The IR Speed Measuring Sensor Module uses a groove coupler (a slotted optical sensor) to count rotations and calculate speed. An encoder disc passes through the slot, and the LM393 comparator IC (a chip that compares two voltage levels) outputs a clean digital pulse each time. The ir speed sensor module runs on 3.3V to 5V DC.
The LM393 comparator holds the output signal steady even when light levels shift slightly — most beginners do not expect this. However, the sensor only counts pulses and cannot measure direction of rotation. Connect VCC, GND, and the digital output pin to your Arduino to start reading RPM data right away. StemVolt provide sensor module ready to use.
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Features:
- LM393 comparator IC operates on 3.3V to 5V and keeps output signal stable without extra filtering components
- Digital output type delivers a clear HIGH or LOW pulse that any microcontroller reads with one pin
- GND pin connects directly to power negative, completing the circuit with only three wires total
Technical Specifications:
| Specification | Details |
|---|---|
| Operating Voltage | 3.3V to 5V DC |
| Comparator IC | LM393 |
| Output Type | Digital Output |
| VCC | The positive 3.3-5 v power supply |
| GND | Connect power negative |
Applications:
- A school project motor speed tester uses this to count rotations per minute
- A fan speed monitor reads pulse output and displays RPM on a small screen
- An IR speed measuring sensor module tracks wheel speed on a two-wheel robot accurately
- An ir speed measuring sensor paired with encoder disc measures motor RPM for PID (feedback control) tuning
Package Includes:
- 1 x IR Speed Measuring Sensor Module
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