[Dr. Cockroach] figured out a way to create ... logic gate using a 910 Ohm, output LED, and an LED and LDR in parallel. The output is initially 4.5V for logic 1 and 1.5V for logic 0. Adding two ...

While it is true that you can build logic gates using switch logic (that is, two switches in series are an AND gate and two in parallel are an OR gate), it isn’t the only way. If you are wiring ...