Utah Nature has a how to on making a LED emergency light – “This LED array uses 15 LEDs housed in a 1 inch PVC connector. Each LED has its own 100 ohm resistor to limit the current and reduce the voltage. The LEDs have a 20 degree light dispersion resulting in a beam much […]
Idioticgenius made a dual chambered air cannon, 90 psi and an interchangeable barrel – “I started this project when a friend of mine put a Shrader valve on a large rectangular assembly of glued PVC, or what he called an air cannon :-. He used a ball valve and a one inch SCH 40 barrel. […]
Ted has a round up of just about all the ways of charging an iPod and/or making a DIY battery pack – Link.
Here’s how to make a solar thermal heater from a bunch of old junk, including a refrigerator grill [via] – Link.
w yah – our Jake, here at MAKE made a TV-B-Gone, here’s how you can make one too! – “This is a hat with integrated Tv-B-Gone and a couple added features such as rapid fire mode which will turn off (and on) the most common tvs more frequently and constant on mode which will repeat […]
Here’s a clever mod for any bag so you can carry a bike U-lock – Link.
Cocoontech writes “This How-To will show you how you can use a Maxbotix Ultrasonic Sensor to measure the salt level in your water softener. It also explains how to use this data in a home automation environment with touch screens.” – Link.
