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I have four simple wires and I need logic which reacts when two of them are active. I tried using a combiner outputting to a calculator, and then checking if the value is greater than 2, but the results are weird!
One signal is 1.0
Two signals are 1.41
Three signals are 1.73
Four signals are 2.0
Hmm! That's the square root of the number I was expecting! Well I thought - I'll square it then check if it's greater than 2.
Nope, 2^2 output to another calculator is... 2. What's going on here, and how can I make this work?