While this can detect magnetic fields in three axes, just one is necessary for building a device that operates akin to a traditional compass. The output of the device is read by an Arduino Nano ...

We don’t have much personal experience with DOF hardware, but this Arduino library which reads ... a demo design using a Honeywell HMC5883L compass and a Freescale MMA8453Q accelerometer ...

Watch the video below to learn more about this awesome DIY Arduino watch that uses a GY-87 sensor board, that offers three sensors in the form of HMC5883L for the compass, BMP085 for the pressure ...