KY-003 A3144 Hall Effect Magnetic Sensor Module for Arduino

Add contactless magnetic detection to an Arduino or other compatible electronics project with the KY-003 A3144 Hall effect sensor module. It converts a magnetic-field change into a digital output, making it useful for position, speed, proximity and switching experiments.

The compact module is designed for straightforward integration and works well in prototypes where a magnet can trigger a sensor without mechanical contact. Use it to explore magnetic sensing or add a simple detection input to a DIY control circuit.

Simple magnetic detection for DIY circuits

The module uses an A3144 Hall switch IC and an open-collector output stage. The listing identifies the KY-003 module for Arduino boards; check your board's logic and wiring requirements before connecting it. Sensitivity adjustment is not a confirmed feature of every option.

Pack choices vary: select the color/quantity option shown on the product page to match the number of modules you need. The selected option determines what is included.

Choose your pack and add magnetic sensing to your next electronics build.