ALLNET 4duino Hall TTL Sensor Module - Digital Magnetic Field Detection for Arduino & Raspberry Pi

Detecting magnetic fields in DIY electronics often involves complex circuitry and extra components. The ALLNET 4duino Hall TTL Sensor Module eliminates that hassle by providing a ready-to-use digital Hall effect sensor with clean TTL output, compatible with Arduino, Raspberry Pi, and other microcontrollers. Its onboard LM393 comparator and 3144 Hall switch ensure reliable switching, while integrated hysteresis prevents false triggering. Two indicator LEDs offer immediate visual feedback for power and detection status.

Who is it for

This sensor is ideal for hobbyists, educators, and engineers working on automation, robotics, or position sensing projects. It excels in non-contact switching applications where mechanical wear is a concern, such as door sensors, RPM measurement, or proximity detection.

Main features

• Digital TTL output for direct connection to microcontroller GPIO pins
• Wide operating voltage range: 3.3V to 5V DC, compatible with common development boards
• Onboard LM393 comparator and 3144 Hall switch for reliable magnetic field detection
• Two indicator LEDs: power and detection status
• Integrated hysteresis for stable switching without false triggering
• Compact module with mounting holes for easy installation

Specifications

• Sensor type: Hall effect sensor
• Output type: Digital TTL (LOW when magnetic field detected)
• Operating voltage: 3.3V - 5V DC
• Current consumption: < 10mA
• Operating temperature: -20°C to +85°C
• Number of pins: 3 (VCC, GND, DOUT)
• Dimensions: Compact module with mounting holes

Tips

Place the sensor close to the magnet for reliable detection. Use the onboard LEDs to quickly verify power and detection status during prototyping.