3144E Hall Effect Sensor Module – Digital Magnetic Switch & Speed Counting Board for Arduino & DIY Electronics
Short Key Features (Bullet Points)
Precise Magnetic Detection: Built around the reliable 3144E Hall Effect IC to detect permanent magnets and magnetic fields without physical contact.
Clean Digital Switch Output: Provides instant high/low digital switching signals for easy microcontroller and comparator integration.
Onboard Status LED: Features an integrated indicator LED that lights up instantly when a magnetic field is detected.
Adjustable Comparator Circuit: Includes built-in comparator circuitry for stable signal processing and noise rejection.
Wide Microcontroller Compatibility: Operates on 3.3V to 5V DC, making it plug-and-play compatible with Arduino, ESP32, Raspberry Pi, and STM32 boards.
Product Overview & Description
The 3144E Hall Sensor Module is a compact, high-sensitivity magnetic field sensor designed for speed measurement, position tracking, proximity sensing, and contactless switching projects. At its core is an on-chip Hall effect sensor combined with a Schmitt trigger and differential amplifier, ensuring sharp, reliable digital switching without bounce or noise.
Whether you are building an RPM tachometer for a rotating motor wheel, creating a security door/window alarm, or prototyping smart robotics, this module provides clean digital feedback. Its lightweight board layout, standard mounting hole, and low power consumption make it an essential tool for makers and engineers alike. Technical Specifications
Feature / Parameter | Specification |
Sensor IC | 3144E / A3144 Unipolar Hall-Effect Switch |
Operating Voltage | 3.3V to 5V DC |
Output Type | Digital Output (High/Low) |
Comparator Drive Capability | Up to 16mA |
Operating Temperature | -40°C to +85°C |
Board Dimensions | 32 mm × 14 mm |
Mounting Hole Size | 3 mm Diameter |
Interface Pins | 4-Pin / 3-Pin standard layout (VCC, GND, DO, AO options) |
Pinout & Connection Guide
Pin Label | Description | Microcontroller Connection |
VCC | Positive Power Supply | Connect to 3.3V or 5V power rail |
GND | Ground Reference | Connect to System Ground (GND) |
DO (Digital Out) | Digital Switching Signal | Connect to any Digital Input Pin on Arduino/Microcontroller |
AO (Analog Out) | Optional Analog Voltage | (Available on select layouts for raw signal monitoring) |
Key Applications
RPM & Speed Measurement: Tachometers, wheel rotation counting, and motor speed monitoring.
Proximity & Position Sensing: Contactless limit switches, magnetic encoders, and security lid/door sensors.
Smart Home & Robotics: Obstacle detection, smart lock sensors, and automated conveyor tracking.
Quick Usage & Testing Tip
🧲 Testing Tip: Bring the North or South pole of a permanent magnet close to the face of the 3144E sensor. When the magnetic field threshold is reached, the onboard LED will light up and the digital output (DO) pin will pull LOW.
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