Tachometer RPM Speed Measuring Optocoupler Module

The Tachometer RPM Speed Measuring Optocoupler Module is a high-precision rotational speed sensor designed for contactless measurement of shafts, motors, and wheels.
Using an infrared (IR) emitter and phototransistor pair, it outputs clean digital pulses every time a reflective mark or slot interrupts the beam, enabling microcontrollers to calculate revolutions per minute (RPM) with exceptional accuracy.

This module is fully compatible with Arduino, Raspberry Pi, ESP32, and other development boards for robotics, motor control, and industrial monitoring.

🔹 Key Features

• Non-Contact Measurement – Infrared optocoupler detects rotational speed without mechanical wear.

• High Accuracy – Clean digital output for precise RPM calculations.

• Wide Voltage Range – Works with standard 3.3 V and 5 V logic.

• Onboard Signal Conditioning – Noise-resistant comparator ensures stable readings.

• Compact PCB – Easy integration in embedded or portable devices.

🔹 Technical Specifications

• Operating Voltage: 3.3 V – 5 V DC

• Sensor Type: Infrared transmitter & phototransistor (optocoupler)

• Output Signal: Digital pulse (TTL level)

• Detection Distance: ~0.5 – 2 cm adjustable

• Response Time: <2 μs for high-speed rotation

• Dimensions: Approx. 32 mm × 14 mm × 8 mm

• Operating Temperature: –20 °C to +70 °C

🔹 Applications & Use Cases

• Motor RPM Monitoring – DC, stepper, or brushless motors.

• Industrial Automation – Conveyor belt speed control and feedback systems.

• Robotics & Drones – Propeller or wheel speed measurement.

• Automotive Projects – DIY tachometers and speed gauges.

• Educational Labs – Physics experiments and motion analysis.

🔹 Advantages for Makers & Engineers

• Pairs seamlessly with Arduino and Accessories for quick prototyping.

• Integrates with Electronics Components for advanced motor-control setups.

• Supports open-source RPM libraries and example sketches.

🔹 Safety & Precautions

• Avoid direct sunlight or strong ambient IR light for accurate readings.

• Ensure reflective tape or slots are properly aligned with the sensor.

• Provide a stable, regulated power supply to reduce electrical noise.

🔗 Helpful Internal Links

• Browse Tools and Accessories for mounting hardware and jumper wires.

• Explore more Electronics Components for complete motor control systems.

🎥 Video Tutorial

[YouTube tutorial link here]

📝 Product Summary

The Tachometer RPM Speed Measuring Optocoupler Module offers non-contact, high-precision rotational speed sensing for Arduino, Raspberry Pi, robotics, and industrial automation, ensuring reliable RPM data in a compact, easy-to-use design.