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Technical description of Sumo Bob II
Sumo Bob II was constructed using two HiTech low Profile aileron servos. The servos have been modified removing all of the original electronics and for continuous rotation. They are now just motors with gearboxes. The wheels are Dave Brown model airplane wheels.
The servos are mounted to two aluminum blocks so that they are mounted bottom to bottom. The aluminum blocks serve as the chassis to mount all the rest of the components.
The motors are controlled using a dual H-Bridge. Each half of the H-Bridge is driven by a PIC chip programmed to produce the necessary Pulse Width Modulation signal (PWM) under command from the main processor.
The Main processor is a Basic Stamp II.
The front of the bot is shaped from a piece of Sig sheet aluminum, which was formed using a vice, wooden blocks and a mallet. It was then painted.using model paints.
The object sensor is an infrared unit, which was purchased as a short kit and completed using parts from various electronic supply houses.
The edge of ring detector is a Cadmium Sulfide Cell and uses the RC time command in the Basic Stamp software.
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