Finally, a high powered PIC controlled marshmallow gun – “This device uses a PIC12F629 to create a burst of 30 high voltage pulses. The PIC activates a 1000 volt N-Chan FET driving a standard ignition coil. After the ignition, the PIC goes dormant until activated again. Most of the electronics, including the battery and momentary […]
BVnursery is using LEDS to grow plants…. “he target of the project is to develop an inexpensive, effective method of providing light to plants using only leds. This unit is designed to light standard horticultural starter trays measuing 10 x 20”. The logic follows several paths. Almost zero heat, almost zero waste due to proper […]
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 […]
