KY-003 Hall Effect Magnetic Sensor Module – A3144 for Arduino

KY-003 Hall Effect Magnetic Sensor Module – A3144 Digital Sensor for Arduino

Buy the KY-003 Hall Effect Magnetic Sensor Module online in Pakistan from Robostan.pk. This compact digital magnetic field detection module is designed for Arduino, robotics, automation, magnetic proximity sensing, speed detection, and DIY electronics projects.

Featuring the A3144 Hall Effect Sensor IC, the KY-003 detects the presence of a suitable magnetic field and provides a digital output signal that can be read by a compatible microcontroller.

The module features a convenient 3-pin interface, digital output, and onboard indicator LED on common versions, making it useful for magnetic switches, contactless position detection, rotation counting, and electronic control systems.

Key Features

• KY-003 digital Hall Effect magnetic sensor module
• Based on the A3144 Hall Effect switch IC
• Contactless magnetic field detection
• Digital HIGH and LOW output signals
• Active-low magnetic detection output
• Unipolar magnetic sensing technology
• Non-latching magnetic switch operation
• Commonly operates from a regulated 5V supply
• Three-pin interface: Signal, VCC, and GND
• Integrated status LED on standard modules
• Compact and lightweight PCB design
• Suitable for Arduino digital input applications
• Useful for magnetic proximity detection
• Supports rotational speed and position sensing projects
• No physical contact required for magnetic detection
• Ideal for robotics and DIY electronics

Technical Specifications

• Product Name: KY-003 Hall Effect Magnetic Sensor Module
• Module Model: KY-003
• Sensor IC: A3144 or compatible Hall switch
• Sensor Type: Digital Hall Effect Switch
• Detection Method: Magnetic Field Sensing
• Output Type: Digital / Open Collector
• Output Logic: Active LOW
• Recommended Module Supply: 5V DC for standard A3144-based boards
• A3144 IC Supply Rating: 4.5V to 24V
• Magnetic Response: Unipolar
• Sensor Behavior: Non-Latching
• Interface: 3-Pin Digital
• Connection Pins: S, +, -
• Indicator: Onboard LED on common versions
• Typical PCB Dimensions: Approximately 18.5 × 15mm
• Compatible Controllers: Arduino and Other Compatible Microcontrollers
• Applications: Magnetic Detection, Position Sensing, Speed Measurement

Applications

• Arduino magnetic field detection projects
• Magnetic proximity sensing
• Contactless electronic switches
• Door and window magnetic detection
• Wheel rotation counting
• Motor speed and RPM sensing
• Robotics and automation projects
• Magnetic position sensing
• Smart home monitoring circuits
• Conveyor belt rotation detection
• DIY security and alarm projects
• Educational electronics experiments
• Embedded microcontroller projects

How Does the KY-003 Hall Effect Sensor Work?

The KY-003 Hall Effect Sensor detects magnetic fields using the Hall Effect principle.

When a magnetic field of the appropriate polarity and strength approaches the A3144 sensor, its digital output switches from HIGH to LOW.

When the magnetic field is removed or drops below the release threshold, the output returns to HIGH through the connected pull-up circuit.

This switching behavior makes the sensor suitable for detecting magnets, counting rotations, and monitoring mechanical positions without physical contact.

KY-003 Sensor Pinout

• S (Signal): Digital output pin
• + (VCC): Positive power supply
• - (GND): Ground connection

Note: Check the printed pin labels on your actual module before connecting power. Board layouts may vary between manufacturers.

Arduino Compatibility

The KY-003 module is commonly used with Arduino UNO, Arduino Nano, Arduino Mega, and other compatible microcontrollers.

The digital signal can be read using an Arduino input pin to detect whether an appropriate magnetic field is present.

For typical 5V Arduino projects, connect the module to a regulated 5V supply and use a compatible digital input pin.

Magnetic Rotation and Speed Detection

The KY-003 Magnetic Sensor Module can be used to detect the rotation of a wheel, motor shaft, or other moving mechanical component.

By attaching a suitable magnet to a rotating object, a microcontroller can count the sensor's output transitions and calculate rotational speed.

This makes the module useful for DIY RPM meters, wheel counters, robotics, and basic motion-monitoring projects.

KY-003 vs Analog Hall Effect Sensors

The KY-003 is designed primarily for digital magnetic detection rather than continuous magnetic field measurement.

• KY-003: Digital magnetic switch that indicates whether a suitable magnetic field is detected.
• Analog Hall Sensor: Produces an analog signal related to magnetic field strength.

For projects requiring digital magnetic detection, the KY-003 is a simple and convenient solution.

Why Choose KY-003 Hall Effect Sensor?

Contactless Detection: Detects magnetic fields without mechanical contact or moving switch components.

Digital Output: Provides straightforward HIGH/LOW switching information for microcontroller projects.

Compact Design: Suitable for small electronic devices, robots, and embedded systems.

Simple Integration: Three-pin connection allows easy installation in compatible circuits.

Versatile Applications: Useful for magnetic position sensing, speed detection, and automation.

Important Usage Notes

• Use a regulated supply suitable for your specific module.
• Standard A3144-based modules are typically intended for 5V operation.
• The bare A3144 IC voltage rating must not be assumed to be the safe voltage range of the assembled PCB.
• Some modules may not operate reliably at 3.3V.
• Use suitable voltage level shifting when connecting 5V outputs to 3.3V-only microcontrollers.
• Magnetic detection depends on magnet polarity, field strength, and positioning.
• The sensor does not directly measure magnetic field strength or distance.
• Do not connect motors or high-current loads directly to the sensor output.
• Verify the actual module's IC marking and pinout before installation.

Buy KY-003 Hall Effect Magnetic Sensor in Pakistan

Looking for a KY-003 Hall Effect Magnetic Sensor Module in Pakistan? Shop online at Robostan.pk for Hall Effect sensors, Arduino modules, magnetic sensors, ESP32 controllers, robotics components, and DIY electronics accessories.

The KY-003 is suitable for students, robotics enthusiasts, electronics technicians, and developers working on contactless sensing and automation projects.

Order your KY-003 Magnetic Sensor Module online from Robostan.pk with nationwide delivery across Pakistan, including Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, Peshawar, and other cities.

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