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How LEDS work? Check more at

How LED's Work? An LED is a special type of diode that is specifically optimized to give off light, usually in the visual or infrared spectrum, as electricity is passed through it.

DIY Infrared transmitter for iPhone, iPod

Make a customer LED infrared for your iPhone! Using this to control the shutter on my Canon

Simple DIY perimeter alarm with tripwire (for outdoors) Walmart has a package of multiples like these

Survival Forums SHTF Preparedness - Dollar Store perimeter alarm - read the other comments, there are some great, cheap ways to set up an alarm without having to rely on something electronic.

Pummel Pipe Melee Weapon - DIY

Pummel Pipe - Homemade Anti-Zombie Weapon build into a walking cane. Will police consider it a weapon?