Have been thinking about a way to get a motor to move according to light conditions around it. I know there are simple ways to do it already, but the idea here is to get as few and simple parts as possible at the prize of battery life. The idea is that two photoresistors decide which way the motor turns, depending on which photoresistor is in the brightest light.
here's two diagrams done i MSPaint:
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I have doubts about this second one..
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I suspect that both these circuits will use batteries at a furious rate, but that is not an issue.