Photoelectric Beam Speed Sensor Module | 3.3V–5V Slot-Type Optocoupler RPM Counter for Arduino, AVR, PIC & Robotics DIY Kits

Product Description

The Photoelectric Beam Speed Sensor Module (Slot-Type Optocoupler) is a high-precision infrared detection module used for speed measurement, counting, and motion sensing in robotics and automation projects.

It features a U-shaped slot-type IR emitter and receiver pair, which detects objects passing through the slot by interrupting the infrared beam. When an object passes through, the module generates a digital pulse output that can be counted to measure rotational speed (RPM) or linear movement.

Compatible with Arduino, AVR, PIC, ESP32, and other microcontrollers, this module is ideal for building tachometers, encoder wheels, and motor control systems.

Key Features

• Sensor Type: Slot-type infrared photoelectric sensor (optocoupler)

• Operating Voltage: 3.3V – 5V DC (Arduino-compatible)

• Output Type: Digital (High/Low pulse output)

• Slot Width: Approx. 10mm

• Output Signal: TTL compatible digital pulse

• Response Time: < 1ms (high-speed detection)

• Indicator LEDs: Power and signal status indicators

• Mounting: Two screw holes for easy installation

• Interface Pins: VCC, GND, OUT

• Material: High-quality PCB with integrated IR emitter and receiver

• Compatibility: Arduino, STM32, AVR, PIC, ESP8266, and other microcontrollers

Advantages

• High-speed response and accurate counting performance.

• Simple 3-pin interface for quick integration.

• Adjustable threshold via onboard potentiometer (if equipped).

• Compact, lightweight, and durable design.

• Works perfectly for motor speed measurement, encoder disks, and line interruption detection.

Applications

• Motor RPM and speed measurement

• Encoder wheel and pulse counting

• Robotics movement detection

• Conveyor belt monitoring systems

• DIY automation and electronics projects

• Educational kits and lab experiments