IR Speed Measuring Sensor Module with Groove Coupler | LM393 Based

The IR Speed Measuring Sensor Module with Groove Coupler is a transmissive infrared slot sensor built around the LM393 comparator IC, operating from 3.3V to 5V DC and outputting a digital pulse each time an opaque object — such as an encoder disk slot or fan blade — passes through the 15mm groove coupler opening. The ir speed sensor module lm393 transmissive design differs fundamentally from reflective IR sensors — instead of detecting surface reflection, it detects interruption of a continuous IR beam crossing the groove gap, giving a clean, noise-immune digital output that is unaffected by ambient light changes and surface colour variations.

the lm393 ir sensor datasheet, the LM393 dual comparator IC converts the phototransistor output to a clean digital signal with a well-defined HIGH-to-LOW transition for each beam break, making it ideal for pulse counting on Arduino. The lm393 ir sensor arduino connection uses three wires — VCC, GND, and OUT to a digital input pin — and the ir speed measuring sensor pulse count per revolution is determined by the number of slots on the encoder disk, enabling RPM calculation using Arduino’s pulseIn() or interrupt-based counting. The ir groove coupler sensor 15mm slot accommodates standard encoder discs and fan blade thicknesses used in Indian robotics and motor projects.

the groove coupler requires the encoder disk or blade to physically pass through the 15mm slot — the sensor cannot be added to a motor shaft without an appropriately sized encoder disk fitted to the shaft, adding a mechanical design step to the build. StemVolt provide the module is suited for electronics learners building motor speed measurement systems and practical embedded RPM counting electronics projects.

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Features:

• LM393 comparator gives clean digital pulse on each slot pass
• Transmissive beam-break unaffected by ambient light and surface colour
• 15mm groove coupler fits standard encoder disc and fan blade sizes
• 3V to 5V supply with digital output compatible with all Arduino boards
• 30mm x 15mm compact PCB for robot chassis and motor mount builds

Technical Specifications:

 Applications:

• IR Speed Sensor Module used for Arduino motor RPM counting build
• College project uses ir speed sensor module lm393 for encoder demo
• Line follower uses lm393 ir sensor arduino for wheel velocity control
• Robot odometry uses ir speed measuring sensor for distance calculation
• Fan monitor uses ir groove coupler sensor for blade speed detection

Package Includes:

• 1 x IR Speed Measuring Sensor Module