We all know XNOR's truth table right? Is it possible to design a switch circuit (not a gate circuit) using XNOR's truth table value. I had tried for 40 mins and it seems impossible.
Switch Circuit Example:
image
switches
We all know XNOR's truth table right? Is it possible to design a switch circuit (not a gate circuit) using XNOR's truth table value. I had tried for 40 mins and it seems impossible.
Switch Circuit Example:
image
Best Answer
In this position the lamp will be on. Switch A to the down position and the lamp will be off. Switch B to the down position and the lamp goes on again. So the lamp will be on if both switches are in the same position:
This is equivalent to the XNOR's thruth table:
To extend this circuit to more switches you need a "cross switch" (not sure about the name, in Dutch it's "kruisschakelaar"):
Changing the position of any switch will change the lamp's state, which is what you want if you want to control the lights in your living room from 2 or more points.