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Here is a brainless, nameless, clueless little vehicle that chases the light. It's a photovore. Well, it actually is just a photophile. It does not eat the light, it just likes it. 1069-A1 (by lack of a better name) is powered by 4 AA cells (NiMh rechargeable), not by a photo voltaic cell. Each motor has its own light sensing circuit. The two LDR on stilts are directed in opposite directions. Each LDR is part of a voltage divider with a pot. The resulting voltage is sent into a darlington of two ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/1069-a1