Description: This is a breakout board for Honeywell’s HMC5883L, a 3-axis digital compass. Communication with the HMC5883L is simple and all done through an I2C interface. There is no on-board regulator, so a regulated voltage of 2.16-3.6VDC should be supplied.
The breakout board includes the HMC5883L sensor and all filtering capacitors as shown. The power and 2-wire interface pins are all broken out to a 0.1" pitch header.
Dimensions: 0.7x0.7" (17.78x17.78mm)
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Works with the sketch sparkfun uses as an example, was able to create a 500 lb propane tank level indicator (propane tanks have a magnetic coupled gauge).