Analog Hall Magnetic Sensor
A KY-035 analog Hall magnetic sensor outputs a changing voltage as magnetic field strength changes.
Part images
What it is
A KY-035 analog Hall magnetic sensor outputs a changing voltage as magnetic field strength changes.
How students use it
Students use it for magnet-distance graphs, polarity experiments, wheels with magnets, and analog calibration practice.
Pins and power
Analog signal, VCC, and GND on common KY-035 boards.
Use module power that keeps the analog output inside Pico ADC limits.
Read the signal with ADC and compare values as a magnet moves closer, farther, or flips polarity.
Voltage and safety
Keep analog output at or below 3.3V.
Keep strong magnets away from cards, drives, and medical devices.
Module internals
Main component: Analog Hall-effect sensor.
Hall sensor IC, support components, PCB, and header pins.
Datasheet notes
Analog Hall readings need calibration and are affected by magnet type and placement.
Common libraries
Use machine.ADC for readings.
Common mistakes
Using 5V analog output, reading without calibration, mounting near metal, and confusing it with a digital Hall switch.