Compass Module 3-Axis HMC5883L

The Compass Module 3-Axis HMC5883L is designed for low-field magnetic sensing with a digital interface. This compact sensor fits into small projects such as UAVs and robot navigation systems.

The sensor converts any magnetic field to a differential voltage output on 3 axes. This voltage shift is the raw digital output value, which can then be used to calculate headings or sense magnetic fields coming from different directions. Example code in PBASIC, Spin, and C are provided in the Downloads.

Features:

• Measures Earth’s magnetic fields
• 3-axis magnetoresistive sensor
• Wide magnetic field range (+/-8 gauss)
• 1 to 2 degree compass heading accuracy
• Precision in-axis sensitivity and linearity
• I²C digital Interface
• Fast 160 Hz maximum output rate
• Designed for use with a large variety of microcontrollers with different voltage requirements

Application Notes:

• Auto and personal navigation
• UAV systems
• Robotic navigation
• Location-based services (LBS)

Key Specifications:

• Power Requirements: 2.7 to 6.5 VDC
• Communication Interface: I²C (up to 400 kHz)
• Operating temperature: -22 to +185 °F (-30 to +85 °C)
• Dimensions: 0.725 x 0.650 in (1.8 x 1.7 cm)

Note: For tilt compensation, you will need to use an accelerometer along with this module. See the application notes for details on tilt compensation.

Downloads & Resources:
Compass Datasheet (.pdf)
Compass Example Spin Source Code (.zip)
Compass Example BS2 Source Code (.zip)
Compass Example PDE Source Code (.zip)
Compass AppNote 1 (.pdf)
Compass AppNote 2 (.pdf)