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 ...

[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 ...

I recently had to build an infrared close proximity sensor that could tell if something was dropped in a parcel delivery drop box. After some searching, I ended up using a microcontroller and a piece ...

This project uses an Arduino microcontroller with an HC-SR04 ultrasonic sensor to measure distances. The Arduino emits ultrasonic pulses and measures the time it takes for the echo to return. This ...

Photoelectric sensors detect objects and surface changes using variations in optical properties. Each sensor includes a light emitter and a receiver, with most relying on infrared light. In optical ...

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 ...