This Arduino based little digital tachometer was originally created for counting the speed of turntables and fidget spinners. There is another application to consider – a rear wheel tachometer for ...

This tutorial will guide you through the process of building a tachometer around an Arduino. Tachometers are used to measure rotation rate in Revolutions Per Minute (RPM). You don’t need much in ...

Just make sure you modify the code for the correct number of cylinders in your vehicle. Simple, cheap, effective – even if it is more of a shift point indicator than true tachometer, it gets the ...