NTE30116 Tinted Blue 5mm Infrared LED Emitter (940nm) SM0038 Photo Module for PCM Remote Control System (38kHz) The principle of this setup is somewhat simple and self-explanatory. In this circuit, ...

The main purpose of this article is to explain how to build a simple spark plug wire sensor from scratch. I don’t have the resources nor the expertise to get into how to build a luxurious mower ...

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 ...

Works with Arduino (5V) and Raspberry Pi (3.3V) TTL.” The IR Detector proximity sensor is not just limited to the applications mentioned above.

A tachometer used to be an accessory added to the dash of only the sportiest of cars, but now they’re pretty much standard equipment on everything from sleek coupes to the family truckster. I… ...