So take a minute , then join us as we look at some ridiculously amazing Arduino creations.

It's easier to make than you think. Julio Terra and of put one together using an Arduino microcontroller, breadboard, 4 LEDs, a few wires, some resistors, and finger contacts made of some silver jewelry stitched to Velcro and soldered to wires.

The typical lie detector we see in movies and TV shows, with the finger glove and wires drawing lines over a rolling page, works by sending a small current through your finger. The needles move based on how much of that current is conducted through your sweaty skin, because everyone constantly sweats even if you don't notice.

This particular homemade lie detector skips the needles and uses the LEDs to tell when you are lying. All you have to do is wire it up correctly and upload the software, courtesy of Julio Terra. The Arduino lie detector, like a "real" one, should be taken with a grain of salt because it is hypersensitive and is more liable to pick up embarrassment, rather than tell the difference between a true statement and a lie.