for more information on building your very own heartbeat visualiser using an Arduino Nano microcontroller and heart rate sensor jump over to the official Instructables project page.

He’s built a finger-mounted pulse detector using a few simple components and an Arduino. This circuit uses a method known as photoplethysmography.

An ultra-stretchy sticky-backed sensor has come out of research at the University of British Columbia. Made from a rubber infused with graphene nano-flakes, it has been tested with elongation up to ...