Soldering Station

CMPS-03 is an electronic compass built specifically for Robots navigation. It detects the earth's magnetic field to determine directions. It works on 5V, 15mA supply. Its output can be taken in two ways:

1) By a PWM Pulse:
In this method it outputs a pulse whose width varies from 1ms(0 degree) to
36.99ms(359.9 degree). One can connect it directly to a microcontroller and set the micrcontroller to measure the width of the pulse.

2) By I2C protocol
You can also get the output through I2C prtocol. You just have to connect its SDA and SCL pins with the respective pins of your controller and here you go.

N.B. If you are not using I2C then donot forget to pull high SDA and SCL pins of the compass to 5V.

You can get the complete documentation about this wonderful invention here.