built by Henry Arnold

Target Environment Locomotion Method
Indoors 2 Wheels
Sensors / Input Devices Actuators / Output Devices
IR sensors
Bump sensors
DC motor
LCD display
Control Method Power Source
Autonomous Battery
CPU Type Operating System
Motorola HC11 None
Programming Lanuage Weight
Time to build Cost to build
URL for more information
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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