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

By Jason Fitzpatrick on April 22nd, 2011

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.

At Make Magazine they’ve shared a guide to building your own galvanic skin response tester. It’s not a full lie detector (nor are lie detectors even as accurate as Hollywood would have us believe); none the less it’s a fun little project and a great way to learn about physiology and electronics at the same time. Watch the video above to see how they build and test it, then hit up the link below for detailed instructions.

The Truth Meter [Make Projects]

Jason Fitzpatrick is a warranty-voiding DIYer who spends his days cracking opening cases and wrestling with code so you don't have to. If it can be modded, optimized, repurposed, or torn apart for fun he's interested (and probably already at the workbench taking it apart). You can follow him on if you'd like.

  • Published 04/22/11
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