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Merry Christmas or the secular, religious, or pagan holiday of your choice. I love this little Christmas ornament from Instructables, so I decided to build some this year. The picture shows a few of the completed bots. I had trouble getting the original circuit working, so I substituted this one from 'Evil Mad Scientist'. The cool thing about this simple little circuit is that the solar panel effectively acts as the dark detector. When there's no light to power the solar panel, a PNP transistor ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/christmas-robots