Ky003 Hall Effect/Magnetic Sensor Module – MOD- QC0804

Description

KY003 Hall Effect / Magnet Sensor Module

The KY003 Hall Effect / Magnet Sensor Module is a reliable and easy-to-use magnetic field
detection module that helps electronic systems detect the presence of a nearby magnet. This module is widely
used in DIY electronics, embedded systems, robotics, and automation projects where magnetic detection is required. :contentReference[oaicite:1]{index=1}

The module is typically built around a Hall-effect switch sensor such as the
A3144 or 3144EUA-S, depending on the manufacturer version. When a magnetic
field is detected, the module changes its output state, making it easy for a microcontroller to read whether
a magnet is present or not. Many KY003 modules provide a digital output, making them suitable
for direct connection to GPIO pins without complex signal processing. :contentReference[oaicite:2]{index=2}

This sensor module is commonly used in applications such as door open/close detection,
position sensing, RPM and speed counting, magnetic limit switches,
and automation projects. Its small size, low cost, and simple 3-pin interface make it a popular
choice for beginners as well as advanced makers. :contentReference[oaicite:3]{index=3}

Key Features

• Detects magnetic fields using Hall-effect sensing technology
• Digital output for easy interfacing with microcontrollers
• Compatible with Arduino, ESP32, Raspberry Pi, and similar boards
• Compact 3-pin design for quick installation
• Suitable for motion, position, and magnetic trigger applications

Typical Applications

• Magnet detection projects
• Door and window security sensors
• Motor speed and rotation sensing
• Position and proximity detection
• Industrial and DIY automation systems

Technical Highlights

Most KY003 modules use a 3-pin configuration: VCC, GND, and
Signal. Common versions support operation around 3.3V to 5V or
4.5V to 24V depending on the board design and sensor variant, so checking the exact seller
specification is recommended before use. :contentReference[oaicite:4]{index=4}

If you need a small, efficient, and affordable magnetic sensing solution, the
KY003 Hall Effect / Magnet Sensor Module is an excellent choice for educational, hobby, and
practical electronics applications. :contentReference[oaicite:5]{index=5}