Navigation System Based on Sound

The project illustrates how sound is generated based on the direction that the user must turn in order to face the correct direction as it utilizes an ATmega32, a digital compass, and a GPS.

The ability to navigate the user is demonstrated in this design based on synthesized directional audio without the use of a visual aid. The GPS and digital compass determine at what angle the user hears the sound pulses. A number of predefined locations are selected by the user on initial startup by using an LCD screen. The module determines the angle from the true North or bearing that the user must travel once the GPS has a lock. A sound is made after the angle is compared with the compass output. To give the effect of direction, the sound consists of short pulses that are delayed between the right and left side and modulated amplitude.

A standard format is used by the GPS communication which provides information including time, status, latitude, longitude, speed, and date. The digital compass used was a Hitachi HM55B which uses 3 wires in an SPI like fashion, in order to communicate with this device.

Rest of the project