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Logic Circuits

MULTIPLEXER (MUX)

Selects one of several input signals and routes it to a single output, based on a select signal. A 2-to-1 MUX has 2 data inputs and 1 select line. Essential for bus routing.

When to Use

Signal routing, data bus selection, programmable circuits, ALU input selection, display multiplexing.

Materials

  • ▸2+ Redstone Repeaters
  • ▸AND gate components
  • ▸OR gate components
  • ▸NOT gate components

How to Build

  1. 1For a 2-to-1 MUX: create a select signal S and its inverse NOT S.
  2. 2AND input A with S (A passes when S is ON).
  3. 3AND input B with NOT S (B passes when S is OFF).
  4. 4OR the two AND outputs together to get the final output.
  5. 5When S=1, output=A. When S=0, output=B.
  6. 6Chain MUXes for more inputs (4-to-1, 8-to-1, etc.).

Variants

  • ▸2-to-1 MUX (basic, 1 select line)
  • ▸4-to-1 MUX (2 select lines, 4 data inputs)
  • ▸Analog MUX (routes signal strength values using comparators)
  • ▸Piston-based MUX (physically connects/disconnects signal paths)
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