Hack a DSLR for DIY Infrared Photography

DSLR sensors have a special filter for IR light; a little hacking is all it takes to strip away that filter and modify the camera for awesome infrared photography.
Jerry, over in the forums for the Home Shop Machinist, shares his crash course in converting an old Pentax DSLR into an infrared unit. He had an old DSLR laying around and decided, upon purchasing a new one, that the old one was destined for hacking greatness. By taking the camera apart, removing the infrared filter, and

Build a “Truth Meter”; A Simple DIY Lie Detector [Electronics]

One element of lie detection, as carried out by lie detecting machines, is the measurement of galvanic skin response–how sweaty the questioned person becomes. This simple electronics project recreates that measure right in your workshop.

DIY Digital Pinball Machine puts Hundreds of Games in One Console

If you’re a pinball fan, a lack of space and money can put a real damper on your dreams of amassing a big collection. This DIY digital pinball machine stores hundreds of games in the footprint of a single pinball