Description
So if you are looking for a sensor to detect magnet for measuring speed of a moving object or just to detect objects then this sensor might be the perfect choice for your project.A hall-effect sensor as then name suggests works with the principle of hall-effect and is used to detect magnets. Each side of the sensor can detect one particular pole. It can also be easily interfaced with a microcontroller since it works on transistor logic.
Technical Specification:
- Operating Voltage: 5V DC
- Digital Output 0V or 5V direct interface to a microcontroller with LED indication
- Sensor: Allegro A3144 Hall-effect switch
- LM393 comparator with threshold preset
- PCB Size: 32x12mm
- Detector type: Magnetic Sensing Hall effect
- Detecting range: 7 mm LM393 based design
- Easy to use with Microcontrollers or even with normal Digital/Analog IC
- Small, cheap and easily available
Features:
- Operating Voltage: +5V DC
- Digital Output 0V or 5V direct interface to microcontroller with LED indication
- Sensor: Allegro A3144 Hall effect switch
- LM393 comparator with theshold preset
- PCB Size: 32x12mm
- Detector type: Magnetic Sensing Hall effect
- Detecting range: 7 mm
Pin Diagram: 
Pin Description:
- VCC: The Vcc pin powers the module, typically with +5V
- GND: Power Supply Ground
- DO: Digital Output Pin. Directly connected to digital pin of Microcontroller
- AO: Analog Output Pin. Directly connected to an analog pin of Microcontroller
Applications:
- Tachometer
- Speed Detecting of fan and motors
- Docking Detection
- Door Open and Close Detection
- Proximity Sensing
- Valve Positioning
- Pulse Counting