KY-035 Digital / unipolar Hall Switch 3144 IC Magnetic Sensor Module

KY-035 Digital / unipolar Hall Switch 3144 IC Magnetic Sensor Module

The KY-035 Digital Hall Switch Module with 3144 IC is a compact magnetic sensing module designed for simple on/off detection of magnetic fields. At its core is the unipolar A3144 Hall-effect sensor IC, which outputs a clear digital signal whenever a magnetic pole of sufficient strength is brought near the sensing face. Unlike linear Hall sensors that provide varying analog voltage levels, the 3144 operates as a magnetic switch: its output changes state only when the magnetic flux density crosses its operate and release thresholds, ensuring stable detection with built-in hysteresis. The module is typically powered at 5 V and delivers a clean TTL-compatible signal on its output pin, making it directly usable with microcontrollers such as Arduino, ESP32, and Raspberry Pi. With its straightforward operation and reliable switching characteristics, the KY-035 digital Hall sensor module is widely used in applications like proximity sensing, speed measurement, rotation counting, and contactless switch designs where binary detection of a magnet’s presence is required.

Features

• Built-in A3144 unipolar Hall-effect sensor IC for reliable magnetic field detection.
• Digital output signal (high/low) for direct interfacing with microcontrollers.
• Operates on a wide supply voltage range (4.5V – 24V), commonly used at 5V.
• High sensitivity to magnetic fields with stable switching characteristics.
• Built-in hysteresis prevents output chatter and ensures clean transitions.
• Low power consumption, suitable for continuous sensing applications.
• Compact PCB module with 3-pin header (VCC, GND, OUT) for easy wiring.
• TTL/CMOS compatible output, ready for direct use with Arduino, ESP, Raspberry Pi, and similar boards.
• Suitable for proximity detection, speed measurement, rotation counting, and magnetic switch applications.

Pinout

Specification

Applications

• Rotation and RPM measurement for motors, fans, and wheels.
• Proximity detection for magnetic objects.
• Limit switch replacement in automation systems (contactless switching).
• Position sensing in robotics and mechatronics.
• Door and security systems for detecting magnetic closures.
• Magnetic presence detection in consumer or industrial devices.
• DIY electronics projects for counters, encoders, or digital triggers.
• Contactless buttons and switches in interactive designs.

Package Contents

• 1 x  KY-035 Digital / unipolar Hall Switch 3144 IC Magnetic Sensor Module

Datasheet

• 3144 IC