Reading Rainbow Goes off the Air :(

Reading Rainbow comes to the end of its 26-year run on Friday; it has won more than two-dozen Emmys, and is the third longest-running children's show in PBS history — outlasted only by Sesame Street and Mister Rogers.StoryHere's the best episode (I can remember)... And Stand back! I take large steps.Part 1 Part 2 Did anyone else notice that LeVar Burton really doesn't age?

Posted by trebuchet03 8 years ago

Contest Voting Change

We have revisited our contest rules and decided that we had made a mistake in making community voting not be a factor in our decision-making process. As a result, we are reverting back to our previous rules, and picking half of the finalists based upon community voting. This change has already gone into effect for all contests that are currently running. It is rare that we change the rules of a contest while it is running, but we feel that this change should prove beneficial to all. This change is part of our ongoing commitment to do what is best for the members of this website.

Posted by randofo 6 years ago

My coilgun capacitors aren't going above 30v

I made a coilgun out of disposable cameras. i have 6 capacitors running in parallel. I followed these instructions   .When i power it on the capacitors make their usual noise and they start charging fine then when they hit 25-30v they shut off and don charge any further. What is going wrong? The power source is 2 AA battery running in parallel 

Posted by eric95204 4 years ago

Possible to turn an AC device into battery power?

Hi, Ive been searching the internet looking for a way or to know if it is possible to turn a device that plugs into an American outlet able to run off of batteries. The device I am talking about is this: from the picture it shows where to plug in the power source saying: 5V AC 1:3A Is this possible to make something to connect to it and run battery power? Sorry my knowledge of electronics is lacking!

Posted by carlino 7 years ago

YouTube Background -Get Creative-

Hey! I'm running a little competition. I want you to create a youtube background for me. Winner will get a subscription and 5* on 10 of the selected 'Ibles. What it needs: 1. To be like a grass background with a ball on it, 2. To be not taken with a digital camera, 3. Look professional, 4.Have my name (TomBuckey) in white running down the left edge. The reason I'm asking you to make one is simply, I can't.

Posted by Tom Buckey 8 years ago

Problem with text notes for images

I have tried to include notes on the images for my instructable. However, every time I save or move to another step of the instructable, the notes disappear. They do not show up when I view the published instructable. Weirder yet, After I go back in to edit the instructable and try to add a note to the same image, all of my other notes in that image show up while editing! Then they disappear again after saving or viewing the instructable. I tested it on the image below. I get the same result here. Do you see a text note on the image below?  Ever run into this? Help! Update: - I am running Windows 7 Enterprise, SP1, 64 bit - Running IE 9.0.8112.16421 I tried viewing in Chrome, and now I see the text comment. I guess I'll be switching to Chrome... at least for the Instructables website.  Andrew (aka ignoblegnome)  

Posted by ignoblegnome 6 years ago

running a camera and wireless station from batteries

Im thinking of setting up cameras away from my house and need advice on the power. basically they will be mounted on poles down fields from the house. what i plan on having is a network camera setup with the Ubiquiti wireless points ( these will form a bridge of 2 or 3 cameras and the cameras will be connected to each, with one of the wireless points mounted on the top of the house to connect to.  what i cant figure out is the power. i would like to run a power cable down the field sometime but this will be costly and i want to try this out to make sure it works. i know deep cycle batteries would be best but i cant join the rest together. i know there will be a POE connecting into the wireless box and this will be split, so how would i join this to the battery, as would a converter be needed or any other suggestions would help. thanks!

Posted by ChrisD319 2 years ago

How to run (and power) 40 16' LED strips with a single controller?

I am working in a room with an exposed beam ceiling.  I am planning on running 16' strips of 12v RGB 5050 (150 LED) up each rafter.  So in total I will end up with around 40 strips.  Each strip is listed to consume ~36w.  Tons of info on the net about controlling and powering 2-4 strips at a time. But 40?  I'm having trouble drawing out how to power the strips (power supplies + amplifiers) at the same time being able to control them from a single controller.  (A simple generic controller that has selectable colors/ blinking/ etc)  Is is possible to control all these with a single RGB controller? I would love to get into a DMX setup. But all the DMX controllers I've seen only show controlling a grid of 300 LED's.  Is there anything remotely feasible for a home setup that could control 6000 LEDs?

Posted by mrlegoman 5 years ago

Dell Inspiron (works...ish) for raspberry pi

Will trade a working black dell Inspiron for a working raspberry pi of any kind.the dell runs windows Xp but has no keyboard and is unhinged.Pictures by request.

Posted by Legitsmitty 4 years ago

Wanted: 1.5V Audio amplifier chip

Does anyone know an audio amplifer chip like the LM386 that runs on 1.5V? I'd like to amplify the output of the "Transistor Radio" Kit from Franzis. Thanks ! Mischka

Posted by mischka 6 years ago

Cmd Shutdown -i help

Hello Okay i run Cmd as Administrator and i got the correct ip adress that i wont to shutdown. When i try it in the Shutdown-i program stop working and it will not work

Posted by Kokosmel 11 months ago

External Hardrive Power

I have an external hardrive that no longer works on my desktop. I've deduced that it is not getting ample power from the computer to run. I've tried on the front port and a hub, what else should I try?

Posted by Weissensteinburg 11 years ago

Does this look legit?

Before I run this. Do you think it's legit? It's to modify the installer for Sierra Lighthouse so that it can work on XP. The File is 14mb so I don't know.

Posted by Rockerx 9 years ago

DSI add ons

Im wondering if someone could make an instructable on adding slot 2 from my broken ds to my DSI or posibly making it run 3ds games without 3D (on dsi)

Posted by GASSYPOOTS 6 years ago

usb 5v to 3v fan

I'm considering running a 3v fan from a 5v usb. can i simply put adequate resistance in series to reduce current to acceptable levels?

Posted by Toga_Dan 5 years ago

ebook link broken

Hi I noticed that this ebook Daily bread epub link is broken screen shot below. Im running firefox, on ubuntu thanks liquidhandwash

Posted by liquidhandwash 5 years ago

LASER pointer keychain Question ???

I'm taking apart my laser pointer keychain, I want to run it off of normal batteries like a 9v or AA. What would be equivalent to the 3 1.5v cell batteries?

Posted by mrshow555 10 years ago

Universal DC to DC adapter?

Does anyone know where to purchase a universal DC to DC adapter? I'm trying to run a webcam off of a specific amount of electricity from a battery pack. 

Posted by DarrenG 7 years ago

stirling engine

This is just my burning question for anyone who has mad skills in engineering. how do I build a small stirling engine generator for home use to run off a non-combustion heat source ie solar panels?

Posted by djsc 10 years ago

Power source for running three 2000rpm gear motors?

So I have built a rover drone (instructable coming up soon) and the major problem is I don't know what power source I should use. It has three 2k rpm gear motors, an Arduino and a raspberry pi. Would a lipo suffice this? or should I use something else? Image source:

Posted by droiddexter 2 years ago

Drinks can Stirling engines (UK & EU only)

These are simple coke can Stirling engines that run on one or two candles. Made from recycled coke cans, tuna cans and bottle lids. They are of a simple gravity driven design that using fishing line to connect the displacer. Each on is made by me and slightly different, so the pictures are guidelines only. Please not these are just models will not power anything useful (as far as I'm aware!).  They are £8.99+ £1.98 shipping. For more details, see my site here. (video shows slightly older version, these run the same though)

Posted by scraptopower 7 years ago

pulsejet night run

This is the simplest pulsejet you could make and costs only Rs.110 and has got a good throttling range,which you could see in the video..No need to strain much to start this engine it starts in a single attempt. this has really got good thrust,tried to show an cloth near it but i was not able to do it,so much of force from the exhaust day i will hook it up to a scale and find out the real thrust.. note: at the end when i tried to show a cardboard the engine got few holes in the welded parts..  

Posted by ganuganu 7 years ago

WiFi Jammer

Alright, I have this friend of mine who is really into pranks, and loves messing with my computer and the computers of his college roommates, so I'm trying to come up with a way to jam his WiFi to get back at him.  I'm not planning on doing anything illegal with it, just trying to mess with him and get him back for all of his shenanigans. Haha To be a bit of help, I have heard/read on google that it is possible to jam a WiFi signal (which usually runs at 2.4 GHz) with a modified cordless phone, also running at 2.4 GHz. Any ideas? Thanks!

Posted by UberNoober 7 years ago

Need help with AC motor

What is a low cost way of vary a 2 pole ac motor? I know a vfd can handle the job, but I am looking for a way under $100. Also can someone help me out with some wiring. If I have a 120 VAC motor plugged into the wall, how would I reduce the voltage enough to run LEDs off the same supply wire? In other words, I only want to have 1 plug and run a motor and LEDs at the same time. Any help would be greatly appreciated.

Posted by cory_tripp 6 years ago

Help , electric current from adaptor question

Ok kind of a noob question .. so im running 4 12v dc fans using .28 A current in Parallel with an adaptor that outputs 12V with .3 A current. my question is, will i need to add something (resistor or w/e) to limit the current  so my fans dont fry or will i be ok with nothing?.. i also want the voltage to remain at 12V , because i need them running at full  I searched the forums, couldn't find any specific answer Thanks for your help!! -Chris

Posted by cholborn 6 years ago

How long with this power a led

I have an idea for a nightlight for kids or even adults in the hallway or something.  But I am running into a problem.  The main housing for this light is going to be pretty small.  I was first planing on running this off a household electrical plug and that would work best.  But I would not know quite how to step down the power from the wall to only run 2-3 led lights.  I am sure I could get some sort of small circuit board that would drop the current.  However because of the small housing I doubt I could fit that in there.  I know I am not giving a whole lot of details but I do not want to give away my idea quite yet.  What I am wondering is how long would say 1 AA battery run 3 LED lights?  I am thinking this idea is not going to work out because people are not going to want to have to replace there battery every week or even more.  So if anyone has some input on this idea then please let me know.  The housing I think I would have to work with would be something like a pipe that is maybe 1 inch across the opening by about 2 -3 inches long.  So nut much room to work with at all. I await your replies.

Posted by jcaresheets 6 years ago

Windows 2000 running from USB stick, need done by monday

I looked over google for this, but i dont get any of it. The idea is: My school have the best Web-Filtering system, SWGfL, and have RM connect, and the IT guys installed Win XP on all the PC's, by USB stick, which i figured when the PC wouldnt boot with my memory stick in. Knowing this hack, i want to know how to install Windows 2000 onto my 1 gig USB stick and have it boot on any USB-boot enabled PC. No one suggest linux, cause its obvious im running linux and i would get banned from the school PC's for a bit, or an Afterschool at the least, and because my account on the schools lets me change my background picture (My pics: Right click, Set desktop.....) and i seem to be one of the only ones that can, and because the high contrast lets you choose win classic for a theme (cause they disabled the display control). All in short...... I want Win 2000 to boot from my USB stick, let me change the background, and have it run on my school PC's. NO LINUX!! I have a sort of grudge against it aswell as the fact my ICT teacher saw me use Ubuntu once and said "Youre only allowed to use Windows on theese pc's" He never said which one. BTW: Everyone knows i can change my BG, even our schools admin, and they know i like having the theme as windows classic. And i need this USB windows ready by Monday, my deadline.............please dont read and not respond, and dont link me to pages you find off google, they dont make sense to me.

Posted by ultimatesx9 9 years ago

programable led

I have a project that requires a board with multiple led's that each led can be programed to blink at specific frequencys. i then will run plastic fiber optitics to the location where the light is to display. i have no idea were to start with this.... so i ask - jt

Posted by wavejumper 11 years ago

Is it possible to be shocked by a car battery?

From what I've heard, one can't even feel the shock from a car battery. Is this true? Does anyone have an explanation on "Cranking Amps"? How thick should the cables be if I need run the current somewhere?

Posted by carbon 11 years ago

LED Flasher Relay

Can anyone help me build a LED flasher replay capable of running approximately 100 LED's. I would like it to alternately flash and have a strobe like effect, similar to what most emergency vehicles have!!! Thanks Dave

Posted by Jeepcop274 11 years ago


I have set myself a challenge of running a pocket radio on the power from one candle alone. I think it is possible but have found no patents or other attempts on the internet. I wondered if it might be suitable for an instructable competition.

Posted by T0BY 9 years ago

knex ball machines

Do you like k'nex? do you want instructions? do you want that u can run away when ur mom don't like it? well here u can tell about it

Posted by kutlulknex 8 years ago

Knex guns

Hey guys, I'm starting to run out of ideas for Knex guns. If you could leave me some guns I could build in the comments, it would be appreciated. Also concepts are welcome as well. Thanks!

Posted by Lucas The Boss 3 years ago

pc shutdown issues

Well, I Have an HP desktop and it shuts down randomly after fully loading windows XP, the fan runs at a very high speed and is noisy. Is there anything I can do to fix this?

Posted by cambob97 7 years ago

way to make power on a camp out

I am looking for soming alteritive to solar panoles to run a laptop  on and is fally small in size ideas plans, non gas thou i need some help with this 

Posted by the doctor who 5 years ago

What is List and Queue in Embedded Programming

Hello What is List and Queue in RTOS Programming. what is use of List and Queue routine in RTOS. Generally list means number of tasks. and queue means number of task run in queue   

Posted by vead 10 months ago

Can you run multiple mobos off one power supply??

I was wonder, as I have a whole box of assorted pentium 1's (although I still have to gather up the processors around here, I also have an old p2 sitting here somewhere). I only have a few power supplies, and really, getting more power supplies isn't a problem, but they can consume a bit of power all together. I was wondering how many motherboards it would be possible to power off say a 300 watt power supply? I was thinking of splicing some additional mobo power connectors in off other power supplies. I want to just run these all open and don't plan to use them for much more than giant hard drive controllers (4 hd's to a mobo isn't that bad, wouldn't take up much more space than 4 external usb drives).

Posted by Punkguyta 9 years ago

Challenge: Can You Beat This Scary Turbine PumpkinCutter Halloween Project ?

This Halloween project is so scary that the inventor (myself) felt shock and awe at it. I was genuinely scared at the running of this machine...and rightly so! So I figured I would spread the scariness to all who see this machine, to set the mood for a DIY Halloween... The machine in question is what I have named the Tesla CD Turbine. The CD Turbine is magnetically-coupled to a Skilsaw blade. (What I teasingly call the PumpkinCutter Attachment). The Tesla CD Turbine uses recycled CD's and neodymium magnets for rotating parts...nothing else. It can rev up to thousands of rpm. It has no bearings or seals and is magnetically coupled to implements. It runs on either compressed air or water pressure. But hey, put on a magnetically-coupled Skilsaw blade, run it at thousands of rpm, and you have a very dangerous PumpkinCutter! (Instructable is ready...if you dare!) Beat that for a wild, scary, hi-tech, cheap and recycled Halloween project!!

Posted by mrfixitrick 10 years ago

[Raspberry Pi] Does anyone have WiFi working with RetroPie?

In short, I have two Raspberry Pis - one running the regular distribution of Raspbian, and one running RetroPie, which is built on top of Raspbian. I got the popular Edimax EW-7811Un USB wifi adapter, which worked like a charm right away with regular Raspbian, but for the life of me I cannot get it to work with RetroPie*. I've gone through various troubleshooting steps, and already posted a more detailed description on the official Raspberry Pi forums (thread here if you're interested in the responses yet).  Just curious if anyone here has run into the same issue, and if you found a workaround. I'm a complete Linux amateur so keeping any explanations beginner-friendly would be much appreciated. Thanks! *This isn't for online gaming, I want to be able to do other things like voice control on the same machine, which requires internet access.

Posted by Ben Finio 4 years ago

Request: How to wire a Firgelli L16P to an arduino

Hi, everybody. If you followed my instructables you know I'm always building robots.  I'm trying to assemble a Stewart platform using Firgelli L16P linear actuators.  My problem is that I can't seem to get the Arduino PWM to talk to the firgelli RC servo interface.  I have... - 12v running to controller pins 1 (-) and 2 (+) - arduino PWM pin 3 to controller pin 3 - controller pin 1 to arduino GND (for common ground) and I'm running a version of the servo sweep example sketch, modified to run on pin 3. The actuator doesn't move. I've tested the control board with the PC control software from Firgelli (works) and I've tested the arduino with a TowerPro SG5010 I had lying around (also works). Notice the controller LED will NOT come on in this configuration, but once I remove the common ground the light turns on. So what am I missing?

Posted by aggrav8d 7 years ago

Searching on instructables

This is more of a sugestion to the people who run instructables. It would be really cool if you had a materials search as well. I know it would require some sort of entering process on behalf of the posters, but i think it would be neat.

Posted by g-tech 10 years ago

Answers are in arears by 6 or 7 years.

It may be only for Monday, but Recent answers just started, starting in 7 or 6 years ago. I'm running XP and win7 with Mozilla... Code monkeys what are you up to ?

Posted by iceng 1 year ago

What does this circuit do?

I pulled this out of a battery powered fluorescent light.  It runs on 12 volts and has a decent transformer in it. What is the purpose of this circuit? Also, how could I turn this into a capacitor charger?

Posted by JamesRPatrick 8 years ago

banger for re-enactment

I need to make a small banger that i can fit into a a re-enactmen rifle (or near it) that will reliably bang on command. i am thinking something run on butane with a piezo sparker..any ideas?

Posted by maninamousesuit 7 years ago

Multiple Keyboards

I would like to know if there is a way to hook up two keyboards and run them simultaneously but doing different things i.e. the "f" key types and f using one keyboard but say opens firefox on the other. Any Ideas would be appreciated

Posted by PlainsPrepper 10 years ago

Can't get PDF's

Running Mac Snow Leopard Safari - Clicking on PDF icon gets page with pdf link as usual, and shows me still logged in, but lately option-clicking on pdf link ends up downloading a .html file instead of the pdf.

Posted by rking 8 years ago

submersible fluorescent light

I am wanting to build this without the $189 price tag. i have found a site with the plans and pvc fittings, here , but not saving much money there either. anyone got any ideas?i will be running on a 12v battery

Posted by bigbeardan1983 9 years ago

Power 4 camera flashes with a battery 12vdc to 6vdc conversion

I would like to provide power to four camera flashes with a deep cycle battery. The flashes run off of 4 AA batteries (6VDC). Can I wire two flashes in series (6 volts each) and tie them directly into the battery? Or would I need to use a power transformer to step down the 12VDC to 6VDC, then have all four flashes running parallel to the battery? It appears that each flash needs about 3 amps to charge their capacitors. The battery I am using is 12VDC and 12 amps. Thanks

Posted by letitthink 9 years ago

Small Lightbulb question

Hi there I feel ashamed to ask this question as it is probably so simple I have some small MES bulbs.. they have 6/8V 0.15A stamped on them I want to run them off a battery... on a parallel circuit... would 4x 1.5V batteries (6V total eg 4 AA batteries) in a battery holder work for them?? and would I need a resistor to stop them blowing?? (I am trying to run 3 bulbs in parallel for an instructable... best reply gets put in the credits at the end, but you don't get royalties lol!) any help welcome Will

Posted by IllegalFun 8 years ago

6v dc flourescent lamp from 12v source.

I have a left over Coleman dual florescent bulb set up from an old lantern that has several problems. The lights work and I want to hard wire it into our camper to run on our 12v dc back up. The current lamp setup is 2 6v, 6 watt bulbs. I know I can run them in series to accommodate for the extra voltage but do I need to worry about amperage? Do I need a resistor and if so, what wattage? Am I missing something else important? Thanks.

Posted by defiant1 9 years ago