Instructables: exploring - photos - technology - popular Wed, 1 Jul 2015 05:01:06 PDT BLOX v1.01 ohm's law dhruvil_patel FIG:--1Ohm's Law deals with the relationship between voltage and current in an ideal conductor. This relationship states that: The potential difference (voltage) across an ideal conductor is proportional to the current through it. The constant of proportionality is called the "resistance", R. Ohm...
By: dhruvil_patel

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Sun, 8 Jul 2012 06:47:30 PDT
Resisitor color code dhruvil_patel In resistor color coding first we have resistor of 4bands in this the first 3band are near and lest one are far... last band use for tollerance. The Resistor is shown in fig 1 Band is BROWN 2 Band is BLACK 3 Band is ORANGE 4 Band is GOLD now,,, 1st and 2nd are digit so, 1 Band is BROWN number f...
By: dhruvil_patel

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Wed, 11 Jul 2012 07:27:24 PDT
USB-ports in your car Kaj_s Why? I was tired of mucking about with cigarette lighter-adaptors, extension cords and power splitters, just to power my navigation system, dashcam and charging our mobile phones, which all run on USB power. Neither me nor my girlfriend smoke, so the ashtray in my car has had nothing to do since the...
By: Kaj_s

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Fri, 22 Mar 2013 00:30:10 PDT
How to Bypass BIOS Passwords Rajiv Priyadarshi BIOS passwords can add an extra layer of security for desktop and laptop computers. They are used to either prevent a user from changing the BIOS settings or to prevent the PC from booting without a password. Unfortunately, BIOS passwords can also be a liability if a user forgets their password, or ...
By: Rajiv Priyadarshi

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Thu, 28 Jun 2012 02:31:35 PDT
How to Make a Model Volcano Erupt elenwaren Model volcanoes are a staple of student science fairs. They can also be a lot of fun for a summer family project. Making a model volcano erupt is a simple process. This article will tell you how to make a model volcano erupt. Difficulty: Easy ...
By: elenwaren

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Mon, 15 Nov 2010 23:13:18 PST
How to Disable / Delete the Administrator Account from Windows 7 Computers Abunelaiyo First, open "All Programs" in the "Start Menu" and then click on "Accessories". Look for "Command Prompt" and right click it, then select "Run as administrator" Click on "Yes" if it asks you, Do you want the following program to make changes to your computer? Once command prompt opens, type: net use...
By: Abunelaiyo

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Sun, 19 Aug 2012 18:58:42 PDT
How to capture/record desktop video using VLC media player. faizans97737 Hello guyzzzz... In this instructable i will tell you how to capture or record desktop screen video using VLC media player. So lets start.... 1) Open VLC media player. 2) Click on Media-Open Capture Device. 3) A new box will open. For Capture mode, select Desktop. 4) Set desired frame rate to 10.00...
By: faizans97737

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Thu, 27 Jun 2013 01:36:56 PDT
LiPo-Powered Arduino Radioactive_Legos Let's face it, 9V batteries suck.  They don't last long, they're expensive, and did I mention they don't last long?  I work on and run several electric RC cars, and because of  this I own a lot of Lithium Polymer (LiPo) batteries.  Nowadays you can get them for pretty decent prices, and if you know ...
By: Radioactive_Legos

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Wed, 8 Aug 2012 17:23:30 PDT
HAL 9000 computer/robot BOT4 This is a HAL 9000 robot. It has 2 hard drives, 1 cd drive, 2 microphones, 1 internal speaker, 4 cooling, and a light up eye. HAL 9000 can respond to voice commands and can read emails out load. HAL 9000 can also switch to a desktop mode which brings up normal home computer settings. It runs on 2 o...
By: BOT4

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Fri, 5 Aug 2011 14:51:10 PDT
RemoteJack: Arduino awaits in ambush to thwart unwanted TV channel changes techbitar WARNING: An Instructables bug keeps removing the name of the IRremote.h library surrounded by following the #include statement in my RemoteJack code at the bottom of the guide. Please remember to put it back before you compile and upload to Arduino.  INTRODUCTION For those of you who are still st...
By: techbitar

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Sun, 16 Sep 2012 10:40:33 PDT
Hooking up a laptop to an old school RF TV crysmoore Wanna hook up your Kinect or run a program like Processing on an old vacuum tubeTV but the only input you have are fork leads and screw terminals? This diagram and a couple of pieces of hardware will help you make some pretty cool projects. Depending on what kind of computer you have, will determine...
By: crysmoore

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Fri, 11 Jan 2013 16:51:48 PST
How to reverse a DC motor using buttons. out-of-the-box In this short video I show you how to reverse a DC motor using buttons instead of a DPDT switch or any remote. Recently I wanted to make a DC motor spin in one direction and in the other direction for a project. I wanted to use buttons so the DPDT switch was out of the question, and I didn't want to...
By: out-of-the-box

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Thu, 6 Jun 2013 18:18:04 PDT
Window to the Night (Night Vision) Jake Morton The idea of having a night vision device as a child was unthinkable! Only a few years ago, instructions came out on the internet to make this child-hood fantasy a reality. I decided to make my own! This instructable below won't go into detail on the makings (there are numerous sources and dedicated ...
By: Jake Morton

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Sun, 1 Jun 2014 20:37:19 PDT
Android Controlled Garage Door Opener mcgrasea My project is an Android Controlled Garage Door Opener. This type of project has been done before, but with extensive hardware, such arduino boards, servers, etc., and involved complicated coding, and money. I did it all with minimal hardware, no coding, and at a total cost to me of only $15. With...
By: mcgrasea

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Tue, 1 Nov 2011 21:32:29 PDT
Save $$$, Get A Like New Laptop (or other) Lithium Battery Pack For FREE! ruggb Well, you'll have to work for it so it isn't totally free. Basically, MANY lithium battery backs can be reset back to almost new condition. I don't fully understand the reason the "smart" internal controllers become dumb and require a reset. I also don't understand why manufacturers don't provide th...
By: ruggb

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Tue, 14 Aug 2012 12:42:35 PDT
Using Visual Basic 2010 to control Arduino Uno techbitar I know this has been done in the past a few times so here's one more. This is a skeletal Visual Basic 2010 and Arduino Sketch that I mixed together to test the PC to Arduino Uno connection via serial. It simply turns LED 13 on or off.  The Visual Basic 2010 code assumes you have Form1 with 2 button...
By: techbitar

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Sat, 24 Sep 2011 08:35:55 PDT
Speech Recognition with Arduino leandro4b In this project I use BitVoicer’s speech recognition features (, one Arduino board and one electret microphone ( to control a few LEDs. This project is similar to the one in my first post (
By: leandro4b

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Wed, 19 Dec 2012 08:15:41 PST
A FREE Multimeter Workstation! PS118 I saw this instrutable by Mike63 and knew immediately I had to do it.  But why just copy when you can up the ante! I built mine to fit CenTech (Harbor Freight) 7-function multimeters.  These are $10 normally, but HarborFreight likes to use them as one of their "loss leaders", which means if you're ...
By: PS118

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Thu, 24 Apr 2014 11:13:34 PDT

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Sun, 18 Aug 2013 03:05:28 PDT
3D Printable Arduino Protection Box megaduty Yo, New R3 version plate and box uploaded!  Including an Ethernet shield R3 box top addition! I've been pushing out multiple Arduino Uno builds and needed a secure plate and box combo that could keep assets safe during a fall or tumble and would allow for under plate wire runs.  I got tired of ord...
By: megaduty

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Fri, 24 Feb 2012 12:23:08 PST
Ammo Can BOOM box Medic55 This was my first attempt at building this speaker BOOM box and it turned out great.  Bellow is the list of parts I used. I also re wired the IR sensor the outside the box so I can use the remote without opening the box. I rewired the FM antenna to the outside also. Every hole I drilled was sealed w...
By: Medic55

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Wed, 30 Apr 2014 09:24:18 PDT
Tesla Coil (Lit a lamp wirelessly) sheariahna Homemade mini Tesla Coil. It is mini but i can lit a fluorescent lamp What you need 1. Magnet wire 0.2 mm 2.  PVC pipe 3.  Alumunium foil 4.  Magic twist tie 5.  Stick (like ice cream stick or other stick) 6.  Glue gun 7.  Solder 8.  Fly swatter 9.  Clear coat 10.  Screwdriver 11.   Reguler wire 1...
By: sheariahna

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Thu, 13 Feb 2014 05:55:42 PST
Custom MP3 Dock with Electronic Amplification ilpug Wow I haven't posted in a while. I've been in college.  Anyway, here's a look at something I made in design class a few months ago. I have an off-brand MP3 player I got an an office store for around 40$ (US) a while ago. My room mate bought a little external amplified speaker that was extremely lou...
By: ilpug

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Tue, 23 Jul 2013 13:13:38 PDT
70s Terminal PC alpinedelta This is a computer which i designed and constructed to look like a 1970s data terminal. The case is built from 1/4" hardboard (similar to MDF), and painted with many layers of both gloss and textured paint. The computer features a 22" LCD display with a Plexiglas screen protector. Also, a mid-80s I...
By: alpinedelta

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Mon, 15 Jun 2009 19:12:15 PDT
Turn Your Smartphone Into a Metal Detector sensor Mahir Asrani What Is Metal Sensor....? A metal detector is portable electronic instrument which detects the presence of metal nearby Metaldetectors are useful for finding metal inclusions hidden within objects such as metal objects buried underground. They often consist of a handheld unit with a sensor probe whi...
By: Mahir Asrani

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Fri, 11 Apr 2014 06:37:38 PDT
Paperduino Tiny ok1cdj Build Arduino compatible board on piece of paper. Paperduino Tiny is very cheap and easy to build Arduino compatible board with USB and software compatible with Digispark board. Paperduino Tiny include an ATtiny85 microcontroller and come with USB interface. Coding is similar to Arduino, and it us...
By: ok1cdj

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Thu, 3 Apr 2014 08:46:08 PDT
Arduino standalone web enabled bell SimonUK Inspired by this post, I wanted to create an Arduino powered bell that was completely standalone. With a little PHP and (if you like) some jQuery on any website, you can make this bell ring whenever a specific action is performed. This Arduino stack is wifi; once it's been configured, you can simp...
By: SimonUK

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Sat, 17 Dec 2011 12:58:10 PST
3D PRINTER X TATTOO MACHINE appropriate audiences In october 2013, a famous design school in Paris, ENSCI les Ateliers, hosted a workshop organised by the French Ministry of culture. The idea was to use images, videos and sound fallen in the national pubic domain and use them in a sort of “Mashup”. The event was called Public Domain Remix. The stu...
By: appropriate audiences

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Tue, 25 Mar 2014 04:31:59 PDT
EZ Robot Controlled Lost in Space B9 Robot dschulpius This is my full sized exact replica of the 1960's TV show's Lost in Space B9 Robot. I've been building it for about 2 years now. It's animation is controlled by 3 EZ Robot control boards (EZB) and his voice files were made by the origi...
By: dschulpius

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Sat, 22 Mar 2014 08:10:13 PDT
Super Nintendo (SNES) Arcade Machine Nzen Mods The Super Nintendo. A source for some great titles and classics such as Donkey Kong Country, Super Mario World, Super Metroid, and anything else "Super". A great way to have all of these classics relived and put to new use is making an arcade machine based on the famous SNES. To bring a new environm...
By: Nzen Mods

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Tue, 11 Mar 2014 19:19:02 PDT
Cheap Macro-Softbox / Bouncer for external Flash / Speedlight (DSLR) confu Here´s a really quick and dirt-cheap way to modify an external flash for using it in macro-photography. An external flash (at least one mounted on the top of your camera) won´t help much trying to illuminate an object right in front of your lens. So you have to get it´s light to go where you need i...
By: confu

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Fri, 14 Mar 2014 15:50:17 PDT
How to calculate charging time & energy of your supercapacitor. ilovegm In light of all the instructables using supercaps as a power source, I present... Q/Q_max =1-e^(-t/RC) & E=1/2 CV^2 With the first equation, you can find the percentage of charge (Q/Q_max) X (100%), by substituting the time elapsed, resistance of charging circuit and capacitance of capacitor. Assum...
By: ilovegm

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Sun, 8 Jul 2012 00:57:19 PDT
Real-Life, Playable Version Of “Flappy Bird” Inside A Box fqiu I made this real-life, playable version of "Flappy Bird" using Arduino Duemilanove, 3 servo motors, 2 buttons, a speaker, a reed switch, and handful of rare earth magnets. First, find a box to make the frame of the game and two small dowels to create the rolling background. Those dowels are control...
By: fqiu

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Tue, 18 Feb 2014 20:59:37 PST
Recolector de piezas con una aspiradora / Vacuum Collector manacho ESPAÑOL Este recolector lo fabrique por la necesidad de limpiar la plataforma de mi cortadora láser CNC peo al mismo tiempo recolectar las piezas útiles. Tambien puede ulilizarse para recoger pequeñas piezas como merceria, dulces, legos etc. de una manera facil y rapida. Materiales: 1 Botella de So...
By: manacho

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Thu, 13 Feb 2014 14:42:17 PST
Guide to gyro and accelerometer with Arduino including Kalman filtering Lauszus This guide was first posted at the Arduino forum, and can be found here:,58048.0.html I just reposted it, so even more will get use of it. The code can be found here: Hallo ever...
By: Lauszus

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Tue, 3 May 2011 07:26:18 PDT
Mini Test Hooks stevenarango Well Guys/Gals   Here I Have a Set of Mini Test Hooks. To use with  A Multimeter. Sometimes its hard to get to Small places. All you need is Two Mini Hooks. $1.20 Each One Set of Alligator Clips 30 Cents. 1st Dismantle Clips, Pull Back on the base and the metal bit will come out, its Bend  so unb...
By: stevenarango

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Tue, 28 Jan 2014 23:08:39 PST
Wireless Mailbox Alarm with Phone alert eddevine 1x Alarm kit Auto-Dialer (ebay $10-$20) 1x Door/Window Sensor (included in alarm kit) 1x Keypad/Control Unit with AC Adaptor (included in alarm kit) 1x Telephone Cable (included in alarm kit) 2x  Cable Ties (home depot or Lowes) A simple way to set up an alert system, after installed, you still h...
By: eddevine

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Wed, 18 Dec 2013 09:42:06 PST
Homemade loudspeaker using LM386 Timofte Andrei Hi! Today I'm gonna show you my latest project which is a loudspeaker powered by a LM386 audio-amp. My inspiration came from a project made by my friend Nicu Florica and because I had few LM386 chips around, I've managed to make a project of my own. I've printed the schematic on a piece of tagging p...
By: Timofte Andrei

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Fri, 31 Jan 2014 05:15:13 PST
Industrial Arduino! Low cost industrial pick and place machine GeekSheek I have wanted to join this community for ages, so now the time has come. And i wanted to share this with you all. So this is my first time, be gentle.......  I have always debated wether you could use an Arduino for industrial use...... And well i think i may have answered that question.  How the ...
By: GeekSheek

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Sat, 25 Jan 2014 08:20:24 PST
Solution: avrdude stk500_getsync(): not in sync resp=0x30 error for Arduino N.fletch So the reader is aware: This article covers the main causes for this issue, but some of the other Instructable users have found somewhat "niche" causes to the issue that were not covered in this article and are discussed in the comment section below. If this article does not solve your problem, plea...
By: N.fletch

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Tue, 26 Jun 2012 17:13:25 PDT
How to check AA/AAA alkaline battery using a voltmeter msurguy We all run into a situation when batteries in our remotes, toys, keyboards/mice run out. If we don't know how to check a battery we might throw out a perfectly fine battery (especially when we have a pile of them somewhere in the drawer).   This electronics tip has to deal with checking common alka...
By: msurguy

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Wed, 11 Jul 2012 15:24:20 PDT
Gazebo from Satellite Dish graydog111 This is a gazebo I made several years ago out of an old 10 ft fiberglass satellite dish when they became obsolete.  It was either do that or make it into a fish pond or the world's biggest birdbath.  I removed the dish from it's mount and dug holes and set the railroad cross ties.  I could have use...
By: graydog111

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Thu, 16 Jan 2014 11:31:33 PST
Take a trip on the internet via command line. Computothought The graphical user interface is very easy, but if you are to be a real computer administrator, you will need to use the command line at one point or another.  This is especially true with virtual systems where memory is at a premium. Here were are going to take a trip on the network, all from the ke...
By: Computothought

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Thu, 24 May 2012 11:35:04 PDT
Clock with thermometer using Arduino, i2c 16x2 lcd, DS1307 RTC and DHT11 sensor. Timofte Andrei Hello! It's been a while I've didn't posted anything on Instructables, but now I made a simple project that I've seen on internet in various forms. I managed to build a code using other codes I've found on internet and I got to say it's working good. For this project you need: - Arduino Uno - 16x2 L...
By: Timofte Andrei

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Thu, 16 Jan 2014 00:51:57 PST
USB Dog Identification ctx1985 I sometimes worry about losing my dog. Even though he's microchipped and I keep a good eye on him, you never know, right? So I decided to add a little extra piece of ID just to give me piece of mind, if nothing else. What you'll need: -A computer with a word processing program -An old USB drive (w...
By: ctx1985

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Sun, 12 Jan 2014 10:49:19 PST
How to build a Bartop Arcade djkurtz92 Based on some inspiration from Instructables, and a love for vintage video games I decided to build my own bartop arcade. Some one built one on here that I borrowed some of the methods. I too don't like emulation. I like the originals. I could give Step by Step directions on how to build this but a ...
By: djkurtz92

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Sat, 22 Jun 2013 13:43:05 PDT
Homemade SNES Arcade Machine djkurtz92 This is my second entry in the homemade arcade machines. A Super Nintendo in a bartop arcade machine. I'm now up to 3 machines. Some of these pics are also of the Sega Genesis Arcade machine that I did not make build pics for. My next machine will be an original xbox running MAME with hundreds of or...
By: djkurtz92

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Fri, 3 Jan 2014 15:29:58 PST
DIY USB Flash Drive + Card Reader shahbazali4u I had an old card 4GB SD card lying around for some time. I decided to make good use of it. 1) I bought a cheap 4 in 1 card Reader. 2) Open the plastic casing of the SD card as well as the card reader. 3) Permanently glue the SD chip into the card reader SD card slot 4) Put the cardreader inside its...
By: shahbazali4u

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Sun, 22 Dec 2013 02:24:22 PST
Half-Inch LED Cube: Arduino controlled 3x3x3 with SMD LEDs! one49th Taking on the task started with me thinking 'Hey, I could make a smaller LED cube using SMD LEDs".   Yes, the idea was to solder the surface mount LEDs in space!    And yes I did it (the "Why" question remains).  Unpolished video:   I had built a "normal" 3x3x3 LED cube some years ago, kinda f...
By: one49th

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Sun, 1 Dec 2013 16:40:17 PST
DIY Upgrade/ Supercharge your LED Keyboard/ Laptop Light bhvm Hello again! Working late night with dingy dim Laptop lights is not the best idea for your eyes. Here we shall Take a normal Ebay LED laptop Keyboard light, and Modify it for better colour (Neutral white) and Brightness. In the first Picture, you can see our final Project. I am afraid that camera w...
By: bhvm

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Sat, 23 Nov 2013 22:28:59 PST