Hall Effect Sensor A3144

Overview

Unlock precise magnetic sensing with the Hall Effect Sensor A3144, a robust and reliable digital switch designed for a wide range of applications. This sensor detects the presence of a magnetic field and outputs a digital signal, making it perfect for position sensing, speed detection, and proximity switches. Whether you're a hobbyist building a tachometer or an engineer developing industrial automation, the A3144 offers a simple, cost-effective solution with high sensitivity and stable performance.

Key Features

• Digital Output: Provides a clean on/off signal, compatible with most microcontrollers (3.3V-5V).
• High Sensitivity: Detects magnetic fields with a typical operating point of 50 Gauss, allowing for reliable detection with small magnets.
• Latching Behavior: The output latches when a south pole is detected and resets with a north pole, ideal for rotary encoders and position sensing.
• Wide Voltage Range: Operates from 4.5V to 24V, making it versatile for various projects.
• Open-Collector Output: Can drive loads directly (up to 25mA) or interface with logic circuits.
• Compact and Durable: Small TO-92 package, easy to integrate into PCBs or breadboards.

Technical Specifications

• Operating Voltage: 4.5V - 24V DC
• Output Type: Digital, open-collector (requires pull-up resistor)
• Output Current: 25mA (max)
• Operating Point: 50 Gauss (typ)
• Release Point: 50 Gauss (typ)
• Hysteresis: 50 Gauss (typ)
• Operating Temperature: -40°C to +85°C
• Package: TO-92 (3-lead)
• Weight: 1g

Applications & Use Cases

• RPM Measurement: Count rotations in motors, wheels, or gears by attaching a magnet to the rotating part.
• Position Sensing: Detect the position of moving parts in 3D printers, CNC machines, or robotics.
• Proximity Switches: Implement non-contact switches for doors, lids, or safety interlocks.
• Brushless Motor Control: Provide rotor position feedback for commutation.
• Flow Meters: Measure fluid flow by detecting the rotation of a magnetic impeller.
• Security Systems: Create magnetic reed switches for alarms.

What's Included

• 1x Hall Effect Sensor A3144 (TO-92 package)
• (Note: Pull-up resistor not included, but recommended for proper operation)

Compatibility

• Works with Arduino, Raspberry Pi, ESP32, STM32, and any microcontroller with digital input pins.
• Compatible with 3.3V and 5V logic levels.
• Can be used with any magnet (e.g., neodymium, ferrite).

MOKWN Recommendation

For most projects, we recommend using a pull-up resistor (e.g., 10kΩ) between the output pin and VCC to ensure a stable high signal when no magnet is present. For a quick test, you can use the A3144 with an LED and a resistor in series. This sensor is a must-have for any maker's toolkit, offering reliable performance at an affordable price. Buy now and enhance your projects with precise magnetic sensing!