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This is one of my PAT's for school, its supposed to be a tool to teach the logic gates and, or, nand, and nor. I've combined them all to one circuit that will use a 9 volt battery. you can switch between which gates you want to see by switching the switches by each led. this is so that you can see the relation each logic gate has to each other. it could be much simpler I believe but we have to construct our logic gates in a certain way for this project so :\. there is a switch by the 2.2k ohm resistor leading to the or gate, this is because I find that resistor and path redundant and all it does is waste the battery, as far as I can tell, but I need it in there for the project so I kept it in.
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