Hot Hacks, Mods & Circuitry Posts

How To: Light a light bulb with a potato battery

Following on from Edison's first lightblub moment back in 1879, the OU's Stephen Serjeant experiments with an alternative power source - the humble potato. Create a potato batter with a couple of screws and a light bulb.

How To: Make a Super Cheap One-Way Check Valve

If you're going to build yourself a water gun to cool down this summer, or maybe just a useful water pump, you'll need some check valves. However, the most expensive parts of a water pump or DIY super soaker are usually the check valves. So, let's make some from scratch for as little as $0.35 each.

How To: Block RFID Signals, Build an RFID Reader Detector, and Make Custom RFID Tags

RFID chips are everywhere. They're in passports, credit cards, and tons of items you've bought in the last 5 years or so. Big retailers like Walmart started using tracking products with RFID as early as 2004, and today, they're used in everything from mobile payments to hospital record systems. Chances are, unless you're a hermit (in which case you wouldn't be reading this anyway), there's an RFID tag within a few feet of you. Photo by sridgway

How To: Program double input Wiimote detection with GlovePie

You can connect your Nintendo Wii Wiimote to your PC using GlovePie input emulation software and a bluetooth connection. Learn how to program your PC to detect motion from dual input the Wiimote using GlovePie. You'll be able to connect two Wiimotes to your PC.

How To: 10 Unique & Practical Ways to Repurpose Your Old Hard Disk Drives

At one point in the '90s, about fifty percent of the CDs produced worldwide had an AOL logo. About fifty percent of the CDs in my home still have that AOL promise of 500 free hours on them. Though they never got me to join their internet service, I did get a lifetime supply of coasters. Thanks to the rise of high-speed internet access and bigger and better hard drives, there's no reason for companies to snail mail any more of those obnoxious plastic discs.

How To: Build a mini hovercraft with household items

Learn how to build a mini hovercraft. With a few items found in almost any desk or tool drawer, you can make your very own mini hovercraft capable of gliding over any flat surface.

How To: Hack Your Old Computer Mouse into Retro Wireless Bluetooth Mouse!

Since most devices these days are mobile and wireless, a lot of people have a bunch of old hardware from a decade or two ago sitting around unused, just wasting away in dusty boxes. Look familiar?

How To: Lock and Unlock a Safe

This is an easy step by step tutorial how to lock your jewels in a hotel room or in a public safe. Be aware that in a public safe it is more secure to use the second method of locking by a magnetic card, not by a PIN code that can be easily seen by someone nearby.

How To: Make a satellite dish Wi-Fi antenna for free internet

Need internet but don't want to pay? Well, try lusting of those around you by picking up their Wi-Fi signal. Live out in the boondocks? No problem… if you have an old satellite dish laying around.

How To: Hack Your Electricity Meter

This video will show you what you'll need to know to hack a digital electric meter. You'll need 2 magnets, one much bigger than the other, an AC adaptor that you'll cut into pieces, or some speaker wire, distilled water, electrical tape, a knife, some plastic wrap, and a plastic cup. Remember, this is illegal, and shown only for educational purposes.

How To: Build an iPhone/iPod charger cable

Systm is the Do It Yourself show designed for the common geek who wants to quickly and easily learn how to dive into the latest and hottest tech projects. We will help you avoid pitfalls and get your project up and running fast. Search Systm on WonderHowTo for more DIY episodes from this Revision3 show.

How To: Fix Dead Lithium-Ion Batteries That Won't Hold a Charge Anymore

"What is dead may never die." That's easily one of the best lines (and episode title) from HBO's Game of Thrones series. While the saying may ring true for the Ironborn, it's not quite as catchy when it comes to batteries.

How To: DIY Stick Welder from Old Microwave Parts

Lurking inside your old junk microwave is an abundance of useful parts that can let you melt metal, spot weld, and make electrifying Jacob's ladders. You can even make a powerful AC arc welder, perfect for making hard-to-solve puzzles and even makeshift weapons for the zombie apocalypse.

How To: Mod Your Old iPod 30-Pin Dock into a Bluetooth Speaker for Your iPhone 5

If you bought the new iPhone 5, you've probably been less than thrilled with the lack of cases and accessories that you can use it with. Docks are no exception—users were disappointed to learn that Apple has no plans to even make one for the newest addition to the Apple family.

How To: Eavesdrop from a Distance with This DIY Parabolic 'Spy' Microphone

Want to find out if your neighbors are talking about you? You could always hack their webcam or turn your iPhone into a secret spy camera, but unless you have a key to their house, that could be tricky to do without getting caught.

How To: Make a high speed photography trigger with an Arduino

High speed photos are very artistic and look awesome, but taking them without special equipment is nearly impossible. Without this hack and an Arduino, that is. This video will teach you how to use an Arduino and other electronic components to make a DIY high speed photo trigger and take more awesome shots.

How To: Build a weatherproof compact high gain WiFi antenna

See how to build a weatherproof compact high gain WiFi antenna for under fifteen dollars! This homemade WiFi antenna should be enough for most applications, since it's three times more powerful than a standard antenna.

How To: Hack Christmas Lights for Custom Holiday Lighting Patterns

General Electric isn't known for their Christmas lights, but maybe they should be, because their GE Color Effects are pretty awesome. Especially the LED Color Effects G-35 String sets. And especially when someone named Darco hacks them.

How To: Open a power supply without destroying a transformer

First of all, please DO NOT attempt to open any power supply and tweak what's inside unless you know what you're doing and/or are a professional. With that said, this circuitry video will teach you how to crack open a wall transformer power supply without destroying the transformer.

How To: Make a Solar-Powered Fan Hat

It's hot this summer, but it's not that easy to cool down when you're on the go. You can't take an air conditioner with you, and a handheld fan will just tire you out, so you'll need to find more creative ways to cool down when you're on the go. One of these ways is a DIY solar-powered fan baseball cap.

How To: Convert Your Classic Game Boy into a Powerhouse Emulator That Plays Practically Any Retro Game

If you've got old game consoles lying around and aren't sure what to do with them, there's no shortage of projects you can undertake. From turning a Game Boy and Wii Remote into an Android phone gamepad to combining a GameCube and N64 to make a hybrid console, there's something for everyone.

How To: Turn a pen and film canister into a rapid-fire airsoft machine gun

Make a homemade airsoft machine gun with Kipkay! You will need a basic ball point pen, a film canister or medicine bottle, and an assortment of Airsoft pellets (6 mm size pellets work the best). You'll also need access to a drill, and a hot glue gun.

How To: Build a low cost portable hamstick antenna

If you're looking for a low cost solution for a portable hamstick antenna pole for your ham radio, then check out this video.

How To: Repair a cracked or broken circuit board

Step by step guide to repairing circuit boards Yes, I know, my hands are shaky.

How To: Use a breadboard, also known as a protoboard

This two-part video introduces you to the breadboard, also called a protoboard, used to build electronic circuits without soldering. The first part of this presentation describes the features of a breadboard.

How To: Turn your webcam into a magnifier

Hack your webcam into a magnifier by adjusting the focus lens Turn your webcam into a magnifier.

How To: Make a Spot Welder for Cheap!

A typical resistance spot welder can range in price from about $200-$800, but with a little resourcefulness and a bit of free time, you can make one like this for about $10 or less.

How To: Hack a coin operated laundry machine

Man, it's laundry day and once again you have NO quarters. Well, check out this video and you'll never need quarters again. This how-to shows how to pick the lock on a coin operated laundry machine and then rig it up so you'll never need to pay again. Sweeeet.

How To: Make a PVC Hand Pump to Move Water, Compress Air, & Create Vacuum

When you're using vacuum power, moving water, or compressing air, it's more than likely being done with some sort of pump. I'll be needing a pump for some of my future projects, so in this tutorial, I'll be showing you how to make your own customizable PVC hand pump that will let you do all three.

How To: Convert Your Old Apple iMac G4 into a Cable-Ready HDTV

Most of us have traded our desktop systems for laptops, tablets, and mobile devices, meaning there's a lot of outdated hardware sitting in attics. Want to give your old computer a new purpose? Matthew Chappee turned his iMac G4 into an HDTV using the guide by Dremel Junkie. One thing to note before you take on this project yourself is that if you want to use it to watch cable, you'll need a converter box to get around the MPAA's HDCP restriction. But, a converter box is considerably less expe...

How To: Extract an RFID chip from a card & make it wearable

Here's how to remove the RFID chip and antenna from a London Oyster travelcard. You can then put it in anything you want. You need a jar and acetone.

How To: Hack Software & Run a Trial Program Forever

With this video tutorial, you'll learn how to hack demo versions of applications such that they'll run indefinitely. You'll just need to modify the date and time on your computer. Learn how to use trials of programs without them ever expiring instead of buying the real thing with the hack outlined in this how-to video.

How To: Quick-N-Dirty Circuit Board Repair: How to Patch Faded or Corroded Traces with Pencil Lead

You may already know that you can build a functional circuit on a sheet of paper with the graphite from a pencil, but you'd probably never think of using it to fix an electronic device. This same principle can be used to bring back a bricked phone, but can also repair a damaged or corroded trace in a printed circuit board. Redditor 404ClueNotFound spilled water on his favorite computer keyboard (like so many of us have done before). The damage was minimal, but after drying it out, one key sti...

How To: Hack a satellite dish into a WiFi signal booster

There are many ways to recycle a satellite dish and this is one of them. In this video tutorial, you'll learn how to hack an old satellite dish into a biquad WiFi antenna. For detailed, step-by-step instructions on building your own audio signal booster, take a look!

How To: Make a Super Secret Batman-Style Bust Switch for Your Batcave (Or Just Your Lights)

Remember the 1960's American television series Batman, with Adam West as Bruce Wayne? It was waaaaay before my time. The caped crusader that I'm more familiar with is actually this one... When I first heard of Adam West, it was him doing the Batusi on The Simpsons. I had no idea what was going on, so I looked up Adam West and his sensual dance and found myself face to face with the 1960's Batman.

How To: Build a Deadly Motion-Activated Airsoft Turret Gun

It's tough out there on the battlefield, especially when your stuck in the trenches and your comrades are dropping like flies. There's no hope. At least, until the next airsoft battle.

How To: Build a Remote-Controlled Water Gun (Or Flamethrower!)

You can do a lot with water guns. Have trouble waking up? Make a water gun alarm clock that (almost) no one could sleep through. Prefer real ammo? Turn your water gun into an airsoft BB gun. And if you don't have one, you can even make your own.

News: Infrared LEDs Protect Your License Plate Number from Police Cams

Got a knack for speeding? Like running red lights? Believe or not, the police have better things to be doing than pulling you over, like catching real criminals. That's why more and more cameras are popping up at known speeding zones and on street corners—so the cops can clean up the streets, compared to just ticketing them.

How To: Make an AC Arc Welder Using Parts from an Old Microwave, Part 1

In a previous article, I demonstrated an Arc Welder made using parts from old microwave ovens. Video: .

News: Mod a flashlight into an IR night vision light

Record stealthily, in the dark. This hack is simple and will turn any LED flashlight into an infrared night vision light you can use with any video camera.