The completed robot with forward-facing sonar scanner and camouflaged aluminum wedge!
Early in development- the white you see through the spokes of the wheel is a piece of paper patterned for the wheel speed sensors
Here you can see prototypes of the weapon and shielding systems
Set for a practice battle with the class "sparring partner"
Victory!
Trying to stay awake during a coding session
A test fit of my freshly machined spike components! Just a little finish machining left to do
Found a home for my H-bridges! You can also see the fore and aft IR sensors for detecting the edge of the ring, and a better view of the wheel speed indicators.
Time for the real thing!
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Mechatronic "Sumo 'bot"

This was a group project to conceive, construct and compete an autonomous robot that must either remove from the ring or incapacitate another group's robot. We were given supplies with which to construct them, such as a chassis, servos, sensors, an Arduino, other circuitry bits, etc. We were also allowed to construct a weapon of our own design, however it had to make use of the given electrical components, if any.
We came up with a design that made optimal use of the limited resources we had (e.g., batteries, servos, pins, even processing speed). The thin, broad wedge in front helped it push other robots out of the ring, while panels on the back and top protected its sensitive electrical components from an opponent's weaponry. On top you'll find the menacing hardened-steel spike that I designed and machined myself. It leaves quite an impression!
We worked together on the electrical design and coding, including the 51-hour marathon push to the finish!

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Erik Shewan
Product Designer, Engineer, CAD guy Queens, NY