Hall sensor motor speed measurement module 3144E can be used for motor speed measurement, position detection etc. Magnetic speed count sensor module for Arduino Smart Car. The hall effect sensor reacts to a change in the magnetic field, which makes it possible to count and react to magnetic pulses. Technical data Power supply: 3.3- 5V Digital output (0 or 1) or A0 directly from the sensor LM393 comparator used Module (board) dimensions: 31mm x 14mm x 7mm Weight: 2g https://elecena.pl/product/22622735/hall-sensor-module-on-lm393-hall-sensor-3144e-4pin 2023-02-23 https://elecena.pl/product/22622735/hall-sensor-module-on-lm393-hall-sensor-3144e-4pin 2025-10-28