The listing, Brand New Compass Module 3-Axis HMC5883L Magnetic Sensor for Navigation Arduino Open Source Hardware has ended.
The Compass Module is designed for low-field magnetic sensing with a digital interface. Perfect to give percise heading information.
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.
Details
Wide magnetic field range (+/-8 gauss)
1 to 2 degree compass heading accuracy
Fast 160 Hz maximum output rate
Power Requirements: 2.7 to 6.5 VDC
Communication Interface: I2C (up to 400 kHz)
Dimensions: 0.725 x 0.650 in (1.8 x 1.7 cm)
Operating temperature: -22 to +185 °F (-30 to +85 °C)