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KY-024 Linear Magnetic Hall Sensor Module — Analog + Digital Output, Arduino Speed & Position
KY-024 Linear Magnetic Hall Sensor Module Analog + Digital Output, Arduino Speed & Position
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KY-024 Linear Magnetic Hall Effect Sensor Module — Analog + Digital Output
The KY-024 is a linear Hall effect sensor module that detects magnetic field strength and outputs both an analog voltage (proportional to field intensity) and a digital signal (threshold-triggered via onboard comparator). An adjustable potentiometer sets the digital trigger sensitivity — ideal for Arduino speed detection, position sensing, and proximity switching.
Key Specifications
| Parameter | Value |
|---|---|
| Sensor IC | Linear Hall Effect IC (A3144 compatible) |
| Supply Voltage | 3.3V – 5V DC |
| Analog Output | 0V – VCC (proportional to field strength) |
| Digital Output | HIGH / LOW (adjustable threshold) |
| Sensitivity Adjustment | Onboard potentiometer |
| Indicator LEDs | Power LED + Digital output LED |
| Connector | 4-pin (VCC, GND, DO, AO) |
| PCB Size | ~15 × 36mm |
Why Choose KY-024?
- Dual Output — Analog output for field strength measurement + digital output for threshold detection
- Adjustable Sensitivity — Potentiometer tunes digital trigger point for different magnet strengths
- Visual Feedback — Onboard LED lights when digital threshold is exceeded
- 3.3V & 5V Compatible — Works with Arduino, ESP32, STM32, Raspberry Pi
- Linear Response — Analog output varies linearly with magnetic flux density
Typical Applications
- Wheel speed detection (bicycle speedometer, motor RPM counter)
- Magnetic position sensing (end-stop detection, rotary encoder)
- Proximity switch for magnetic targets
- Current sensing via magnetic field of a conductor
- Contactless door/window open-close detection
- Brushless motor commutation sensing
Arduino Wiring
VCC → 5V, GND → GND, DO → digital pin (interrupt-capable for speed counting), AO → analog pin.
For RPM: attach magnet to rotating shaft, count DO pulses per second with attachInterrupt().
FAQ
Q: What magnet type works best with KY-024?
A: Any permanent magnet (neodymium N35+ recommended). Bring the magnet face within 5–10mm of the sensor IC for reliable triggering.
Q: Can KY-024 detect both North and South poles?
A: Yes — the linear Hall IC responds to both polarities. North pole increases analog output above midpoint; South pole decreases it below midpoint.
Package Contents
- 1× KY-024 Linear Hall Effect Sensor Module
