- #1
AilingLore21
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Homework Statement
We are asked to make a subtractor circuit which has a 2 bit, 2 input data.
Homework Equations
A1A0
_
B1B0
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The Attempt at a Solution
I would have a 3 bit output with one borrow. The problem is I am stuck at this point and am having troubles forming an equation. Someone lent me their diagram and this is what I have
I have tried building this on the breadboard but it gives off an erroneous result at the 7 segment cathode with the ls48 decoder for the 4th time I assembled this. It only gives off 0 and 4 at the LED matrix when it should be 3,2,1,0. The upper LED is the rightmost bit while the third led is the third bit