[Arao] wanted to measure the RPM of a spinning wheel using parts that he could scavenge from his junk box. A bit of thought led him to build a reflective sensor which can measure the spinning of a ...

Speed-Accel-Meter is a user-friendly application that allows you to measure the speed and acceleration of moving objects. It uses an Arduino board, three infrared (IR) sensors, and a 16x2 LCD screen ...

I needed a tacho/RPM display for a CNC spindle. I decided to use an Arduino Micro and OLED display with a reflective LED/Photo transistor as a sensor. Since powering up, a clock can display the total ...

Abstract: Industrial air-handling units (AHUs) are an integral part of smart buildings that ensure proper heating, air-conditioning, and air ventilation. Measuring the speed of an industrial fan in ...