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.

Undertanding Wall Wart Power Supplies [Electronics]

Wall Warts, You likely use them everyday without giving them much of a second thought. What exactly goes on inside those chunky black wall chargers that turns AC current into a nice DC trickle for your favorite electronics? Read on to learn more.