Difference between revisions of "Sensor-Hall"

mCookie-Hall

Product number of mCookie Sensor—Hall:MSDS41

mCookie Sensor-Hall is a HAL49E linear hall sensor, which can detect the strength of the magnetic field.

Sensor hall is a magnetic field sensor based on Hall effect.

Hall effect is a kind of magnetoelectric effect, which is found by Hall（A.H.Hall，1855—1938）on 1879 when he was studying the conduction mechanism of the metal.

Description of Sensor Pins

Pins of the sensor: PIN1: GND PIN2: VCC General signal pins: PIN3(IO1): digital/analog signal PIN4(IO2): NC(null) Special signal pins: If it is IIC: IO1/IO2 are respectively SDA/SCL. If it is soft serial port: IO1/IO2 are respectively tx/rx.

Special to Sensor-Hall sensor pins PIN1: GND PIN2: VCC PIN3(IO1): Analog signal input PIN4(IO2): NC Microduino sensor can communicate with core module through the connection with Microduino-Module Sensor Hub.

Features

• With high detection sensitivity, and stability.
• A linear hall sensor with a polarity.

Specification

• Sensor voltage
  • 3.3V~5V working voltage

• Size of the sensor
  • Size of the board: 23.5mm*13mm;
  • 1.27mm-spacing 4Pin interface connected with sensorhub;
  • Sensor CAD drawings: File:Sensor CAD.zip.

• Function description
  • This sensor is 10-bit ADC（0~1023）, and the static value that the pin IO1 gets is 512;
  • The strength of the magnetism changes according to south and north poles;
    • If get close to the hall circuit from the back with the N pole, the output voltage will reduce, and the analog value will reduce（512~0）, too;
    • If get close with S pole from the back, the output voltage will increase and the analog input value will increase（512~1023）, too;
    • If from the front, the output state is opposite to from the back.

• Connection
  • This sensor can be connected with the following interfaces of the core: A0~A7.

Documents

• Schematic diagram: File:Microduino Hall.Zip.pdf
• HAL49E datasheet: File:Microduino Hall datasheet.pdf

Development

Program Download

• Download and unzip the program File:Microduino Hall Test.zip

Programming

• Follow the Software Getting Started Guide.
• Select the Board, Processor and Port.
• Click [File]->[Open], browse to the project program address, and click "Microduino_Hall_Test.ino" to open the program.
• After confirming all these items are correct, click "→" to download the program to the development board.

Hardware Setup

• Referring to the following picture, connect the Sensor-Hall to the analog interface A0 of Microduino-Sensorhub.

Effect Observation

• After the download, open the serial port monitor.
  • Get close to the hall circuit from the back with S pole. The output voltage of both ends of the hall sensor is during 2.5V~5V, and the analog value it returns is during 512~1023.
  • Get close to the hall circuit from the back with the N pole. The output voltage of both ends of the hall sensor is during 2.5V~0V, and the analog value it returns is during 512~0.
  • If get close to the circuit from the front, the output state is opposite to from the back.

Application

• It is suitable for the detection of magnetic field strength.

Projects

Purchase

History

Gallery

Microduino-Hall Front

Microduino-Hall Back