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For making 4:1 MUX/ MULTIPLEXER, we need the following components:-
1) 4 - INPUTS(D0,D1,D2,D3).
2) 2 - SELECT LINE(S0,S1).
3) 2 - NOT GATE.
4) 4 - AND GATE.
5) 1 - OR GATE.
6) 1 - BULB.
7) GROUND.
The gate level version is the right one to copy for a class, because you can trace the path from the select lines to whichever AND gate is actually enabled instead of taking the truth table on faith. Same shape scales to 8:1 with a third select line and four more AND gates.
user-52 says:
Since this one's a lab staple: after September 15 Multisim Live is gone and saved circuits go with it. The importer at CircuitSim, https://circuitsim.com, takes Multisim Live circuits. I work on it. Video here: https://www.youtube.com/watch?v=-6ZqL7cAsHw