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Sumo Bot - Many people start very early on with a Mini Sumo bot. I waited over 4 years, but finally got around to it. Mainly to provide some motivation for beginners in DARC, but it's a cool project.
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Here's a full view of the bot. The scoop on the front exceeds the 10 cm restriction on the long axis, so I have to revisit, but for now the goal is to just have something that runs for the club competitions. Brains are provided via the DARC board. There are 2 sensors. A Fairchild QRB1134 reflective IR sensor looks down to sense the white line/black surface. A Sharp GP2D120 provides the forward looking detection sensor. The main frame is made from easily cuttable and drillable 1/4" expanded PVC that I bought at a local plastics supplier in Denver (S and S Plastics). You can also buy 12x12" sheets of this material from budgetrobotics.com. The front scoop is 1/8" aluminum. Power is supplied from 4 AAs in a battery clip inside the chassis. |
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| Sharp IR ranging sensor looks ahead for opponents. The ability to "pan" back and forth is done by moving the entire robot platform. | Back view shows the battery compartment (4 AA's clip) tucked up under the circuit board. The servo mounts are right angle brackets I bought from budgetrobotics.com. As is the nylon caster on the back for balance. The wheels are from Acroname. | This bottom view shows the Fairchild QRB1134 sensor piercing the aluminum front scoop. I made the scoop with 1/8" thick aluminum angle stock, bending the 90 degree stock into a much gentler 20 or so degrees. |
I programmed the Sumo Bot with BASCOM (basic language). The algorithm is very basic
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