KY-024 Linear Hall Magnetic Sensor
The KY-024 Linear Hall Magnetic Sensor Module is a highly sensitive magnetic field detector designed for use in a wide range of automation and embedded systems. It operates by detecting the presence, absence, and strength of magnetic fields through a linear Hall-effect sensor. Unlike digital magnetic sensors that offer only binary feedback, the KY-024 provides both analog and digital outputs, allowing for more precise control and measurement in real-time applications.
This module is equipped with an LM393 comparator and an A3144 Hall-effect sensor. The analog output delivers a voltage proportional to the magnetic field strength, enabling accurate measurement of magnetic flux density. The digital output, on the other hand, can be triggered when the magnetic field reaches a defined threshold, which is adjustable via the onboard potentiometer.
The KY-024 is compatible with 3.3V and 5V systems, making it ideal for integration with microcontrollers like Arduino, STM32, ESP8266, and Raspberry Pi. It includes power and signal indicator LEDs for easy status monitoring during operation and calibration.
Due to its compact size and reliability, the KY-024 is widely used in proximity detection, position sensing, motor speed control, and contactless switch applications. It’s an excellent component for students, hobbyists, and professionals building advanced magnetic field-sensitive electronic systems.
Key Features
Linear Hall-effect sensor for analog magnetic field detection
Dual output: Analog (AO) and Digital (DO)
Adjustable sensitivity with onboard potentiometer
Wide voltage compatibility: 3.3V – 5V
Built-in power and signal LEDs
Fast response and high sensitivity
Compact and breadboard-friendly design
Product Specifications
| Specification | Details |
|---|---|
| Operating Voltage | 3.3V – 5V |
| Sensor Type | A3144 Linear Hall Sensor |
| Comparator | LM393 |
| Output Type | Analog (AO) and Digital (DO) – |
| Adjustable Sensitivity | Yes, via onboard potentiometer |
| Dimensions | Approx. 32mm x 14mm x 7mm |
| Operating Temperature | -20°C to +70°C |
| Indicator LEDs | Power LED, Digital Output LED |
Pin Configuration
| Pin | Label | Function |
|---|---|---|
| 1 | AO | Analog output (proportional to magnetic field) |
| 2 | GND | Ground |
| 3 | DO | Digital output (active on threshold) |
| 4 | VCC | Power supply (3.3V–5V) |
Applications
Magnetic proximity sensors
Contactless switch systems
Position detection in robotics
Motor speed and rotation sensing
Magnetic field measurement tools
Smart home automation and security systems
