I was playing with some electronics recently, and I had bought three logic gates to make a small flat device that took two inputs, I1 and I2, and returned them in the opposite order (I2 then I1).
Unfortunately, I was using some acid to separate a couple of pieces of metal that were soldered together, and I hadn't put away my device, so a drop of acid fell down and melted away a section of one of the wires. Frantically I tested my device, and it just returned the inputs in the order they were entered.
I chucked the device away and bought some new materials, but the day after the rubbish was collected, I realised I forgot to make a circuit diagram. All I remembered was that the gates were 2 input, 1 output, and that they were symmetric in their inputs (so the first input being high and the second being low had the same output as the second input being high and the first low).
Can you recreate the circuit diagram for me, and tell me on which segment of wire the acid spilt?
The device was flat, so no wire crossings occured.
The diagram needs to be accurate up to topology.
The flow went strictly in the direction from the input side to the output side, so there were no loops.
The wires did split at points, but two wires only joined at a gate.
The device looked like this:
I1 ->- ->- O1 \ / [THE CIRCUIT] / \ I2 ->- ->- O2
I2=O1, but after the acid was spilt