Arduino Pulse (Heart beat) sensor with "ECG" display

A re-visit of an old but very popular project. Here we use a cheap pulse sensor hooked up to an OLED display to provide a "heart" trace and heart rate (BPM) in real time, For full write up, circuit diagram, source code etc. see : http://www.xtronical.com/pulseheartse... For other projects and ideas see : Web : http://www.xtronical.com On Patreon at :   / xtronical   Although this has only recently launched, so rewards are not yet determined and I'm not advertising this on my videos yet. Now on twitter at : @tronical_x Quite a new account, will post more when subs grow (if they do!)