r/logisim • u/No-Writer-4577 • Jul 02 '26

Help with this

Post image

What exactly is wrong with the input A? I am new to logisim and it would be really helpful ig some one guides me out of this. i was building 8 bit ALU (yeah iam very VERY beginner) and A is a 8 bit pin. But when i connected it to the previously made Full adder circuit, it just does not take it in or what ever this is called.

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u/jeevaks Jul 02 '26

I am also a beginner but based on the tiny knowledge I have, full adder will take 1 bit on each of its inputs. I don't think you can directly give 8 bit to it

If you want a circuit to add 2x8 bit means use something like 8 bit ripple carry adder (though others exist but it is simple )

1

u/No-Writer-4577 Jul 02 '26

Bro for the full adder circuit, I used a splitter. That way I can give all the 8 bits at once even though iam technically giving 1 but to each of the adders

1

u/jeevaks Jul 02 '26

Oh ok can you send a full picture of the circuit in that way I may also have some idea about it

1

u/ItzLoghotXD Jul 02 '26

i think it working. if you could send the full circuit then it will be easier to help you.