4-Pin Linear Magnetic Hall Switch Sensor Module | Adjustable Hall Effect Speed Counter & Magnetic Detector for Arduino, ESP32 & Robotics

Product Description

The 4-Pin Linear Magnetic Hall Switch Sensor Module is a compact, high-precision device that detects magnetic fields and converts them into voltage signals using Hall effect technology. Designed for Arduino, ESP32, STM32, and similar microcontrollers, it’s perfect for speed measurement, rotation counting, position sensing, and proximity detection.

The module offers both analog (AO) and digital (DO) outputs, allowing it to function as either a linear magnetic field sensor or a magnetic switch. An on-board potentiometer enables easy sensitivity adjustment, while built-in indicator LEDs provide clear visual feedback.

Reliable, responsive, and easy to integrate, this Hall sensor module is ideal for DIY electronics, robotics, and automation projects.

Key Features

• Hall Effect Linear Sensor: Detects magnetic fields and outputs proportional voltage signals.

• Dual Output:

  • Analog (AO) – Linear magnetic field strength signal.

  • Digital (DO) – High/Low signal for magnetic switch detection.

• Adjustable Sensitivity: Fine-tune detection threshold using the onboard potentiometer.

• 4-Pin Interface: VCC, GND, DO, AO – simple and plug-and-play with Arduino or ESP32.

• Wide Supply Voltage: Operates from 3.3V to 5V DC.

• Indicator LEDs: Power and digital output status LEDs for easy debugging.

• Compact PCB Design: Lightweight and easy to mount on project boards.

Technical Specifications

• Operating Voltage: 3.3V – 5V DC

• Sensor Type: Linear Hall Effect IC

• Output Pins: AO (Analog), DO (Digital), VCC, GND

• Sensitivity Adjustment: Yes (via potentiometer)

• Indicators: Power LED & Digital Output LED

• Operating Temperature: −20°C to +80°C

• Module Size: Compact design for embedded projects

Applications

• Motor speed and RPM measurement

• Magnetic switch detection

• Proximity sensing and position feedback

• Object counting and automation systems

• Robotics and motion control projects

• DIY Arduino and ESP32 educational kits

How to Use

1. Connect: VCC → 3.3V–5V, GND → Ground.

2. Analog Output (AO): Provides a variable voltage proportional to magnetic field strength.

3. Digital Output (DO): Sends HIGH/LOW signal based on the set threshold.

4. Read Values:

   • Use analogRead() for linear magnetic intensity.

   • Use digitalRead() for on/off magnetic detection.

Package Includes

• 1 × 4-Pin Linear Magnetic Hall Switch Speed Counting Sensor Module