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.

In recent episodes, she taught her audience how to build squishy circuits with LEDs and a heartbeat-sensor pendant using LilyPad, an Arduino microcontroller board designed for textiles.