Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital Switching Output |
| Sensor Type | Slot-Type Optocoupler |
| Working Current | Approx. 15mA |
| Interface Type | 3-Pin PH2.0 Connector |
| PCB Dimensions | 35mm x 15mm x 5mm |
| Mounting Hole Diameter | 3mm |
| Operating Temperature | -20°C to 85°C |
| Response Time | < 10 microseconds |
| Package Weight | 5 grams |
Anonymous
Apr 15, 2026
Rating: 5/5
Accurate counting
No missed pulses during testing. I compared it against a commercial tachometer and the readings were identical.
Anonymous
Apr 05, 2026
Rating: 3/5
Needs pull-up resistor
Functionality is okay but my microcontroller needed an external pull-up resistor to stabilize the output line.
Anonymous
Mar 25, 2026
Rating: 4/5
Good sensor, tight slot
Works well for testing motors. The slot is a bit narrow so you need a thin disc, but otherwise performance is solid.
Anonymous
Feb 04, 2026
Rating: 5/5
Great value
Cheap and effective for hobbyists. Shipping was fast and the module arrived well protected in anti-static packaging.
Anonymous
Jan 26, 2026
Rating: 5/5
Perfect for RPM projects
Used this with an Arduino to measure fan speed. The signal is clean and consistent. Easy to integrate into my existing setup.
Q: Does this work with 3.3V logic levels?
A: Yes, the module is compatible with both 3.3V and 5V logic systems commonly found in microcontrollers.
Q: Is the connection cable included in the box?
A: No, the module comes with header pins. You will need to solder wires or use a compatible jumper cable separately.
Q: Can it detect metal objects passing through?
A: No, this is an optical sensor. It detects objects that block the light path, typically requiring a non-transparent disc or flag.
Q: What is the maximum RPM this can measure?
A: It depends on the interrupt handling of your controller, but the sensor itself supports high-frequency switching suitable for most DC motors.
Q: Is there a specific library required for Arduino?
A: No specific library is needed. You can use standard digital input interrupts to count the pulses generated by the module.
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