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3D Printing Class
So something like this would work?https://www.amazon.com/uxcell-Photoresistor-Resistors-Light-Dependent-Resistance/dp/B00G9JPHKY/ref=sr_1_28?s=industrial&ie=UTF8&qid=1475610232&sr=1-28&keywords=photocell
Okay, thank you.
What photocell did you use?
Metropolis - a K'nex Ball Machine
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