George

built by Ben DeKraker

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Target Environment Locomotion Method
Indoors 3 Wheels
Sensors / Input Devices Actuators / Output Devices
Bump sensors
Sharp IR proximity detectors
Ultrasonic range finders
N/A
Control Method Power Source
Autonomous Battery
CPU Type Operating System
Intel 80x86 DOS
Programming Lanuage Weight
BASIC N/A
Time to build Cost to build
N/A $150
URL for more information
N/A
Comments
George was started in 2000 with a friend, Bob Potter. The robot is designed to stay indoors, navigate through a building, and perhaps warn about any trouble (fire, etc). The aluminum frame was constructed around my Bondwell computer. The 24vdc, 140 rpm gear motors were bought from All Electronics (www.allelectronics.com). Custom bushings were used to attatch the lawn mower wheels. The control computer is a Bondwell 286 laptop, which I stripped of its case and LCD screen for weight. The control program is written in QuickBasic 4.5, and controls the motors via a dual H-Bridge. There are no sensors (yet), but we plan to add bump switches, a Sharp infra-red distance sensor, and maybe an ultrasonic sensor. These sensors will allow George to navigate inside a building without (hopefully!) hitting anything. Power is provided from a pack of Ni-Cad rechargables, and we hope the robot will be able to locate and "dock" at his charger. So far, we have run into several problems, many of them solved. We had a hard time securing the wheels onto our flattened motor shafts. A custom bushing fixed this, but the bushings are not very strong. I, being in charge of the computer and electronics, also had a hard time figuring out all the input/output commands. I'm still working out the snafus as we go. If there is another robot out there named George, contact me and I'll gladly change his name, or perhaps tack on a "W". ;-) -Ben DeKraker Email: bdekraker@hotmail.com

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