A
Anonymous
Apr 15, 2026
Rating: 5/5
Reliable Sensor
Been using it for weeks without issues. Great for testing small motors.
Description
Speed measurement sensor module, counter module, motor test module, slot-type optocoupler
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital TTL Level |
| Slot Width | 3mm |
| Max Current | 20mA |
| Interface Type | 3-Pin Header (VCC, GND, OUT) |
| PCB Material | FR-4 Fiberglass |
| Dimensions | 32mm x 14mm x 5mm |
| Weight | 3 grams |
| Compatibility | Arduino, Raspberry Pi, STM32 |
| Package Includes | 1 x Sensor Module, 1 x Dupont Cable |
5 reviews
A
Anonymous
Mar 24, 2026
Rating: 5/5
Accurate Counting
Used this for a motor RPM project and it worked flawlessly. The signal is clean.
A
Anonymous
Mar 03, 2026
Rating: 3/5
Slot Size Issue
Works but the slot is tight for thicker discs. Had to sand down my encoder wheel.
A
Anonymous
Feb 12, 2026
Rating: 4/5
Good Value
Works well but instructions could be better. Had to check the schematic online.
A
Anonymous
Feb 04, 2026
Rating: 5/5
Perfect for Arduino
Plug and play with standard libraries. Very responsive sensor.
5 FAQ
Q: What is the maximum RPM it can detect?
A: It depends on interrupt handling, but typically up to 10,000 RPM.
Q: Does this work with 3.3V logic?
A: Yes, it supports 3.3V to 5V DC input voltage.
Q: Is a pull-up resistor needed?
A: The module usually has a built-in resistor, but check your specific schematic.
Q: Can I use this for water flow metering?
A: Yes, if coupled with a hall effect wheel or slotted disk.
Q: What is the response time?
A: Typically under 10 microseconds for standard optocouplers.
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