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Sauerkraut Powered Robots by Jesse Hemminger

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Uploaded on Oct 23, 2011

Inspired by children's lemon battery experiments, the Sauerkraut Powered Robots draw their power from a chemical reaction between copper and zinc electrodes placed in a jar of sauerkraut to create a sauerkraut battery. Pieces of pencil lead are attached to the robots turning them into drawing machines: one scribbles, one draws a line, and one makes a circle. The circle can be seen as a reminder that we are all part of one community, one planet.

Oh yeah, I was going to post technical info too. I'm using beam robotics circuits from:
http://www.solarbotics.net/library/ci...

The first robot you see in the video is actually a kit from Solarbotics.com
http://www.solarbotics.com/products/s...

I just removed the solar panel and connected the Sauerkraut Batteries. I also attached pencil lead so it would draw me a picture.

The next one you see in the video is my own creation, I just bought the individual components from Solarbotics.com, added a limit switch and extra motor to the Miller Engine circuit design from Solarbotics.net, and freeform soldered it together into what I think looks like a little crustacean. The limit switch makes it a wall following bot by simply switching between the two motors.

http://www.solarbotics.net/library/ci...

The orange robot is a Hexbug Ant that I circuit bent by removing the batteries and adding a Miller Engine so it could be powered by the Sauerkraut. This one has a much much larger capacitor (.35 F instead of .0047 F) so it takes much longer to charge up, but when it goes it also goes for much longer.

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