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Topic: Full adder circuit and BCD to decimal. (Read 1 time) previous topic - next topic

adilmalik

I am trying to make a 4-bit full adder circuit using the 7000 series logic ics. I plan on using:

2x quad AND gates ic

2x quad OR gates ic

1x quad XOR gate ic

using this diagram:
http://en.wikipedia.org/wiki/File:Full_Adder.svg

My first question is, is this possible?

Secondly i know that the output would be in binary, is there any ic capable of converting this binary into decimal to drive a 7 segment display?

Thanks in Advance.

robtillaart

enough IC's

you could use an Arduino as convertor :)

or a 4511 IC - http://www.nxp.com/documents/data_sheet/74HC_HCT4511_CNV.pdf -
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

Grumpy_Mike

Quote
My first question is, is this possible?

Yes.

Quote
is there any ic capable of converting this binary into decimal to drive a 7 segment display?

Yes 74LS47

adilmalik

haha i was thinking of the same thing! use the arduino to do that :)


can i use the 4000 series logic ics with the 7000 series one?

adilmalik

Also will these ics do?

74LS08 Quad 2 i/p AND
74HC86 Quad EX-OR    
74LS32 Quad 2-i/p OR
?????

MarkT

Quote
I plan on using:

2x quad AND gates ic

2x quad OR gates ic

1x quad XOR gate ic

using this diagram:
http://en.wikipedia.org/wiki/File:Full_Adder.svg


With that circuit I'd get 2x the XOR chip and 1x the OR chip.  In fact I'd get a spare of each too in case one gets damaged...
[ I won't respond to messages, use the forum please ]

Graynomad

I assume you have a good reason to do this in hardware, it can't be speed because the result goes to an LED for (presumably) a human to read.

______
Rob
Rob Gray aka the GRAYnomad www.robgray.com

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