Search for infinite in Topics


the infinite improbability drive? Answered

I recently finished reading the hitchhiker's guide series. Douglas Adams is a genious! he and authors such as George Orwell, are commonly looked over by todays readers. anyways, on to my question. does anyone know the components required to construct an ifinite improbability drive, like the one from the books? (and for the ignoramous who decides to tell me that its fictional and to shut up, i rebut before you post with, i know, if you had any sense to know that before your reading this, you wouldn't post said comment.) but yeah, does anyone know? i am looking for great minds such as kiteman or gmjhowe, or maybe a less well-known person. whoever you are, thanks in advance.

Question by MrMystery96    |  last reply


Infinite Rotary Switch? Answered

I'm looking for the search term I need to find a "Rotary Switch" That spins very smooth and will keep spinning indefinitely like a volume control switch.

Question by bradleynelson102    |  last reply


Infinitely Variable Transmission?

Ok, so I have been looking at this thing called the D-drive and it inspired me to come up with my own IVT design which was solid gears for max torque handling and still could change speed and direction easily and smoothly. This is what I came up with and I would like to hear your opinions on it.  It starts with input to a differential, one side of which is inverted and the other isn't before returning to a second reverse powered differential.  The two sides are slowed using a fluid braking system which has a rotor powered by the side's drive-line, and a flow limiting valve to apply resistance.  As one side slows the other accelerates.  When there is no brake power on either side you have reached a powered neutral, and when the second side is braked the direction changes and accelerates. So, will it work? How practical is it? Are you going to say it sucks, then steal my idea?

Question by jj.inc    |  last reply


infinite loop on instructables.com

whenever i try to open www.instructables.com i get an infite loop in my browser and i cannot access the page. linux tool "wget" gives this output: $> wget https://www.instructables.com/ --2011-06-01 10:37:35-- https://www.instructables.com/ Resolving www.instructables.com... 74.50.63.27 Connecting to www.instructables.com|74.50.63.27|:80... connected. HTTP request sent, awaiting response... 302 Moved Temporarily Location: https://www.instructables.com/index [following] --2011-06-01 10:37:36-- https://www.instructables.com/index Reusing existing connection to www.instructables.com:80. HTTP request sent, awaiting response... 301 Moved Permanently Location: https://www.instructables.com/ [following] --2011-06-01 10:37:36-- https://www.instructables.com/ Reusing existing connection to www.instructables.com:80. HTTP request sent, awaiting response... 302 Moved Temporarily and so on... that does not seem to be right :) when i open a saved link everything is fine, i just can not access the root page. no idea, if that has anything to do with my ips ( germany ) or has a different cause, but at the moment. tested from various providers, browsers and operating systems.

Topic by JohnCopper    |  last reply


Infinite Scrollin Web Pages

Infinite scrolling webpages are the bane of the internet. Once you get beyond 3-4 screens of results, it is almost impossible to look at an article and get back to where you left. Please go back to multiple pages with a page number menu.

Topic by pwiecek  


I have idea for infinite energy!

I have idea for an infinite energy or perpetual motion. I know that perpetual motion is impossible because it contrary with firs and second law of thermodynamics. I have learned those laws on  school too but I asked my physics teacher ( I'm in high school now 16 years old) and he said that it looks possible. The problem is that I'm from Kosovo,and there is no any labs of that type where I can make my experiment. If you have any idea about any of this labs which are interested on infinite energy experiments. I would appreciate your help.

Question by Mrfatjonable    |  last reply


Physics question? Why doesn't this work? Answered

So included I have the original "troll physics magnet car" that supposedly would use magnets for propulsion. I know that it doesn't work since the front magnet pulls the car and the car pulls the front magnet, so the energy is evened out. But if you put a stronger magnet on the front, then the smaller magnet on the car wouldn't have enough strength to equalize the larger magnet, so why wouldn't the car move forward?  What if you applied the same idea to a generator? (look at the picture with the circles and rectangles) Wouldn't the bar magnets continue to repel each other and make the generator wheel would spin forever? If the wheel was balanced and was given a little push to get things going, I don't see what the problem would be. I'm not planning on building this machine, so trial and error is out of the question for me.  Please help!

Question by masterbuilder    |  last reply


Search infinite scroll not loading more results

When I search, the first few pages of results are normal, then when I scroll past the point where it needs to load more, it kills the page. It turns white and is completely blank for about 5 pages, then it loads the homepage instructables and doubles up the footer. After it kills it, there is a little sliver of the original search results at the top but it is not clickable.

Topic by abm513  


Instructables editor infinite loading when clicking "edit instructable" button from within an instructable that you have made

When you visit an instructable that you have made and click the "edit instructable" button from within the instructable under the Author header, the editor loads infinitely.  The only way to get out of this infinite loading is to refresh the page. If you don't understand what I'm saying, post a comment and I will further clarify what I'm trying to say.

Topic by www139    |  last reply


Infinite LED Tunnel, DIY Glow Stick, Go Go Gadget Copter

Infinite LED Tunnel DIY Glow Stick Go Go Gadget Copter Organize with Library Furniture Security Camera Lamp One Leg Therapy Stool Soda Can Tinwork Genie on a Flying Carpet Duct Tape Hammock Muppet Animal Costume A Week Without Stuff Endless Rain Wheel Amazing Evil Clown Cake Repair a Telephoto Lens Instructables.com - 82 2nd St. - San Francisco, CA

Topic by randofo  


A Question About the Universe and Infinity

I have a rather brain-bending question for you. If the concept of infinity exists,(which it does), then shouldn't matter be infinite just like numbers? The universe is made up of matter, and at a certain point (we believe) it just stops. No more universe. But then, how does that make any sense? How can there be nothing? From alot of intense thinking on my part, as well as some digging, I have found that the concept of infinity works in two ways:  1. You can have an exponential growth of numbers, going on and on infinitely. 2. You can take a finite number such as 1, and divide it infinitely. Both of the above create infinities, so technically, a finite amount of matter (such as the universe) could be infinite, or that is, infinitely split in half.  But what about the first infinity? Numbers are infinite, but is matter bound by the same rules? Does this expose a flaw in the way we think about the universe?  The same issues occur in our concept of time, if it is measured with numbers, shouldn't not only the future, but also the past be infinitely long? I have also heard (and believe) that time is an illusion created by humans to create order in things, and the only reason it looks like it is moving forward is because of entropy. In which case, I must ask, doesn't this make time travel possible? (I realize this gets into the whole 4th-12th dimension thing, but I wont go there.) If you could maybe give your thoughts on this barrage of questions that would be great. Thanks

Topic by vroom...vroom...    |  last reply


Awesome DIY V-Day Ideas?

I've checked out the other stuff, but I'm still thirsty for your infinite wisdom. What are YOU doing for v-day?

Question by Heretix    |  last reply


Unbearably cute use for K'NEX...

Clever use of an infinitely recyclable material - the parts can go back to being a ball machine the minute the piglet and up as sausages. See also: LINK, LINK.

Topic by Kiteman    |  last reply


rotating hanging wheel decoration?

I had a hanging wheel decoration, just wondering if the wheel can rotating using some weight so the wheel rotate infinite. perhaps moving its axle or something

Question by jul_ms    |  last reply


Set Promoted Items Saving Not Saving

After rearranging the items for "set promoted items" and then pressing Save, "saving" occurs to which occurs for an infinite amount of time ie it does not appear to work. Best wishes and all, thx. 

Topic by TVMiller    |  last reply


Robot, made on the BBC

It's a big website (it even contains an Infinite Improbability Drive ), so it was bound to happen - Robot has snuck into the kiddies' Make and Do section of the website. He doesn't look too happy about it, though.Here are the instructions - there's even a video.

Topic by Kiteman    |  last reply


What should I do with a bunch of tennis ball containers? Answered

 The local tennis court just throws them away, so I have access to basically infinite tennis ball containers and flat tennis balls.

Question by WerdnaN    |  last reply


Search Bug

Bug while searching: When searching for something with not many results (ex: bertwert) the page will after the results, on a new section, 50 random instructables. Then it will reproduce the page after and after infinite times. This does not happen when there are no results but other then that it always happens. See images for details. System details: Windows 8.1 Chrome 39 Reproduction: Search a term and scroll down to the end. (ex: https://www.instructables.com/howto/bertwert/) Thanks :-)

Topic by DELETED_bertwert    |  last reply


Where is a rainbow? Answered

As you may be aware, your reflection in a mirror appears to be behind the mirror. But, where is a rainbow? The Sun is over your shoulder, the cloud of raindrops is in front of you, but what is the apparent location of the rainbow? Is it between the observer and the water droplets, in the same location as the water droplets, or behind the water droplets (from the POV of the observer)? Or is it at some indefinably infinite location? I should know this... (a sketched-out ray diagram would be greatly appreciated)

Question by Kiteman    |  last reply


HD 2 reboot loop?

My New HD2 recently ran out of batteries, and when I went home to recharge it, it just booted up normally and vibrated, then turned off. It doesnt even charge! It just gets stuck like this in a an infinite loop, and I dont know what to do! please help!

Question by Soopah Steve    |  last reply


Electrons flow from positive terminal to negative terminal inside a battery? Answered

If a bulb is connected to a battery, then in the bulb the direction of current is such that it flows from negative terminal of battery to its positive terminal. Whereas inside a battery electrons flows from positive terminal to negative terminal. How is that possible? If this is true wont it look like saying that a battery has infinite life time as battery discharges via bulb but charges inside by itself.

Question by deepakmurali    |  last reply


Submit?

Why does it say "Submit"?  It should say "Build" or "Build and Submit". or "Build then Submit" or "Build Instructable then Submit" Why would I click on something that's going to send before it's built? Look at the interface for this form.  Step1: Edit  Step 2: Preview  Step 3: Publish.   (While I'm at it those" step" buttons should either work as buttons or be made to look like something different) Makes infinite sense, unlike the "Submit" at the top right. Improve these issues, please. Thank you for your time, Marcintosh

Topic by marcintosh    |  last reply


Could someone tell me exactly what resistors/DC transformer/gauge copper wire I need? Maybe even provide some links?

So I'm trying to make this:https://www.instructables.com/id/cool-DIY-infinite-LED-tunnel/ and I bought 20 of these Blue 10mm superbright LEDs 1025LB7C Could someone tell me exactly what resistors/DC transformer/gauge copper wire I need? Maybe even provide some links?Maybe even provide some links?

Question by shyguy567    |  last reply


Need help with LED lights

Hey, I'm making an infinity tunnel/mirror based off an instructable on this site. https://www.instructables.com/id/cool-DIY-infinite-LED-tunnel/?&sort;=NEWEST&limit;=40 But the instructions are crystal clear and I'm running into a few road blocks. What kind of LED should I buy? They all have to be the same voltage correct? Does it matter if I connect it to a battery pack or the wall? What kind of battery should I use? Basically I know nothing about electronics and I don't want to create a fire hazard. Any help is appreciated.

Topic by changsta3  


Google Sketchup: Fill unseen space?

I'm trying to get a cheap 3D print of a model(<$100 with S&H;). But one problem is that the walls are infinitely thin, so I need to fill the space between them. But how do I do this? The main problem is the boxes all around the surface(look at the uploaded model). They need to be filled, without the internal space where the flashdrive goes being filled. Can someone please tell me how to do this, and also a cheap 3D printing service?  Cheapest I have seen was i.materialise. The price for the model: $36. Not bad at all. The price of shipping: $144. I'm not going to spend almost $200 on a case for a flashdrive.

Topic by metrogdor22    |  last reply


Halo Reach forge world Racetracks

So I recently got Halo Reach, and I started messing around with Forge a few weeks back.  After a deleted prototype, I ended up making "Infinite 8", a racetrack map that has nice wide tracks and is shaped like the infinity logo.  It's not quite done (I'm still debating on whether to add grav lift boosters and obstacles) but I have a video of what I have so far on Youtube: If you want, you can post videos of your own forge world maps too! UPDATE:  here is me running a finished version of my course:

Topic by DJ Radio    |  last reply


I have a simple question about watts... Answered

Watts = amps times volts, correct? So if I had a laptop that charged with a 60 watt power supply, could I: -Charge it with 10 amps at 6 volts? (that is the same as 60 watts) -Charge it with 6 amps at 10 volts? (that is ALSO the same as 60 watts) -Charge it with 5 amps at 12 volts? (that is ALSO the same as 60 watts) -ect... Watts is just how much 'energy' passes a single point every second (or whatever), so it doesn't matter how you get the watts, watts is still watts? I'm still trying to grasp the whole concept of watts, so yours answers are infinitely appreciated!!!

Question by nepheron    |  last reply


What is the current on my foam cutter? Should I be worried?

I built the 5 min. foam factory, but instead of a model train transformer ($45 for the cheapest one they had) I used a regular 12 volt transformer and a rectifier bridge (I had to borrow it from my infinite LED tunnel :'( ) Now when I went to buy a variable resistor/potentiometer for the thing my local electronics shop guy said that the 12 volt transformer put out too much current for the ones he had. Now this has me worried. How much current is currently going through this thing? Should I be worried?

Question by shyguy567    |  last reply


Need advise with making USB LED string

Hey all, First post and I have an itching to make something for once, I want to make an "Infinite Mirror", I have seen a few instructables on how to proceed, My main concern is that most of them are battery operated, And I want to operate mine from USB, Now I will put 12 lights in a string, Then output to USB , But will I need any resistors, chips ect? or will just wiring up 12 LED's straight onto a USB end work? I don't want them to do anything fancy, Just be on when plugged in. Any help would be greatly appreciated.  Thank you!

Topic by DatenThielt  


Is there any light that for a refrigerator that is motion activated that runs on external power? Answered

I have a small chest freezer and a mini fridge that I keep things in and i wanted to know if there was a product on the market that could provide lighting to these? I dont want to drill into the units so something battery powered would be ideal, if anyone had an Idea of something that could be made that would be good as well. The closest thing I found was this http://www.amazon.com/Coleman-Auto-On-LED-Cooler-Light/dp/B0043A3370/ref=sr_1_2?ie=UTF8&qid;=1306905359&sr;=8-2 and it is really close but I thought I would put my problem before this infinitely creative community.

Question by RichardHellyer    |  last reply


Neo1973 or Chumby

HiI need your advice. I have been looking at the neo1973 phone for a while. It is an open source phone that allows you to do a lot. It has a touch screen,gsm,gps,2 accelerometers,and wifi. It is open source so there is infinite number of applications available. It costs about $400.Just recently I have been looking at the chumby. The chumby is an open source linux based mini computer. It has on 3.5 in touch screen, 2usb ports, wifi, and built in speakers. You can do a lot with its widgets (rss,weather,youtube,music,movies,flickr,facebook...ect) It cost $180. So I was wondering which one would you get and/or if you have any experience with one or both of the products. Thanks

Topic by joejoerowley    |  last reply


A way to calculate something about a ferromagnetic ball in a magnetic field? Answered

I've built something like this https://www.instructables.com/id/Mechanical-Rail-Accelerator---Non-electromagnet-%22r/ and now I am thinking of calculating the kinetic energy of a ball flying off the magnet if it was 'set off' by a ball at some velocity. I have a great lot of problems: 1 The ball is about the same size as the magnet, which makes it impossible to say it is 'infinitely small'. 2 It is near the pole, so the magnetic field is not even (not like inside a coil). 3 The ball is ferromagnetic, so the field is going to be even more disrupted. 4 There is no Physics teacher this week. Maybe (I hope) there is a formula of potential energy of something like my ball in a magnetic field? Any ideas? 

Question by gruffalo child    |  last reply


Gifs just run once

On the drafts I am writing, I have noticed that the gifs I add run just once when I click on "Full preview". This is the case for the gifs added in the "regular" photo frame, but not for the gifs embed in the text (they are run in infinite loops). And I have the same problem with the last Instructable I have published (https://www.instructables.com/id/Universal-Arduino...), it looks like the gifs are played once then they stop.Is that a bug? I really like to add gifs to my articles to give a better overview of the project, but if they stop after few seconds or even less, I guess no one can see them...Thanks!

Topic by Matlek    |  last reply


Will this electric generator idea work?

Will this work? A wheel that has neodymium magnets and coil of wire around iron, basically an electromagnetic. next to the wheel is a coil of wire that generates elctricity when the wheel turns, this coil conveys the electricity to the electromagnet through means of copper brushes. On the other side of the wheel is a coil of wire which gets electricity to power things. In my head, id say that the magnet powers the 1st coil then the 1st coil powers the electromagnet which also powers the 1st coil which powers the electromagnet even more. So in my theory, the electromagnetic gets infinitely powerful (till it burns out). So in a way the wheel can be cranked by hand and yet the 2nd coil will get a large amount of energy. Will this work in real life? why or why not? If this idea already exists what is the name?

Topic by alester333    |  last reply


operational amplifier

I need someone that can tell me what an operational amplifier is. ive been googling these shenanigans for the better part of a day and cant seem to find anything other than technical diagrams. i just want to know, generally, what they do, what theyre used for, and where i would find one inside something in my house. im actually really pissed off right now, every page ive read tells me how important they are, and exactly how they work, and that they are used "in a wide variety of electronics", and that they have "nearly infinite uses" but no one seems to say "hey, here's where you might be able to find one, and here's what it will be doing" anyone got any answers to this. and so help me god, if i see any schematics posted with that little triangle that ive been staring at all day, i might set someones house on fire. (not mine, of course....but someones.....)

Topic by justin.jackson    |  last reply


For those in "a dark place"

We seem to be attracting a number of troubled souls at the moment.Without wanting to reject any cries for help outright, most people here are ill-equipped to offer useful, non-judgemental advice.If you are reading this in the UK, may I recommend The Samaritans?I have had personal experience of their services when trying to help a close friend who tried to commit suicide, and I found them to be clear, rational people with a far better understanding of the depressed or teenage mind than I do.Their website is http://www.samaritans.orgTheir email address is jo@samaritans.orgTheir phone number in the UK is 08457 90 90 90Their phone number in the ROI is 1850 60 90 90If you are not in the UK/ROI then they recommend using http://www.befrienders.org/ to find similar help and advice in your country.As I said, this is not meant as a rejection - we will help if we can - but there are people infinitely better at providing suitable, non-judgemental, anonymous advice.If any American readers know of similar organisations in the US, please add links to their websites.

Topic by Kiteman    |  last reply


solar install question

Ok so I see a few solar setups online. now I have been researching for a while on this and no one can give me the answers so here i go on here. So i want an UPGRADE-ABLE solar setup. right now I have 2 150ah 12v batteries. I have multiple 50 amp charge controllers. so when I buy the solar panels I can plug in and get batteries going no problem.... My issue is the mains voltage side of things. I want to have something like a fuse box, this will have my main breaker and then the independent safety switches. the issue is to do this I need to make sure all my power is on 1 line. so if I buy a few small inverters I will not be able to piggyback them as they tend to go bang. so what type of inverter can I get that will be able to go in parrallel to allow me to get more amps if needed? I am hoping there is one that is infinitely upgradeable just in case. TLDR what type of off-grid inverter allows parrallel connection to other inverters??

Topic by plucas1    |  last reply


Operational Amplifier input voltage affects other input?

Hello, I have created a simple circuit where 2 10k resistors make a voltage divider. Supply voltage is 12.5V and if I measure in between the 2 resistors, I'm getting 6.3V. Great! Now I connect that 6.3V to the +input of an OpAmp. Result: the value is still 6.3V. Great! (The OpAmp is also fed with 12.5V) Now I connect the -input of the OpAmp to the supply voltage (12.5V). The voltage in between both resistors suddenly changes from 6.3V to 10.1V. NOT Great! Now I connect the -input of the OpAmp to ground (0V). The voltage in between both resistors changes from 6.3V to 2.4V. ?! The output of the OpAmp is not connected to anything. I thought that OpAmp inputs, in theory, have infinite resistance? The datasheet of this OpAmp (LT1253) sais the input resistance should be 10Mohm I also tested this same thing with the LT1497 and the results are the same. When the -input of the  OpAmp was connected to 12.5V, I measured the current going into that pin, 39mA!! (Only measured on the LT1253) What's the problem here? Are both OpAmps broken? Or is there something about the way OpAmps work, that I clearly don't understand?

Question by DELETED_Electorials    |  last reply


Arduino starts up automatically

Hello instructables, i ran the code below in the arduino uno, (4 motors, 2 L293D driver chips) void loop() {   digitalWrite(motor_pin1,LOW);    //forward back   digitalWrite(motor_pin2,HIGH);   digitalWrite(motor_pin3,HIGH);      digitalWrite(motor_pin4,LOW);   digitalWrite(motor_pin5,LOW);    //forward front   digitalWrite(motor_pin6,HIGH);   digitalWrite(motor_pin7,HIGH);      digitalWrite(motor_pin8,LOW);   delay (5000);     digitalWrite(motor_pin1,HIGH);   //turn right    digitalWrite(motor_pin2,LOW);   digitalWrite(motor_pin3,HIGH);     digitalWrite(motor_pin4,LOW);   digitalWrite(motor_pin5,HIGH);   //turn right    digitalWrite(motor_pin6,LOW);   digitalWrite(motor_pin7,HIGH);     digitalWrite(motor_pin8,LOW);   delay (2000);     digitalWrite(motor_pin1,LOW);    //stop moving   digitalWrite(motor_pin2,LOW);   digitalWrite(motor_pin3,LOW);      digitalWrite(motor_pin4,LOW);   digitalWrite(motor_pin5,LOW);    //stop moving   digitalWrite(motor_pin6,LOW);   digitalWrite(motor_pin7,LOW);      digitalWrite(motor_pin8,LOW);     while (1); } by right, the motors should stop infinitely due to the while(1), but this is what happens instead : initial                 : loop1 12 secs later   : loop 2 1 sec later        : loop 3 1 sec later        : loop 4 .... why is it running more than once?

Topic by fujiapple    |  last reply


Protecting You From the Boogyman

Both my girlfriend and my sister are afraid of the dark. I've heard so many stories and them waking up in the middle of the night, hearts racing, and then checking under the bed before they run to the bathroom. Afterwards, they run back and literally jump into the bed and hide under the covers. While this is infinitely amusing for me, I'm sure it's not as fun for them. What could actually be really cool is if the iCreate could sleep near the bed and the wake up when motion is detected, turn on a light and then follow the person to the bathroom shining a beacon of safety/boogyman death ray. ;) It's actually not as innocuous as it sounds. To pull this off some of the classic problems in robotics would have to be solved including object tracking (probably using infrared), collision avoidance and coordinated movement all using the iCreate. If you think about it, the possible extensions are many... perhaps on command the iCreate could play a chosen melody to soothe you back to sleep; perhaps each person using the iCreate could have a different colored light to shine the way; and if you could do that, perhaps you could also mod it into party mode where it would shine a bunch of lights in a pattern while it played songs. Groovy. I'm really excited by the possibilities and ideas floating around as a result of this contest, so thank you iRobot for the opportunity, we're slowly getting there!

Topic by althalinelife  


Protecting Your Loved Ones from the Boogyman

Both my girlfriend and my sister are afraid of the dark. I've heard so many stories and them waking up in the middle of the night, hearts racing, and then checking under the bed before they run to the bathroom. Afterwards, they run back and literally jump into the bed and hide under the covers. While this is infinitely amusing for me, I'm sure it's not as fun for them. What could actually be really cool is if the iCreate could sleep near the bed and the wake up when motion is detected, turn on a light and then follow the person to the bathroom shining a beacon of safety/boogyman death ray. ;) It's actually not as innocuous as it sounds. To pull this off some of the classic problems in robotics would have to be solved including object tracking (probably using infrared), collision avoidance and coordinated movement all using the iCreate. If you think about it, the possible extensions are many... perhaps on command the iCreate could play a chosen melody to soothe you back to sleep; perhaps each person using the iCreate could have a different colored light to shine the way; and if you could do that, perhaps you could also mod it into party mode where it would shine a bunch of lights in a pattern while it played songs. Groovy. I'm really excited by the possibilities and ideas floating around as a result of this contest, so thank you iRobot for the opportunity, we're slowly getting there!

Topic by althalinelife    |  last reply


Being a bird brain isn't so bad after all: Singing in the Brain...song birds n songs, people and speech...

Here is a bit of the article: ' Given the proper teachers and timing, most humans can learn to produce a seemingly infinite number of sounds and sound combinations. Such is not the case with most animals. In fact, only whales, dolphins, bats, and some birds are known to have the ability to learn vocalizations. Separate a kitten from its mother or other tutor, and its mew will be basically the same as that of its littermates--a pattern that holds true for the howl of a wolf, the grunt of a gorilla, and the whinny of a horse. The trait shared by song birds is even absent from our closest living relative: chimpanzees. Vocal learning has been repeatedly demonstrated in two bird orders, Passeriformes (specifically the oscine songbirds) and Psittaciformes (parrots), and is believed to occur in a third, the Trochiliformes (hummingbirds). By comparing brain structures in these three bird orders, which are widely separated from one another on the avian family tree, Rockefeller University biologist Claudio Mello and his colleague Erich Jarvis, of Duke University, have shown that the same areas that control song learning and production in songbirds and parrots are also present in hummingbirds, a finding that strengthens the case for vocal learning in the latter.'Singing in the Brain: the science of vocalization we share with song birds, but not with Chimps...

Topic by Goodhart    |  last reply


Art Contest: Win an Instructables Book!

We need art for a book and since we think that the Instructables community has plenty of talent and ideas we thought that this is the perfect opportunity for a contest. The theme of the contest is Fail Gracefully. Read on more more details.Eric Wilhelm, our glorious CEO of infinite repute, has been invited to go and talk at OFFF in Portugal in May. As an invited speaker he also gets to supply some art for the event catalog. The theme is Fail Gracefully and the idea is to embrace mistakes in your efforts. Here's their own description:"THIS ISN'T FLYING. THIS IS FALLING WITH STYLE" Be afraid of perfection. Dare to do wrong. Make mistakes. Enjoy 404. Reject everything you know and jump. Try to fly.There is no such thing as failure, but experience. No mistakes, but mistaken views. Errors? We call them acieeed(sp).So the last sentence is a bit confusing, but you get the idea. We're giving away a copy of The Best of Instructables, Volume 1 for the best piece of art and the possibility of being published in the catalog.How to enter - To enter your art, just attach it to a comment in this forum post. - The art needs to be printable so make sure that you have a copy that is high-res. - By high-res we mean 300 dpi - The attachment can be low-res - Enter by March 12th, 2009

Topic by fungus amungus    |  last reply


Protecting You From the Boogyman

Both my girlfriend and my sister are afraid of the dark. I've heard so many stories and them waking up in the middle of the night, hearts racing, and then checking under the bed before they run to the bathroom. Afterwards, they run back and literally jump into the bed and hide under the covers. While this is infinitely amusing for me, I'm sure it's not as fun for them. What could actually be really cool is if the iCreate could sleep near the bed and the wake up when motion is detected, turn on a light and then follow the person to the bathroom shining a beacon of safety/boogyman death ray. ;) It's actually not as innocuous as it sounds. To pull this off some of the classic problems in robotics would have to be solved including object tracking (probably using infrared), collision avoidance and coordinated movement all using the iCreate. If you think about it, the possible extensions are many... perhaps on command the iCreate could play a chosen melody to soothe you back to sleep; perhaps each person using the iCreate could have a different colored light to shine the way; and if you could do that, perhaps you could also mod it into party mode where it would shine a bunch of lights in a pattern while it played songs. Groovy. I'm really excited by the possibilities and ideas floating around as a result of this contest, so thank you iRobot for the opportunity, we're slowly getting there!

Topic by althalinelife  


Protecting Your Loved Ones from the Boogyman

Both my girlfriend and my sister are afraid of the dark. I've heard so many stories and them waking up in the middle of the night, hearts racing, and then checking under the bed before they run to the bathroom. Afterwards, they run back and literally jump into the bed and hide under the covers. While this is infinitely amusing for me, I'm sure it's not as fun for them. What could actually be really cool is if the iCreate could sleep near the bed and the wake up when motion is detected, turn on a light and then follow the person to the bathroom shining a beacon of safety/boogyman death ray. ;) It's actually not as innocuous as it sounds. To pull this off some of the classic problems in robotics would have to be solved including object tracking (probably using infrared), collision avoidance and coordinated movement all using the iCreate. If you think about it, the possible extensions are many... perhaps on command the iCreate could play a chosen melody to soothe you back to sleep; perhaps each person using the iCreate could have a different colored light to shine the way; and if you could do that, perhaps you could also mod it into party mode where it would shine a bunch of lights in a pattern while it played songs. Groovy. I'm really excited by the possibilities and ideas floating around as a result of this contest, so thank you iRobot for the opportunity, we're slowly getting there!

Topic by althalinelife  


Dead Sewing Machine or Dremel Tool Motor

A woman asked me to look at her sewing machine. The motor was dead. A new foot control did nothing. A dealer seemed disinterested in looking at it for repairs, but wanted to sell her a new machine for $700+. Attached is a photo of the commutator from her machine's motor after I cleaned it up enough to run again. After 15 years of use there was so much oxidation and contamination from brushes arcing that an Ohmmeter showed infinite resistance (open circuit) across the commutator, unless readings were taken on the brighter copper colored portions of the commutator. (The brushes are still good.) Then I got reasonable readings, indicating there was actually an unbroken circuit across the armature coils. Removing shrouds and getting to the motor was the most difficult part. Then I turned the motor by hand while I held 500 grit sandpaper on the commutator until it was clean and bright. The motor runs like new again. The owner is very happy. (I made this fix as a favor, not to gain income.)I had expected something like I found in a Dremel tool that quit working. With an Ohmmeter I found a break in the circuit between the field coil and a terminal pin. (I was able to bridge the broken connection and the Dremel workes again.) Another sewing machine did not run, and the problem was found to be a bad electronic circuit board no longer available. That machine had to be replaced.But, sometimes somethng so simple as a very dirty commutator is the only problem and is easily cleaned so the machine works perfectly again.

Topic by Phil B    |  last reply


Looking for constructive critism

I have not written an 'ible in a long while, but was recently so inspired I wrote...   https://www.instructables.com/id/Make-A-2D-Infinite-Runner-with-Unity/ Luck would have it that a game contest opened during my building of the first prototype (pre write up, to get things all worked out), which spurred me on even more. Anyways, I am wondering how I missed the mark completely, not even worth a feature. I have had way lesser projects featured....and well, I was only inspired to write this to share. Anyone who has been writing here for any amount of time knows that you need to be featured to be seen. I gave detailed step by step instructions with many pictures well commented...or thought I did. I did something original (Not many game making tutorials here, only 2 other unity ones, and they are on older versions.) I thought the demo game download was a nice touch.  So I am curious for suggestions on how I could spruce it up enough to be considered as a feature. I believe that people would enjoy the topic, and more importantly, I feel people would like to make this or use this as a springboard to their own version. Was using the robot a big faux pas? I see so many other features that use him and thought it was a good idea. Is the game itself that visually unappealing? Perhaps foolishly , but I love the look....I was...even more foolishly...proud of it. It wasn't something I just knocked out, but rather something that a lot of time went into. Time that was truly wasted if it is never even seen. Discouraged. Any suggestions  to how to make it better would be welcome.

Topic by fjordcarver    |  last reply


Simple question 230v to 12v 50w/5a timed output

Hi, know a lil about electronics and electrical just want to make sure i'm not being a dummy or if there are any other better alternatives. Problem: A timed output circuit has gone bang on an piece of work equipment, wont go into detail as it may confuse the situation but it all works apart form the timed lamp button, I can see components on the lamp circuit disintegrated etc... So I wish to make the lamp part sort of stand alone. plan is to convert a 230v suply down to 12v 5a as the lamp it needs to power is 50w. Resolution: I was going to get this https://www.amazon.co.uk/200-250V-Halogen-Light-Electronic-Transformer/dp/B00CXK30UW and http://www.ebay.co.uk/itm/DC-5V-12V-24V-Infinite-Loop-Cycle-Timing-Timer-Time-Delay-Relay-ON-OFF-Module-/192106941494 Build accordingly and place in a project box with a push button on the project box also. Can anyone see any issues with this? Or am I complicating it, maybe the transformer then this? http://www.ebay.co.uk/itm/CAR-TIMER-SWITCH-TIME-RELAY-DELAY-OFF-CAR-LIGHTS-UNIVERSAL-KIT-1-105s-10A-12V/271203168131?var=570157183343&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D46150%26meid%3D5e8c43f27aec4c1092baed675673ef1f%26pid%3D100005%26rk%3D6%26rkt%3D6%26sd%3D280890951562&_trksid=p2047675.c100005.m1851 or http://www.12voltplanet.co.uk/12v-universal-interior-light-delay-timer-relay-10-sec-delay.html any alternatives? advice?

Topic by TerryJ31    |  last reply


Lots of electronic parts FOR SALE - super cheap!

 Hi,  I  have a surplus of electronic components left over from when I worked with my dad. We built stroller vending machines for shopping malls. some of the parts are kind of specific to vending machines (bill acceptors and coin hoppers), however some of the parts can have infinite uses in the hands of the instructables community. I will list what I have and please feel free to email me with any questions. I can send photos upon request. All  of these parts are brand new in the box. I live in the chicagoland area. You can email me at Kellensmetalart@comcast.net.  Check out my metal sculpture at Kellensmetalart.blogspot.com Coinco bill acceptor Mag50B - $60 ea. (27 available) Crouzet 30amp 50V relay - $7 ea. (330 available) Money Control coin hopper / part # 40-4600-78 - $50 ea. (26 available) Meanwell power supply (240w 48V 5A) / part # S-240-48 - $75 ea. (25 available) Idec power supply (50w 24V 2.1A) / part # PS5R-D24 21 - $40 ea. (20 available) Idec I/O (20 terminal breakout module) / part # BX1D-S20A - $8 ea. (72 available) Idec I/O (26 terminal breakout module) / part # BX1D-S26A - $10 ea. (23 available) Aromat reset counter / part # LC2H-F-DL-2KK-B   - $25 ea. (20 available) Microsmart PLC (output module) / part # FC4A-T16S3   - $45 ea. (27 available) Microsmart PLC (input module) / part # FC4A-N32B3   - $55 ea. (35 available)

Topic by KellenB    |  last reply


Calculating Pi using simple JavaScript

One day I was bored and wanted to calculate Pi for myself. After finding out the Leibniz formula for Pi. When it is solved for Pi one gets: Pi=4/1-4/3+4/5-4/7... And so on since it's an infinite series. Since one can see a pattern that can easily be defined I concluded that a simple program using a loop could be made. I decided on using JavaScript for its ease of use and use a for loop. The program I made at first was mainly: var Pi=0; var n=1; for (i=0;i<=1000;i++) { Pi=Pi+(4/n) n=n+2 Pi=Pi-(4/n) n=n+2 } Where the variable "Pi" is the value of Pi, "i" is the number of times the loop is repeated, and "n" is just a variable to help in the formula. This I however found could further simplified to: var Pi=0; var n=1; for (i=0;i<=1000;i++) { Pi=Pi+(4/n)-(4/(n+2)) n=n+4 } Of course the more times the loop is repeated, the more accurate your value of Pi gets, and while 1000 may seem like a large number, the value of Pi which it calculated is wrong after the 3rd decimal point. I've had it repeat over 100,000 times and it gets more accurate, however, remember that making the number of repeats can slow down and even crash your browser (I speak from experience). If you want some ready made scripting, then here's some scripting I've made which lets you easily control the amount of loop repeats. It is based as an HTML document: //Made by Masterdude var c=0; function Calculate() { var c=prompt("Enter number of cycles:","0"); if (c>0) { var Pi=0; var n=1; for (i=0;i<=c;i++) { Pi=Pi+(4/n)-(4/(n+2)) n=n+4 } alert(Pi); } else { alert("Canceled or Error in input: Input must be positive."); } }

Topic by Masterdude    |  last reply