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The GY-271 module on the HMC5883L microchip is a three-axis digital magnetoresistive compass (three-coordinate magnetometer). It is used in positioning systems, tourist equipment and is especially needed in aircraft models, multicopters.
On the board of the GY-271 module there are pull-up resistors necessary for reliable operation, as well as a dc/dc converter, which allows the module to be powered from 5V. In general, the module can work with controllers with 5V signal level via the I2C bus. Three magnetoresistive sensors are used as sensors. Algorithms collect information from magnetometers and other sensors through the I2C bus without the involvement of the system processor.
To use it as a conventional compass for orientation on the ground, it is necessary to strictly fix the board horizontally, because any tilt will lead to the inclusion of the 3rd axis in the work, which will take on part of the horizontal components of the Earth's magnetic field.
Key Features:
Supply voltage: 3.3-5V
Interface: I2C
Sensor sensitivity: 5 milliGauss.
Measuring range: ±1.3-8 Gauss
Dimensions: 15x15x4 mm
Module schematic diagram:
Connection diagram:
Depending on the SCL and SDA controller legs prescribed in the code, they may be different. For programming, you can use the libraries Library1 or Library2 . The first contains a sketch of an example (code) for use in Arduino.
More detailed characteristics of the magnetometer can be found in datasheet .
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The data presented in the product description are for reference only and may differ from those indicated by the manufacturer.
To carry out technical calculations and obtain the exact parameters of the goods, use the datasheets from the manufacturer's website.
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The data presented in the product description are for reference only and may differ from those indicated by the manufacturer.
