Hot Hacks, Mods & Circuitry How-Tos — Page 21 of 26 « Hacks, Mods & Circuitry

How To: Liquid cool your processor with nitrogen

In this project, using a 5GHZ processor, you'll see how to use liquid nitrogen to cool you computer down, giving magnificent speeds to boost your PC's productivity. Liquid cool your processor with nitrogen.

How To: Build a beeping electronic practical joke

Watch as Kipkay from MAKE Magazine shows you how to make something really cool for the office, with parts from RadioShack. One of the original practical jokes is the gravity activated subwoofer simulator, or better known as the Whoopee Cushion. See how to make a high tech prank... the Joke-A-Tron. This electronic prank device will beep and beep to keep your enemies on their toes.

How To: Recharge non-rechargeable alkaline batteries

Can you recharge non-rechargeable alkaline batteries? Yes you can! Gary Cutlack from techdigest.tv risks chemical burns to demonstrate.

How To: Build a small hydrogen HHO generator

Make your very own hydrogen (and oxygen) generator with a 9V battery, copper wire, and baking soda (or salt). Why? Who knows. Make sure to check your connections. For more information on this hack, including detailed, step-by-step instructions on assembling your own HHO generator, watch this how-to video.

How To: Make a speaker from a balloon, magnet, and wire

Using a balloon, magnet, and wire, you will see how to make a speaker. The sound quality is impressive, and volume can be increased with stronger magnets.

How To: Reverse a cathode-ray picture tube

Reversing the image on a CRT computer monitor can be a great joke to play on your coworker, if you have the time to play a prank like this. If you have a lot of spare time on your hands, and love to see people miserable, then this is perfect for you. This also works with television sets.

How To: Make your own printed circuit boards on a laserjet

In this video, Make Magazine shows you how to make your own printed circuit board (PCB) using a laserjet printer.

How To: Make a printed circuit board

See how to make a PCB from a schematic in this ten minute video.

How To: Repair a printed circuit board trace

Have a damaged trace on a PCB? Then see how to repair it.

How To: Cool your beer fast

Learn to instantly chill your favorite drink... from 80 degrees to 30 in less then 20 seconds. Cool your beer fast.

How To: Recharge non-rechargeable batteries in seconds

This how-to video will show you how to zap charge a non-rechargeable battery with only two wires and a car. Sounds cool, and fun, unless of course you zap yourself. Watch this video circuitry tutorial for more information on this simple, money-saving hack.

How To: Make a high-tech spy stethoscope

A stethoscope, often considered the symbol of a doctor's profession, but also used by safe-crackers and auto mechanics to hear sounds that otherwise couldn't be heard. Well, it's time to make a high-tech electronic spy stethoscope with Kip Kay in this gadget video tutorial, for only twenty-five bucks! You can hear and record heartbeats with this spy gadget, or even listen through walls!

How To: Wire a 555 timer chip for PWM

This demonstrates how to wire a 555 timer chip for Pulse Width Modulation. Items used: solderless breadboard, 555 chip, 510 ohm resistor, 100k ohm variable resistor, 1 RGB LED at 20-25ma, wires, and 9v battery. And those vertical lines are what i mean in terms of what you can see only on the camera. You can see the led light of course without the camera.

How To: Solder a resistor to an LED

A basic instruction for electronic enthusiasts. I use an RGB LED and a 510 ohm resistor as I may change from 6 to 9 volts later, but with my LEDs i could go as low as 330 ohms. I sacrifice some brightness for the sake of longer life. To choose your resistor, the value in ohms = voltage of your batteries or power supply / (as in divided by) the amperage that your LED needs to run.

How To: Make your own DIY film projector

Finding a film projector for those who still shoot film, or those who still house film can be tough. They're either sparce or extremely expensive. In this six part tutorial, learn how to make your own DIY homemade film projector for your home without shelling out tons of cash. This presentation is hosted by Dan Mikesell at Pratt Institute.

How To: Make a silicone rubber layer for a multitouch display

This is the edited version of the video that I shoot while preparing the silicone rubber layer for my homemade multitouch display. The original video is nearly two hours long so I speed up it and edited with some useful informations as titles. I hope it may help anyone who's going to prepare a similar compliant surface.

How To: Make a simple green laser projector

Here's how to make a simple green laser projector using a DC motor, pipes, and epoxy.

How To: Hack into encrypted computer data

Xeni visits the offices of the Electronic Frontier Foundation and speaks with Jake Appelbaum and Bill Paul, two of the authors of a security research paper that shows how your computer's memory can be tricked into revealing data you thought was safely encrypted, and out of the reach of others. Hack into encrypted computer data.

How To: Make an almost free multitouch pad

A simple multitouch pad made from a plastic bag, some dyed water, and a camera.

How To: Turn an ordinary hardback book into a PDA notebook

Check out this video from Make Magazine! Forget the Macbook air, there's a new lightweight portable in town - join our new video Maker (Kip Kay) as he shows you how to turn a modified hardback book in to a PDA powered "laptop" with keyboard. This will make you the cool guy in school. Just wait and see. Everyone will be your friend.

How To: Make an electric motor with junk from your drawer

Creating an electric, homopolar motor with junk from your drawer. Make an electric motor with junk from your drawer.

How To: Make a penny alcohol stove

Check out this how-to guide on constructing a penny-stove. This video will take you through each small step of making the penny alcohol stove for camping or just for the garage.

How To: Build a simple carboard magnet generator

Build this ultra-simple AC electric generator from magnets, wire, and cardboard. (And a big nail!) Light a small lightbulb, or flash a red LED.

How To: Make a pocket LED cube

This week, Bre Pettis teams up with Mitch Altman and George Shammas to make a little 3x3x3 cube made of little LED lights that you can program with any kind of animation that you like.

How To: Build a powerful tazer from a disposable camera

This video will give you shocking results. Find out how to make a couple of alterations using paper clips and a screwdriver to turn a disposable camera into a taser.

How To: Hack together a TV remote

This video teaches you how to make a device to control your TV without using the remote.

How To: Convert headphones into a PC microphone

A video that shows how to convert an ordinary headphone into a mic.

How To: Make a USB fan out of old CDs

Sweaty summer day by the computer? Office A/C broke? Watch this how-to video! You can make a simple USB fan using a compact disc, a USB cable, and a small fan motor. It's quick and easy! Don't suffer from the heat. Watch this video tutorial and with these circuitry tips, build a simple USB fan out of some old CDs.