Posted in Arduino Hacks Tagged arduino, heartbeat, infrared, led, medical, photodiode, photoplethysmography, pulse ← Massive Tesla Coil Plays Music In The Snow Hackaday Links: January 11, 2015 → ...

If you want to attach a light, motor or sensor to the Arduino board, you just snap it on -- you can spend more of your time coding rather than dealing with wiring and other hardware hassles.