschene was a finalist in the 2008 Instructables and Universal Laser Cutter Contest for:The Spiral Data Tato -- A Curiously Complex Origami CD CaseShould this project win the grand prize VersaLaser laser cutter package from Universal Laser worth over $15,000? Help us judge the contest by rating this forum post! Audience votes will count for 20% of the total. Check out all the finalists, and vote for your favorites!This is a forum post created by the Instructables staff on behalf of the finalist. First of all, let me express my delight to be included in such a group. That something as ephemeral as an origami model should be considered alongside phaser pistols and solar furnaces is, to my mind, an accomplishment in itself and speaks to the breadth of interest of those who belong to this site.What would I do with a laser cutter?. Well, after cutting my initials into every metal object in the house, I would use it to score crease patterns. That sounds not so interesting, hunh? I am a paper folder and I have been investigating curved folds and twist folds in the past few years. Laser scoring makes it possible to dream up and realize models in minutes that might otherwise take hours and hours of precreasing. Perhaps more importantly, you'd be able to identify a blind alley almost immediately. There are things out there on the developable surface you'd be amazed to see -- well, I'm always amazed -- and the ability to laser score these ideas as they come would be extremely freeing.You know, unlike every other schnook in the modern world, I maintain a blog -- come visit me and learn the ways of Open Source Origami. (I'm not the only one, you know -- there's lots of us and the idea is spreading.)

Posted by oschene 10 years ago

Knex Combat/War Worthy Shotgun - A Tribute

Hello everyone,  So, out of the blue I decided to take a walk down memory lane and watch some old K'nex gun videos on YouTube. After some time, I came across a video from several years ago. I'll link the original below, but basically it was a video by KILLERK about wanting to build a more war-worthy shotgun. There were a couple of these videos where he basically talked about what he wanted to have on this gun. At the time, I didn't see a video or any post on a finish product, so I decided to build it myself based upon his wants.  Note this gun is unfinished as I just wanted to show it off. However, it will be completely finished, and if there is a demand I will make instructions for it. The following are the guns features, along with its characteristics: -Pin guide -Charging bolt -Straight-pullback rolling trigger -Comfy stock -Comfy handle -Trigger guard -Finger separator  -Sturdy construction -No broken parts (None are required)  -Good ergonomics -Looks nice/clean -Shotgun turret, with KILLERK's shells -Because of the design, trigger strength, and shell design, the gun is very powerful -Good spread of bullets, thanks to the shell Now for something a little more personal. Personally,I think it is the best gun I have ever made. I wanted to make one last gun that revived old concepts as sort of a thank you to the community that I've been on since 2011. This community has been a considerable part of my life, as I used to spend a lot of timing playing with these plastic toys. With leaving for college in a month, I don't see myself really building anymore, not to mention posting anything new. The post I make for this gun will be my last K'nex related post. However, like most, I'll still lurk around.  KILLERK's video Thank you to all.  -Didexo

Posted by didexo 1 year ago

Great Pro Account Giveaway!

I have, so far, published 179  instructables, many of which have been featured, and I have also been lucky enough to win a few contest prizes. This means I have accumulated Pro codes. A lot of Pro codes. To be honest, it would take a genuine medical revolution for me to live long enough to be able to use them all, so I want to spread the joy. But, you have to earn them. All you have to do is post one of four things in the comments: A photo or video of something you made by following one of my instructables.  A photo or video of something you made that was (however vaguely) inspired by one of my instructables. A link to an instructable of your own that you are kind of embarrassed about publishing, but can't really bring yourself to delete. A photo of an instructable-related image you have spotted "in the wild" - say, an instructables shirt on a passing stranger, or you meet a dog-owner with their dog's back legs in a home-made wheelchair. The ones I like (and I'm often easily pleased) will be sent a code to unlock a 3 month Pro account. If I'm really impressed, I will send a code for a full year's Pro. This contest is open to absolutely anybody, anywhere, with no deadline (except for the natural deadline of running out of codes), and only one real rule: don't be greedy. If you are already Pro, you can also nominate somebody else to receive the Pro code, or just pass it along to them yourself. Feel free, as well, to share this topic with your friends you wish would join the site. (What does turning Pro actually get you?) A word of warning: if you do not use your code quickly, I may accidentally give the same code to somebody else, and if they use it first, you're kind of stuck...

Posted by Kiteman 5 years ago

No patent on this one.

I have an idea. It could be a good one, and it could be a useful one. It could even be a money-spinning one, but I want to spread it instead of earn from it.What I'm thinking of was inspried by potato cannons:Imagine a combustion chamber of reasonable size, say a gallon volume. Cylindrical, it is domed at one end t withstand internal pressure, but the other end tapers to a narrow outlet.The idea is that an explosive mixture in the chamber (anything handy, but gasoline/air, ethanol/air and butane/air are the most likely) is ignited by a spark, just like a potato cannon. There is no ammunition, though.The tapered pipe (I hope) concentrates the blast to release a "bullet" of rapidly-moving gases.The whole cannon points down at the ground, the muzzle only a few inches from the ground. The detonation is triggered via a long cable (metres long). The "gas bullet" hits the ground with a large enough force to simulate the step of a human or animal, or the passing of a tyre. This triggers the landmine left months ago under the soil.My idea is, in effect, a low-tech device, capable of being built and repaired by semi-skilled locals, from scavanged materials, in war-torn areas. With a bit of training, a small team could use one to safely pound a mine-field hard enough to trigger the mines and make the area safe to live in. The cannon would be damaged by explosions, but not so badly that it would need repaired after every use, and it could be easily fixed with scrap from the nearest wrecked landrover.Would this work? Or would they need solid ammunition, say lumps of timber or rocks wrapped in rags to make a seal? That would need a staight (not tapered) barrel, but it's the same idea.I don't have the space or equipment to make one myself, and land-mine charities won't tell me how much force is required to trigger a mine, but most of you reading this are in the US, and it seems you have an easier time finding this kind of thing out.Run with the idea, chaps. Build one if you can, and ship it to somebody who needs it, or come up with better plans than my rough idea, and post them to those who need them.

Posted by Kiteman 11 years ago

Are high power resistors really neccessary on a benchtop PSU conversion?

Was looking through the site and I was just wondering--why all the huge resistors on the bench-top power supply conversions of PC Power supplies? From personal experience this seems like a waste of perfectly good electricity.I know that they require some current to just stay on however in designing a project for my school's Engineering Technology department I found that the heat generated by such a small resistance (Around 10 ohms) was unacceptably high. Originally I was looking at Instructables and this sitethis site for inspiration but all the cooling measures taken to prevent the high power resistor from becoming a hazard seemed rather silly. A few calculations and experiments later with the 250 watt power supply and I determined that 160 ohm1 watt resistors and 1K 1/2 watt resistors were perfectly acceptable for the purpose of keeping the PSU awake and functioning. I connected one of each between each voltage and ground. According to calculations I can get away with dissipating a grand total of two watts or less spread across multiple resistors.The current divider rule dictates that if you add resistances in parallel, the resulting resistance will be smaller meaning more current will flow through the overall circuit. However this increased current will divide itself across the parallel resistances according to the rule Ix= RtIT/(Rx+Rt). The current through and power dissipated by the resistor you've soldered into the PSU will not change enough to be significant no matter how large or small a resistance you attach in parallel with it--with the exception of an effective short and what in God's name are you doing intentionally shorting the terminals of your bench-top PSU? Now several months later, the PSU is still operating happily and powering multiple micro-controller projects on a display board. Therefore I can reliably conclude that the high-power 10 ohm resistors in many computer power supply conversions are probably a gratuitous waste of wattage. You can get away with using a higher resistance and a resistor that dissipates much less current.

Posted by Psickattus 10 years ago

MIT Open-couseware Helps Physics Professor Become a Web Star

Open-courseware is helping some MIT professors gain much deserved recognition. While I never took a class from Walter Lewin, I did watch a Nobel laureate (before he won the prize!) ride that same rocket-powered tricycle across the stage of 26-100 (I wrote a little bit about that here in a comment).At 71, Physics Professor Is a Web StarCAMBRIDGE, Mass. Walter H. G. Lewin, 71, a physics professor, has long had a cult following at M.I.T. And he has now emerged as an international Internet guru, thanks to the global classroom the institute created to spread knowledge through cyberspace.Professor Lewin's videotaped physics lectures, free online on the OpenCourseWare of the Massachusetts Institute of Technology, have won him devotees across the country and beyond who stuff his e-mail in-box with praise."Through your inspiring video lectures i have managed to see just how BEAUTIFUL Physics is, both astounding and simple," a 17-year-old from India e-mailed recently.Steve Boigon, 62, a florist from San Diego, wrote, "I walk with a new spring in my step and I look at life through physics-colored eyes."Professor Lewin delivers his lectures with the panache of Julia Child bringing French cooking to amateurs and the zany theatricality of YouTube's greatest hits. He is part of a new generation of academic stars who hold forth in cyberspace on their college Web sites and even, without charge, on iTunes U, which went up in May on Apple's iTunes Store.In his lectures at, Professor Lewin beats a student with cat fur to demonstrate electrostatics. Wearing shorts, sandals with socks and a pith helmet -- nerd safari garb -- he fires a cannon loaded with a golf ball at a stuffed monkey wearing a bulletproof vest to demonstrate the trajectories of objects in free fall.He rides a fire-extinguisher-propelled tricycle across his classroom to show how a rocket lifts off.

Posted by ewilhelm 10 years ago

Need help with pulse width modulation for motor for aiming laser pointer

I'm trying to build a model with a small remote control laser pointer aiming system. I'm not exactly a mechanical genius and, I don't want to spend over $100, or much over $30 if I can help it. I figured I could set up a simple pulley system with some cord running from the laser pointer to two small electric motors, one for right and left and another for up and down. I don't need the laser pointer to swivel 360 degrees, just about 90 vertically and horizontally would work fine. If I were to attach a few monetary switches, I would be able to run the motors one way or the other, and get the laser pointer to point wherever I want. The main problem I am having is that every electric motor I find has a RPM in the thousands. Such speed would jolt the laser to one side or the other without any means of fine adjustments in aiming. I've looked around and it seems to be the general idea that either a PWM (pulse width modulation) controller or gear box are the best options to get lower RPM out of a motor. I don't have much room to work with where I want to mount the laser pointer, so I decided to go with a PWM controller and spread the components around the model to save space. I've been doing my best to construct this.... ... but my knowledge of circuitry is rather limited, having only take a college course on basic circuitry, I'm in a little over my head. Could someone please identify the component labeled "PULSE WIDTH ADJ" (center bottom, between the two diodes) is it two 250K resistors in series with the lead to the left acting as a resistive load or something else? Also, what is the component labeled "IRFD024" (far right below the motor) I would be very appreciative for any information that would aid me in getting a PWM controller to slow a motor down to around 50 RPM. If some one has a better idea all together, I would be willing to scrap the motors for another project and start from scratch.

Posted by cruton 8 years ago

Instructables in the New York Times - How to Improve it? Ask Those Who Use It

Instructables was mentioned in the New York Times article "How to Improve It? Ask Those Who Use It" about user-innovation. I know this might cause a stir, but specifically mentioned are the K'Nex guns. Here's the section of the article that mentions us directly:Even some of Mr. von Hippel's acolytes remain cautious. "A lot of this is still in the category of, , 'You could imagine this working out really well,' " says Saul T. Griffith, who as an M.I.T. engineering student was part of a group of kite-surfers who developed products for their sport that have since become commercialized. Mr. von Hippel wrote about Mr. Griffith in his 2005 book, "Democratizing Innovation."Still, Mr. Griffith can cite a long tradition of user design. One of his favorite examples comes from the title article in Tom Wolfe's 1965 book, "The Kandy-Kolored Tangerine-Flake Streamline Baby," which chronicled car customizers whose innovations -- tailfins, double headlights, low-slung bodies -- were later adopted by Detroit. Mr. Griffith says that even now, millions of people modify their cars, far more people than the world's automakers could ever employ in research and development.There is currently no effective way for companies to harness the ideas of those millions. But the Web -- itself created by Tim Berners-Lee, an Internet user looking to do something new -- seems to offer an excellent potential idea-gatherer. Mr. Griffith's industrial design firm, Squid Labs, last year spun off a do-it-yourself community site on the Web called the Instructables, which features items as diverse as the Minty Boost iPod power source, dachshund wheelchairs and guns made entirely of K'nex toys, along with detailed instructions on how to build them. The Instructables intends to offer software to companies that want to build communities of citizen product developers.Mr. von Hippel, who has spent 30 years waiting for his ideas to take hold, says that as user communities like the Instructables spread, they will dominate innovation. He calls them "the dark matter of innovation."

Posted by ewilhelm 11 years ago

Double barrel break action shotgun in 1-3 days

I have been building on this thing for the past 3 days, 1 to 3 hours a day. It's a massive, yellow rod thick, double barrel, super strurdy, pin guided (!) break action shotgun. I will give credit to Seleziona, because I took his Ghost 3.0 stock and trigger + handle mech and modded it slightly to fit my gun. (Don't worry I asked him in a PM) Don't get me wrong, but I just didn't felt like making a stock and trigger (mech) myself because I tried but failed 3 times because I'm not very good at making stocks and triggers out of nothing. Maybe a lack of experience, you guys tell me. More details and (a) pic(s) will come tomorrow. Now, on the other hand: I was scrolling trough the forum this evening, and I saw Kinetic's topic about innovation. and I'm 'afraid' that this shotgun will not be 'mind-blowing' to you professional builders and innovators like Dunkis, Kinetic, DJ, etc. I expect that you pro's will think: Bah, meh, just another generic gun, not innovative. And honestly, I don't want the pro's to think that. I hope that you professionals and innovation-addicts realize that some not-professionals are doing their best at innovation, but sometimes can't help that their design is too generic. So I hope this will not be too generic and 'not-innovative' and you pro's like it so we can keep the community alive and maintain all the other things that were discussed in the forum topic the last few weeks/months. I always try to be as innovative as possible, but if I want to post something that I made and if I'm proud of it, even when it's not innovative, is it ok if I post it? In my opinion, I have the right to post it. The point is: I did my best, I'm always doing my best at innovation and building and I hope you guys will like it. (Don't mind my spelling and grammar please, English is not my home-language) Regards, H.

Posted by H1T4TCH1 6 years ago

Nylon and substitutes on a cold bed

It's been some time and I made progress with Nylon. Aldi had some cheap craft glue with methanol as the solvent - this stuff works great for PLA, ABS AND Nylon. The common problem with nylon is that it has no real adhesion to anything, except cardboard and bakelite. Cardboard makes a clean up nightmare and bakelite is not always easy to find, especially not the right type. So I tried various glues, paints and primers but none was really suited for all printing needs. And the cleanup of the bed is imoprtant too as I did not want to spend hours scrubbing with acetone or similar nasty solvents. After the first great succes with the clear Aldi craft glue I checked the local 2$ shops and carft stores and found similar glueswith methanol as a solvent. Since not everyone is lucky enough to get these specials I will tell you what to look out for if you try clear craft glue: Don't buy anything that can be cleaned up with water - you want methanol or ethanol as the solvent in the glue! Do a test with the glue on something that usually does not bind well to cheap glue, like glass and blister packs. Let the glue dry and peel it off - it should be a clear film that is quite strong and barely streches when you pull it. It almost feels like hard paper. All good so far? Check if the nylon, pla or abs really sticks to it: Spread a very thin layer on a piece of cardboard and let dry. Add another, thicker layer and let dry again. Now hold it under your nozzle and extrude a bit of filament while moving the cardboard around. Let cool and check how good it sticks. In a perfect world the cool plastic should peel the papaer off with the glue. Time to prepare your print bed the same way and to start printing ;) Just use a very thin first layer and for the first layer much lower speeds than usual. I print nylon with 60mm/s and the first layer at just 25mm/s, any faster and the first layer does not look right. ABS and PLA are much more forgiving here.

Posted by Downunder35m 2 years ago