Plexi by Henry Arnold

Plexi is constructed using a plexiglass display dome for his top and
heat bent plexiglass for the tubular body. All other parts are simple
flat cut pieces. He uses a New Micros 68HC11 single board computer
running BASIC11. 18 Infrared and switch bump sensors allow him to
navigate around a room without bumping into things. A 
home brew closed loop motor control system allows accurate
distance and turning motions. An RS-485 network of STAMPs and PICs
provide extra functions such as LCD display, sound, and status modules.
The motor gearboxes came from a child's motorized vehicle and battery
power is a 12V 6ah gell cell battery. Plexi has simple maze navigation
abilities and random wander routines. He also reacts to his
environment using his sound and display abilities.


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