Half Adder Probs
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I recently assembled what seemed to be a working half adder just out of curiosity, but have encountered a problem. In binary arithmatic, 1+0=1 and carry 0. In this adder, it is 0 carry 1. I don't know what I did wrong or how to fix it... Anything helps.
This is the save ID: 1214379 (Whatever that does!)
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1214379View Save 1214379
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It seems to be fixed when i removed the diode at your leftmost AND gate.
1214437View Save 1214437By the way, tag your saves like that^ by putting the ~ symbol and the save id. "~ 1214437" minus the space.
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1214379View Save 1214379
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@RCAProduction (View Post)
What weekendgamer said is right. There is no need for the PN junction at the left side of the and gate on the left. -
Ok thanks! I'll also be making smaller circuiry... Is there any way to make a more compact AND gate?
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Ive made tiny half adders but haven't gotten arount to making a calculator, there is also a tiny AND there.
1196258View Save 1196258You don't really need the casings of the gates in your design, and the wires leading to the gates can be spaced closer together than your current design. you can also try to use INWR for logic gates as they can be placed side-by-side to METL, use PSCN or NSCN to conduct with INWR.
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You wouldn't mind if I built a calc with that, would you?
Thanks for the suggestions.
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Haha, no prob. Just don't ask me how to convert the outputs to 7-segment form. I have no clue how to do that.
