CMPS03 - Robot Compass Module is specially designed for robot navigation. Using Philips KMZ51 magnetic field sensor, it can detect the Earth's magnetic field. The horizontal direction of the Earth's magnetic field is computed by the output of two sensors mounted at right angles to each other. The module requires a 5V power supply at a nominal 15mA. There are two ways to obtain bearing from the module. A PWM signal is available on pin 4, or an I2C interface is provided on pins 2,3.
