Description
The KY-003 Hall Effect Sensor Module detects magnetic fields and converts them into a digital signal.
Ideal for position sensing, and motion detection, this module is perfect for use with Arduino, Raspberry Pi, and other microcontrollers.
It triggers when a magnetic field is near – enabling contactless sensing with excellent durability and reliability.
The KY-003 is a magnetic hall effect switch, if no magnetic field is present, the signal line of the sensor is HIGH.
If a magnetic field is presented to the sensor, the signal line goes LOW, at the same time the LED on the sensor lights up.
The polarity of the magnetic field is of influence to the switching action, the front side of the sensor needs the opposite polarity as the back of the sensor to switch on.
Model: KY-003
- Sensor Type: A3144 Hall Effect Sensor
- Digital Output: High/Low (0 or 1)
- Voltage Range: 3.3V – 5V (Arduino & Pi compatible)
- Detects magnetic fields from common neodymium or ceramic magnets
- Built-in Status LED – lights up when magnetic field is detected
- 3-Pin Interface: VCC, GND, Digital Output (DO)
- Power consumption : 3 mA at rest, 8 mA when switched on
- Magnetic, speed, gap induction
What’s Included:
- 1x KY-003 Hall Effect Sensor Module
Ideal Applications:
- Magnetic Proximity Sensors
- Speed & Position Sensing (e.g., wheel encoders)
- Robotics Projects
- Contactless Switches & Security Systems
- Educational Electronics & STEM Learning
Quick Tips:
- Outputs LOW when magnetic field is present.
- Use with Arduino: digitalRead(pin) to check sensor state.
- Great for detecting magnets on wheels, doors, or rotating parts.
