Photo Interrupter Sensor Module

Description

A Photo Interrupter Sensor Module uses a U-shaped slotted optical switch to detect the presence or absence of an opaque object. It operates via a contactless, non-mechanical switch mechanism. [1, 2]

How It Works

• The Slot: One side of the slot features an Infrared (IR) LED emitter, and the other side houses a light-sensitive receiver.
• The Detection: When an opaque object passes through or blocks the slot, it interrupts the light beam, causing the module to output a digital signal (HIGH or LOW). [1, 2, 3]

Key Features & Use Cases

• Applications: Widely used for speed/RPM measurement (using an encoder disc), object counting on conveyor belts, and functioning as limit switches for robotic arms or 3D printers.
• Compatibility: Operates perfectly on 3V or 5V and integrates directly with microcontrollers like Arduino, Raspberry Pi, and ESP32.
• Design: Non-contact operation means zero mechanical wear and tear, ensuring high reliability and fast response times