Description The M5Stack Hall Effect Unit (A3144E Hall Sensor) is a compact Hall sensor module for detecting magnetic fields, proximity, position, and speed-related events. It integrates three A3144E Hall effect switches, with logic processing handled by a 74HC08D gate IC. The M5Stack Hall Effect Unit (A3144E Hall Sensor) outputs a low-level signal when an S magnetic pole approaches the front side of the sensor or an N magnetic pole approaches the back side. The onboard red LED lights when the magnetic state is detected, making the unit useful for door magnetic alarms, magnetic proximity sensing, rotation detection, and other embedded projects. Features Unipolar Hall switch sensing Three integrated A3144E Hall effect switches 74HC08D logic processing circuit Fast response speed and high sensitivity Low-level active digital output Red LED status indicator HY2.0-4P Grove interface Building block compatible mounting design Specifications Hall Sensor A3144E x 3 Logic IC 74HC08D Status Indicator Red LED Output Level Low-level active Signal Interface Digital output Product Size 32.0 x 24.0 x 8.0mm Product Weight 4.2g Package Size 138.0 x 93.0 x 9.0mm Gross Weight 10.0g Applications Door magnetic alarm systems Magnetic field proximity sensing Speed and rotation measurement Position detection in embedded devices Magnet-triggered interaction projects Product List 1 x Unit Hall 1 x HY2.0-4P Grove connection cable (20cm) 1 x Magnet Other Content PinMap HY2.0-4P Wire Function Black GND Red 5V Yellow NC White Digital Output Resources Product documentation A3144E datasheet Arduino example UiFlow2 documentation EasyLoader example FAQ How does this Hall sensor unit trigger output? It outputs a low-level signal when an S pole approaches the front side or an N pole approaches the back side of the sensor. What can it be used for? It is suitable for door magnetic alarms, magnetic proximity sensing, speed measurement, rotation detection, and position feedback projects. Does the module include a status indicator? Yes. The onboard red LED lights when the magnetic state is detected.
