Generic LM393 Linear Hall Effect Sensor Module - Analog/Digital Output

The module operates from 2.3V to 5.3V DC. This wide range makes it directly compatible with both 3.3V systems (like ESP32, Raspberry Pi) and 5V systems (like most Arduino boards) without requiring a logic level shifter.

The AOUT pin provides a raw analog voltage proportional to magnetic field strength, which can be read by an MCU's ADC pin for precise measurements. The DOUT pin provides a digital high/low signal via the onboard LM393 comparator, which triggers when the field exceeds a threshold set by the potentiometer. Both outputs can be used simultaneously.

Yes. The module includes a blue potentiometer. Rotating it adjusts the reference voltage for the LM393 comparator, changing the magnetic field strength required to trigger the digital output from low to high. This allows you to fine-tune the sensor's sensitivity for different applications.

A linear Hall sensor (like the 3144) outputs a voltage proportional to the magnetic field's strength and polarity, allowing for precise measurement. A switch-type (digital) Hall sensor only provides an on/off signal at a fixed threshold. This module combines both functionalities by offering the raw linear signal and a conditioned digital output.

Common applications include motor speed (RPM) measurement by counting pulses from a rotating magnet, non-contact position sensing for robotic joints, proximity detection for limit switches, and linear displacement measurement. The dual outputs make it versatile for both precise analog feedback and simple digital triggering.