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.

Features:
  - Simple I2C interface
  - 2.16-3.6VDC supply range
  - Low current draw
  - 5 milli-gauss resolution
  - Dimensions: 0.7x0.7" (17.78x17.78mm)

Documents:

  - Schematic

  - Eagle Files

  - Datasheet (HMC5883L)

  - Example code (Arduino)

  - Bildr Tutorial

  - Digital Compass How-To Video