How to Count Pulse Using Arduino Pulse Counter - YouTube
ESP8266 pulse counting attractively represented on a GC9A01 circular display – thesolaruniverse
Frequency Generator and Frequency Counter for Pro Micro - Hackster.io
How to Count Pulse Using Arduino Pulse Counter - YouTube
GitHub - peninquen/PulseSensor-Arduino-library: Arduino library to control pulse sensor like hall effect flowmeters, and o water counters, electric counters using a photodiode