How to use Optocoupler sensor module as RPM meter (Tachometer)

Описание к видео How to use Optocoupler sensor module as RPM meter (Tachometer)

In this video, I'll explain how the optocoupler sensor works, how to read the signal, read the holes, and find a fun way to use it as an rpm counter or Tachometer.
So we make a DIY tachometer with arduino.

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Code on the video :
https://miliohm.com/build-tachometer-...

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