{"product_id":"ky-003-hall-effect-magnetic-sensor-module-a3144-for-arduino","title":"KY-003 Hall Effect Magnetic Sensor Module – A3144 for Arduino","description":"\n\u003ch2\u003eKY-003 Hall Effect Magnetic Sensor Module – A3144 Digital Sensor for Arduino\u003c\/h2\u003e\n\n\u003cp\u003eBuy the \u003cstrong\u003eKY-003 Hall Effect Magnetic Sensor Module\u003c\/strong\u003e online in Pakistan from \u003cstrong\u003eRobostan.pk\u003c\/strong\u003e. This compact digital magnetic field detection module is designed for Arduino, robotics, automation, magnetic proximity sensing, speed detection, and DIY electronics projects.\u003c\/p\u003e\n\n\u003cp\u003eFeaturing the \u003cstrong\u003eA3144 Hall Effect Sensor IC\u003c\/strong\u003e, 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.\u003c\/p\u003e\n\n\u003cp\u003eThe module features a convenient \u003cstrong\u003e3-pin interface, digital output, and onboard indicator LED\u003c\/strong\u003e on common versions, making it useful for magnetic switches, contactless position detection, rotation counting, and electronic control systems.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKY-003 digital Hall Effect magnetic sensor module\u003c\/li\u003e\n\u003cli\u003eBased on the A3144 Hall Effect switch IC\u003c\/li\u003e\n\u003cli\u003eContactless magnetic field detection\u003c\/li\u003e\n\u003cli\u003eDigital HIGH and LOW output signals\u003c\/li\u003e\n\u003cli\u003eActive-low magnetic detection output\u003c\/li\u003e\n\u003cli\u003eUnipolar magnetic sensing technology\u003c\/li\u003e\n\u003cli\u003eNon-latching magnetic switch operation\u003c\/li\u003e\n\u003cli\u003eCommonly operates from a regulated 5V supply\u003c\/li\u003e\n\u003cli\u003eThree-pin interface: Signal, VCC, and GND\u003c\/li\u003e\n\u003cli\u003eIntegrated status LED on standard modules\u003c\/li\u003e\n\u003cli\u003eCompact and lightweight PCB design\u003c\/li\u003e\n\u003cli\u003eSuitable for Arduino digital input applications\u003c\/li\u003e\n\u003cli\u003eUseful for magnetic proximity detection\u003c\/li\u003e\n\u003cli\u003eSupports rotational speed and position sensing projects\u003c\/li\u003e\n\u003cli\u003eNo physical contact required for magnetic detection\u003c\/li\u003e\n\u003cli\u003eIdeal for robotics and DIY electronics\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e KY-003 Hall Effect Magnetic Sensor Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Model:\u003c\/strong\u003e KY-003\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor IC:\u003c\/strong\u003e A3144 or compatible Hall switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor Type:\u003c\/strong\u003e Digital Hall Effect Switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetection Method:\u003c\/strong\u003e Magnetic Field Sensing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Type:\u003c\/strong\u003e Digital \/ Open Collector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Logic:\u003c\/strong\u003e Active LOW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Module Supply:\u003c\/strong\u003e 5V DC for standard A3144-based boards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA3144 IC Supply Rating:\u003c\/strong\u003e 4.5V to 24V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic Response:\u003c\/strong\u003e Unipolar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor Behavior:\u003c\/strong\u003e Non-Latching\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e 3-Pin Digital\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Pins:\u003c\/strong\u003e S, +, -\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicator:\u003c\/strong\u003e Onboard LED on common versions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical PCB Dimensions:\u003c\/strong\u003e Approximately 18.5 × 15mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Controllers:\u003c\/strong\u003e Arduino and Other Compatible Microcontrollers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Magnetic Detection, Position Sensing, Speed Measurement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eArduino magnetic field detection projects\u003c\/li\u003e\n\u003cli\u003eMagnetic proximity sensing\u003c\/li\u003e\n\u003cli\u003eContactless electronic switches\u003c\/li\u003e\n\u003cli\u003eDoor and window magnetic detection\u003c\/li\u003e\n\u003cli\u003eWheel rotation counting\u003c\/li\u003e\n\u003cli\u003eMotor speed and RPM sensing\u003c\/li\u003e\n\u003cli\u003eRobotics and automation projects\u003c\/li\u003e\n\u003cli\u003eMagnetic position sensing\u003c\/li\u003e\n\u003cli\u003eSmart home monitoring circuits\u003c\/li\u003e\n\u003cli\u003eConveyor belt rotation detection\u003c\/li\u003e\n\u003cli\u003eDIY security and alarm projects\u003c\/li\u003e\n\u003cli\u003eEducational electronics experiments\u003c\/li\u003e\n\u003cli\u003eEmbedded microcontroller projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow Does the KY-003 Hall Effect Sensor Work?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eKY-003 Hall Effect Sensor\u003c\/strong\u003e detects magnetic fields using the Hall Effect principle.\u003c\/p\u003e\n\n\u003cp\u003eWhen a magnetic field of the appropriate polarity and strength approaches the A3144 sensor, its digital output switches from HIGH to LOW.\u003c\/p\u003e\n\n\u003cp\u003eWhen the magnetic field is removed or drops below the release threshold, the output returns to HIGH through the connected pull-up circuit.\u003c\/p\u003e\n\n\u003cp\u003eThis switching behavior makes the sensor suitable for detecting magnets, counting rotations, and monitoring mechanical positions without physical contact.\u003c\/p\u003e\n\n\u003ch3\u003eKY-003 Sensor Pinout\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eS (Signal):\u003c\/strong\u003e Digital output pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e+ (VCC):\u003c\/strong\u003e Positive power supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e- (GND):\u003c\/strong\u003e Ground connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Check the printed pin labels on your actual module before connecting power. Board layouts may vary between manufacturers.\u003c\/p\u003e\n\n\u003ch3\u003eArduino Compatibility\u003c\/h3\u003e\n\n\u003cp\u003eThe KY-003 module is commonly used with Arduino UNO, Arduino Nano, Arduino Mega, and other compatible microcontrollers.\u003c\/p\u003e\n\n\u003cp\u003eThe digital signal can be read using an Arduino input pin to detect whether an appropriate magnetic field is present.\u003c\/p\u003e\n\n\u003cp\u003eFor typical 5V Arduino projects, connect the module to a regulated 5V supply and use a compatible digital input pin.\u003c\/p\u003e\n\n\u003ch3\u003eMagnetic Rotation and Speed Detection\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eKY-003 Magnetic Sensor Module\u003c\/strong\u003e can be used to detect the rotation of a wheel, motor shaft, or other moving mechanical component.\u003c\/p\u003e\n\n\u003cp\u003eBy attaching a suitable magnet to a rotating object, a microcontroller can count the sensor's output transitions and calculate rotational speed.\u003c\/p\u003e\n\n\u003cp\u003eThis makes the module useful for DIY RPM meters, wheel counters, robotics, and basic motion-monitoring projects.\u003c\/p\u003e\n\n\u003ch3\u003eKY-003 vs Analog Hall Effect Sensors\u003c\/h3\u003e\n\n\u003cp\u003eThe KY-003 is designed primarily for digital magnetic detection rather than continuous magnetic field measurement.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKY-003:\u003c\/strong\u003e Digital magnetic switch that indicates whether a suitable magnetic field is detected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Hall Sensor:\u003c\/strong\u003e Produces an analog signal related to magnetic field strength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor projects requiring digital magnetic detection, the KY-003 is a simple and convenient solution.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose KY-003 Hall Effect Sensor?\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eContactless Detection:\u003c\/strong\u003e Detects magnetic fields without mechanical contact or moving switch components.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDigital Output:\u003c\/strong\u003e Provides straightforward HIGH\/LOW switching information for microcontroller projects.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompact Design:\u003c\/strong\u003e Suitable for small electronic devices, robots, and embedded systems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSimple Integration:\u003c\/strong\u003e Three-pin connection allows easy installation in compatible circuits.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e Useful for magnetic position sensing, speed detection, and automation.\u003c\/p\u003e\n\n\u003ch3\u003eImportant Usage Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse a regulated supply suitable for your specific module.\u003c\/li\u003e\n\u003cli\u003eStandard A3144-based modules are typically intended for 5V operation.\u003c\/li\u003e\n\u003cli\u003eThe bare A3144 IC voltage rating must not be assumed to be the safe voltage range of the assembled PCB.\u003c\/li\u003e\n\u003cli\u003eSome modules may not operate reliably at 3.3V.\u003c\/li\u003e\n\u003cli\u003eUse suitable voltage level shifting when connecting 5V outputs to 3.3V-only microcontrollers.\u003c\/li\u003e\n\u003cli\u003eMagnetic detection depends on magnet polarity, field strength, and positioning.\u003c\/li\u003e\n\u003cli\u003eThe sensor does not directly measure magnetic field strength or distance.\u003c\/li\u003e\n\u003cli\u003eDo not connect motors or high-current loads directly to the sensor output.\u003c\/li\u003e\n\u003cli\u003eVerify the actual module's IC marking and pinout before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBuy KY-003 Hall Effect Magnetic Sensor in Pakistan\u003c\/h3\u003e\n\n\u003cp\u003eLooking for a \u003cstrong\u003eKY-003 Hall Effect Magnetic Sensor Module in Pakistan\u003c\/strong\u003e? Shop online at \u003cstrong\u003eRobostan.pk\u003c\/strong\u003e for Hall Effect sensors, Arduino modules, magnetic sensors, ESP32 controllers, robotics components, and DIY electronics accessories.\u003c\/p\u003e\n\n\u003cp\u003eThe KY-003 is suitable for students, robotics enthusiasts, electronics technicians, and developers working on contactless sensing and automation projects.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOrder your KY-003 Magnetic Sensor Module online from Robostan.pk\u003c\/strong\u003e with nationwide delivery across Pakistan, including Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, Peshawar, and other cities.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRobostan.pk – Build. Innovate. Create.\u003c\/strong\u003e\u003c\/p\u003e\n","brand":"ROBOSTAN","offers":[{"title":"Default Title","offer_id":68373761851758,"sku":null,"price":120.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1019\/7391\/8062\/files\/ChatGPTImageNov13_2026_04_12_31PM-3.png?v=1794568678","url":"https:\/\/robostan.pk\/products\/ky-003-hall-effect-magnetic-sensor-module-a3144-for-arduino","provider":"ROBOSTAN","version":"1.0","type":"link"}