Magnetometer Compas

Compass is based on a QMC5883L system, which allows you to specify the direction of the earth's magnetic field. Digital Compass Magnetometer GY-271  features:

• 3.3V - 6V power supply voltage
• Current consumption of 100μA (standby 2uA)
• I2C interface
• Transmission speed 400kHz
• Sensitivity 230-1370 LSB / Gs
• Resolution 0.73-4.35mGs
• Frequency of 75Hz
• Measurement of the magnetic field in three axes of ± 8 Gauss with a resolution of 5 gauss miles

• Interruption DRDY pin
• Dimensions of 14 mm x 14 mm

Three-axis electromagnetic field sensor module GY-273 including the HMC5883L chip that specifies the direction of the magnetic field of the ground.
Digital Compass GY-273 Compas Magnetometer features:

• Supply voltage: 2.16 - 3.6 VDC,
• I2C interface with SCL, SDA,
• signals - Measurement range: 1.3 to 8 Gauss,
• Measurement resolution: 12 bits,
• Measurement accuracy: 0.73 - 4.35 Gauss,
• Transmission speed 400kHz, 
• Sensitivity 230-1370 LSB / Gs,
• Output frequency: 75Hz,
• DRDY pin interruption,
• Dimensions of 18 mm x 13 mm.