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Existing Arduino tachometer code that is flowing around the internet give erratic readings even when the IR sensor is properly debounced. They are not useful for speed sensitive devices like a ...

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… ...

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 ...