Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Sensor IC | A3144 Hall Effect |
| Working Voltage | 3.3V to 5V DC |
| Output Signal | Digital TTL Level |
| Detection Range | 0-5mm (approx) |
| LED Indicator | Power and Trigger Status |
| Interface Type | 3-Pin PH2.0 Connector |
| PCB Dimensions | 35mm x 15mm |
| Microcontroller Support | Arduino, ESP32, STM32 |
| Primary Use | RPM Measurement, Counting |
| Weight | 5 grams |
Anonymous
Mar 25, 2026
Rating: 5/5
Fast Delivery
Arrived quickly and packaged well. Tested immediately with a magnet and the LED responded instantly. Good value for money.
Anonymous
Mar 22, 2026
Rating: 5/5
Accurate Counting
Used this for a conveyor belt counter project. Very reliable digital signal without much bounce. Highly recommend for automation.
Anonymous
Mar 02, 2026
Rating: 3/5
Sensitivity varies
Works but had to adjust magnet distance carefully. Close range only. Make sure your magnet is strong enough for consistent triggers.
Anonymous
Jan 26, 2026
Rating: 5/5
Perfect for Arduino Tachometer
Works flawlessly with my Arduino Uno. Used it to measure fan speed and the digital output is very clean. Easy to wire up.
Anonymous
Jan 18, 2026
Rating: 4/5
Good sensor, mind the voltage
Solid build quality. Just ensure you supply 5V for best stability although it says 3.3V works. Great for counting revolutions.
Q: Does this work with 3.3V logic systems?
A: Yes, it operates between 3.3V and 5V DC, making it compatible with most 3.3V microcontrollers.
Q: What connector type is used on the board?
A: It features a standard 3-pin PH2.0 header for VCC, GND, and Signal Output.
Q: Is there a potentiometer for sensitivity adjustment?
A: No, this is a digital switch module based on the A3144 IC and does not have an adjustable potentiometer.
Q: Which magnetic pole triggers the sensor?
A: Typically the South pole faces the marked side of the A3144 IC to trigger the output low.
Q: Can it handle high RPM measurements?
A: Yes, the A3144 has a fast response time suitable for most motor RPM and speed counting applications.
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