2240093021 Fe18C6D5A1
Seqbeat T
Ladayada reviewed the BlinkM we featured here on MAKE, she made a LED that blinks like a heartbeat and a temperature sensor that changes color of the LED to blue (cold) or red (hot) – Link.

Related:
Tm Blinkm Closeup Obliq Sma
BlinkM, the smart LED – Link.