See your heart beat with the Heart Spark pendantHeart Spark is a heart-shaped pendant which flashes LED's in time with your heartbeat.
Heart Spark was created by Sensebridge, a research group interested in building human-machine interfaces based out of San Francisco's Noisebridge.
The Heart Spark works by using a polar chest strap which includes a transmitter that is used to measure your heartbeat and transmit that information wirelessly to the Heart Spark pendant. From there the circuit captures each beat and displays it on a flashing LED. Check out this video from Sensebridge to see the Heart Spark in action.
The Heart Spark is available from Sensebridge for $69. You can pick up a polar chest strap easily at Amazon.com or a local sporting goods store. Simply add a necklace chain and voila! You'll have your very own, completely unique Heart Spark.