Configuration sensing for a mobile computing device

A mobile computing device, comprising:

• a housing having a sliding structure arranged to allow a first housing portion and a second housing portion to move relative to each other to form a first configuration or a second configuration;
• a magnetic sensor disposed in the first housing portion, the magnetic sensor operative to measure a magnetic field strength for a magnet, and output a position signal indicative of the first configuration or the second configuration based on the measured magnetic field strength;
• and
• a speaker with the magnet disposed in the second housing portion;
• and

A method, comprising:

• measuring a magnetic field strength produced by a speaker magnet;
• generating a first position signal when the measured magnetic field strength is higher, the first position signal representing a first configuration for a mobile computing device;
• and
• generating a second position signal when the measured magnetic field strength is lower, the second position signal representing a second configuration for the mobile computing device.