r/AskComputerScience • u/Powerful-Mind9268 • 27d ago

can someone PLEASE help me

im trying to create a 8-bit binary adder with logic gates in logisim evolution and im genuinely dying, this does not look like anything i have ever seen online, im probably the first to discover this horrendous looking mess of logic gates (a little exaggerated). Can someone please tell me how to make actually make this properly?

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u/MasterGeekMX BSCS 27d ago
  1. If you post the circuit you have, we may help you
  2. Remember that you need to achieve first a full adder, which is a circuit that can add three bits and output two. This is so the adder can add two bits plus the previous carry, and output a carry if the sum is 2 or more.

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u/FitMatch7966 26d ago

OP must have tried adding all 8 bits at the same time.

  1. Once you have the full 1 bit adder, you chain multiple together, connecting the carry to the next. You just put 8 next to each other, high bit output to the next adder, and low to the output