Add an Arduino-based Optical Tachometer to a CNC Router
Build an optical RPM indicator for your CNC router with an Arduino Nano, an IR LED/IR Photodiode sensor and an OLED display for less than $30. I was inspired by eletro18's Measure RPM - Optical Tachometer Instructable and wanted to add a tachometer to my CNC router. I simplified the sensor circuit...By: tmbarbour
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