On a student's budget, even the $200 total cost cap for a food munching, manure throwing, autonomous hippo seems pretty steep. And since we had only 3 people and a strategy of doing a lot of prototyping, we couldn't afford to spend $200 on the final bot in addition to the costs of getting there. We tried to work with the components we had and use cheap materials (cardboard, hot glue, scrap masonite, etc.) and the cost were kept reasonable. Here is an estimated cost breakdown of what everyone spent on the final robot...
Mike:
-$40 on drive motors
-$5 on acrylic
LeAnn:
-$25 for acrylic
-$20 on various components and the servo
Orion:
-$20 on wheels and ball casters
-$20 on wire, switches, a breadboard, and other components
-$5 on motor shafts and hardware
Free Parts:
-C32 and motor driver boards, Maxon motors, and lithium batteries from the lab
-Stepper motor from our coach (go Cole!)
-Some scrap acrylic
-A piece of scrap aluminum
-A solenoid from out of the scrap bin at the beginning of the quarter
This brings the approximate cost of the final robot to be something like $135, which is pretty reasonable when split 3 ways.
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