In the spirit of using what I have around I really wanted a scream box this year but couldn't handle price of some so I made my own with a arduino, arduino prototype shield, Micro SD card reader, PIR sensor, 1/4th inch audio jack, small guitar amp, a few wires, a switch and a few days of...

Not sure if this is of any value but Electronic Goldmine has a bunch of surplus Arduino micro controllers that appear pretty cheap.

For the last two years I have been designing and building a micro haunt for a family and friends 5K at work (we usualy have about 5 volentiers) So here is this years, the theme was "the mad lab"

My budget is about 200$. I don't think a small (6 inch or less) fog machine can be bought for less than one grand, so I am making my own. I need the fog machine to be battery operated, and hopefully small enough to fit inside a shirt/trench coat. If worst comes to worst, it can fit inside of a...