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 ...

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 ...

Posted in Tool Hacks Tagged arduino, emitter detector pair, infrared, measurement, op-amp, rpm, square wave, tachometer, tool ← Robotic Laser Keeps Cat Entertained While You Hack ...