LM393 IR Speed Sensor Module – Digital Output

Description

Description

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 3.35 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.

Features

• 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 | 3.35 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

Specifications

• Operating Voltage | 3.35 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

Links

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

Tutorials

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