Linear Hall Sensor Module
A KY-024 linear Hall module senses magnetic field strength and can provide analog and threshold outputs.
Part images
What it is
A KY-024 linear Hall module senses magnetic field strength and can provide analog and threshold outputs.
How students use it
Students use it for magnet position, proximity, polarity experiments, and analog threshold practice.
Pins and power
AO analog output, DO digital output, VCC, and GND on common KY-024 boards.
Use module power that keeps AO/DO outputs Pico-safe.
AO changes with magnetic field; DO changes when the comparator threshold is crossed.
Voltage and safety
Keep analog and digital outputs at Pico-safe levels.
Keep strong magnets away from cards, drives, and medical devices.
Module internals
Main component: Linear Hall-effect sensor with comparator circuitry.
Hall sensor IC, comparator, trimmer, LEDs, resistors, PCB, and header.
Datasheet notes
Magnet orientation, distance, and nearby metal affect readings.
Common libraries
Use machine.ADC for AO and machine.Pin for DO.
Common mistakes
Using the wrong magnet pole/distance, skipping calibration, expecting identical values across modules, and feeding 5V output to Pico.