In this episode of the Make: Talk podcast I interviewed Joel Murphy. He's an artist living in Brooklyn and owns a business designing and fabricating electro-mechanical projects for artists and designers. He teaches Physical Computing at Parsons the New School for Design, and he owns Rachel’s Electronics, an online store for electronics kits and breakout boards. He's the co-creator of the Pulse Sensor, an Arduino compatible sensor that measures heart rate beats per minute. (Here's a how-to article about making a headband with the Pulse Sensor in MAKE, Volume 29).