LM393 IR Speed Sensor Module Digital Output 3.3–5 V

The LM393 IR Speed Sensor Module is a digital optical sensing unit designed for motor speed measurement, pulse counting, and position limit detection. It utilizes a 5 mm slot-type infrared optocoupler and an LM393 comparator to generate a clean digital output signal (0/1) compatible with microcontroller I/O. Operating from 3.3–5 V, the module provides stable waveform output with driving capability above 15 mA. The onboard status LED indicates output state, and the PCB measures 32 × 14 mm with a mounting hole for secure installation. It can interface directly with controllers, relays, limit switches, and alarm modules.

• Slot-Type Infrared Optocoupler | 5 mm detection gap for object interruption sensing

• LM393 Comparator | Clean digital output with stable waveform

• Digital Output Interface | Direct connection to microcontroller I/O (0/1 logic)

• Operating Voltage | 3.3–5 V supply compatibility

• Output Drive Capability | Greater than 15 mA sink current

• Status Indicator LED | Displays output state in real time

• Mounting Hole | Mechanical fixation for panel or chassis installation

• Application Support | Suitable for speed measurement, pulse counting, and limit detection

• Operating Voltage | 3.3–5 V

• Output Type | Digital switch output (0/1 logic)

• Comparator | LM393 wide-voltage comparator

• Output Drive Current | >15 mA sink capability

• PCB Dimensions | 32 × 14 mm

• Mounting | Single fixing hole for mechanical installation

• Sensor Type | Slot-type infrared optocoupler

• Detection Gap Width | 5 mm

• Output Indication | Onboard LED status indicator

• Signal Characteristics | Clean digital waveform from comparator

• Interface | Direct connection to microcontroller digital I/O, relay, or limit switch

• LM393 Datasheet
• IR Speed Sensor Hookup Guide
• 3D model from grabcad.com

• Use LM393 IR Module as Motor Speed Sensor - teachmemicro.com