I was working on a walking robot body, when I put on the rear motor/legs I saw that it stood up really well with a wheel put on it, so I decided to make it into a BEAM light seeker, just because of the simplicity and ease of it, not to mention the thrill of others seeing a light tracking robot, even though they dont know it is such a simple circuit!
Using the traditional BEAM light tracking robot and IR LED's, I completed it in under 30 minutes, a record
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I took the e off google, as a joke for lawsuit purposes
As for operation, for a demonstration to a 7 year old, it picks up light we cant see (IR), light we can see, and light itcant see (UV)
Cool little robot. Now modify it to use a solar panel.
This one would produce some interesting behavior, but it probably isn't powerful enough judging from the size of your motor and 'bot: **broken link removed**