As the cost of human labor rises, businesses are looking for ways to replace repetitive jobs with that of machines. The goal of this project is to replace a human mail carrier with a microcontrolled vehicle that can do the same job. Employing an Intel 8751 controller, this vehicle has a guidance system that uses two light-sensitive, charged-coupled diode arrays to follow a path. The vehicle also has a collision avoidance system that uses two forty kilohertz transducers in a sonar system for object detection.
 

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