Hacks Mods & Circuitry: Page 19

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

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

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!

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.

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.

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.

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.

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

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

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.

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.

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.

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

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.

Hand soldering a QFN component is almost impossible unless you have the right tools. Among these tools is the SchmartBoard|ez prototyping board. Here we hand solder a .5mm QFN component.

This method is good for replacing SMD chips without damaging other IC's. See how to desolder using a lighter.

This video is a detailed description of how to make an IR pen. It even shows a diagram and how it works!

A cool way to test a LED bulb emitter! Plug it in to your multimeter and see it light up. It's really cool!

This OzLabs video demonstrates how to build an LED sign using their flatheaded LED strips.

This tutorial illustrates how a wireless pinhole spy video camera can jam wireless internet or WiFi signals.

This shows the simple steps to making some sweet and strong led glowsticks.

This video tutorial from OzLabs will show you how power the one-watt high powered LED using 120 volt source using a 12 volt adapter.

Sure you could take $2.50 and just buy some batteries, but how much fun would that be? Watch this video to learn how to make a coin battery.

Don't throw out those old components. Here's how to make a USB-powered fan out of old computer parts.

This is a older VHS, remastered version of my introduction to holography in which Thomas Grillo demonstrates two holographic optical table layouts for making transmission master, and reflection copy holograms. Recorded by Thomas Grillo in 1997 at Parallax Holograms Studios in Mississippi.

I show you how to hack your old keyboard to make a wallet in minutes.

Cheating At Guitar Hero: An introduction to show controllers, by David Randolph from Systm.

We've got half a day of wiring to build the Wireless Access Truck out of an EVDO modem, a Wilson Electronics Cell Phone Booster, a 12V Mini ITX PC and a WiFi adapter... Hit it.

While breadboarding may seem like some odd combination of snowboarding and consuming the fluffy pastry at the same time, it's actually just the technical term for using a construction base to build a prototype electric circuit. Breadboards are solderless so they're great for circuit design and are reusable.

Calculating resistance and power isn't hard... and, as David explains, knowing Ohm's Law and the Power Triangle can be darn useful when you're designing a project, sorting out power supply issues, or want to keep from burning your car down.

This video compilation shows you how to create various LED and fiber optic hacks and projects the average Joe can assemble to create one hell of an awesome, wild party.

Watch this video to learn how to hack together your own Jacob's Ladder optical illusion cassette tape toy.

Watch this mod video to learn how to install your own window into your computer case or tower using simple tools and cast acrylic. Follow the easy steps to cut a basic shape or get creative and cut your own shape.

Here's how to electrocute a hot dog Redneck style, in under 30 seconds. You need a power cord, some nails and a hotdog to cook or rather heat the meat. This also works with sausages. Be careful, electrocution kills!

Now this is one how-to video you probably don't come across often. While most jewelry makers and welders probably purchase their soldering irons, it's actually possible to make your own soldering iron out of graphite pencil, car battery and jumper cables. We know it sounds like you're going to end up lit up like those much-parodied dads trying to set up Christmas lights on the rooftop during the holidays, but this process actually works quite well.

Watch and learn how to make this awesome DIY toy car that runs off solar power. This makeshift mini-vehicle is made from a plastic bottle, small motor, tires, supports and a solar panel. See if you can replicate this interesting solar toy, or see if you can come up with a better and cheaper design!

Check out this how-to video and learn how to build a SAFE hydrogen generator. Be sure that you test volts vs. amps for safety reasons! Follow along with this instructional video, and start making some sweet, sweet hydrogen.

This how-to video offers step by step instructions for how to build a stainless steel hydrogen generator for $15 dollars. You will need six stainless steel outlet covers with weather seal, 4 screws and nuts, 12 nylon washers and silicone. Learn how to make this hydrogen generator by watching this instructional video.

This video gives you the simple steps of turning your ordinary stereo into an iPod stereo with just a headphone jack.

TOUCHPAD HACK - This video tutorial shows how to transform a touchpad into a useful mini graphics tablet with some simple, everyday items. You will need a 1.5V battery, a small ball bearing, and a Philips head screwdriver. Watch this video tutorial and learn how to transform a touch pad into a miniature graphics tablet.