Wrist-Worn Truthiness Detector
Using a galvanic skin response detector, you can now show all of those around you whether or not you’re a big, fat liar.
You can’t buy a pre-made truth detector, but you can watch the video and learn to make your own over at the always-interesting tinker-happy site, Make.com.
Hand to God, once you’ve got all the pieces together it only takes 2 minutes to build, and you can buy it from The Maker’s Shed for $45.

Source: Make
