Product Description

The 4-Pin Linear Magnetic Hall Switch Sensor Module is a compact, reliable, and easy-to-use sensor designed for Arduino, ESP32, STM32, and other microcontrollers.

Using Hall effect technology, this module detects changes in magnetic fields and converts them into a corresponding voltage signal. It can be used for speed measurement, motor position sensing, rotation counting, and proximity detection.

With its linear response and 4-pin interface (VCC, GND, DO, AO), this sensor provides both digital (DO) and analog (AO) outputs, making it versatile for a wide range of DIY electronics and embedded projects.

Key Features

• Hall Effect Linear Sensor – Detects magnetic fields and outputs proportional signals

• Dual Output – Digital output for on/off detection, analog output for linear measurements

• Adjustable Sensitivity – On-board potentiometer for fine-tuning threshold

• 4-Pin Interface – VCC, GND, DO, AO for easy integration

• Wide Supply Range – 3.3V to 5V, compatible with Arduino & ESP boards

• On-board LED Indicator – Visual status for digital output trigger

• Compact PCB Design – Easy to mount in projects

Technical Specifications

• Operating Voltage: 3.3V – 5V DC

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

• Sensor Type: Linear Hall Effect IC

• Adjustable Sensitivity: Yes (via potentiometer)

• Indicator: Power and digital output LED

• Applications: Speed counting, motor RPM measurement, magnetic field detection, proximity sensing

How to Use

1. Connect VCC to 3.3V–5V, GND to ground.

2. AO pin gives an analog voltage proportional to magnetic field strength.

3. DO pin provides a digital HIGH/LOW signal based on threshold set by potentiometer.

4. Use with Arduino’s analogRead() for linear values or digitalRead() for binary detection.

Applications

✔️ Motor speed & RPM measurement
✔️ Magnetic switch detection
✔️ Proximity sensing
✔️ Object counting systems
✔️ Robotics & automation
✔️ DIY Arduino/ESP projects

Package Includes

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