KY-035 Digital / unipolar Hall Switch 3144 IC Magnetic Sensor Module
The KY-035 Hall Sensor Module with 3144 IC provides a digital high/low output for reliable magnetic field detection in proximity and rotation sensing.
30.00 EGP
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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
| Attribute | Details |
| Module Name | KY-035 Digital Hall Magnetic Sensor |
| Sensor IC | A3144 Unipolar Hall-effect Switch |
| Operating Voltage | 4.5V – 24V DC (commonly 5V) |
| Supply Current | 4 mA |
| Output Type | Digital (High/Low, TTL compatible) |
| Output Current | Up to 25 mA (sink capability) |
| Quiescent Output | HIGH (no magnetic field detected) |
| Triggered Output | LOW (magnetic field present) |
| Operate Point (Bop) | 35 Gauss |
| Release Point (Brp) | 25 Gauss (with hysteresis) |
| Polarity Sensitivity | Unipolar – responds to one magnetic pole |
| Response Time | <10 µs (fast switching) |
| Interface Pins | 3-pin header: VCC, GND, OUT |
| Module Dimensions(L x W) | 35 mm X 25 mm |
| Operating Temperature | −40°C to +85°C |
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
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