He wanted to do a little more with the equipment so he ditched the watch and built an Arduino-based heart rate monitor. He’s still using the chest strap and was happy to find that SparkFun sells ...

The punchline is that the four-to-five dollar chip does everything for you, including analog filtering, wander removal, and even detecting the pulse rate ... The Arduino in the examples is ...

We’ve also broken down some key specs to consider before you get your heart set on one monitor in particular. Need a way to smash tennis balls across the court? Try your forehand. Need somewhere to ...