display 2digit number in 7-segment

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mahshid_2011

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Hello
i want to add two number that two number is bigger than 20 and I want to display that in the seven segment with proteuse software

my problem is i cant show 2 digit number in seven segment you can help me ?
I dont want to programming !
 

my professer want to design this circuit with proteuse software and without code and programing
**broken link removed**
**broken link removed**
in this picture I can add to 1digit and show 1digit number in seven segment
now i want to display two digit number in 7-segment**broken link removed**
 
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this could be the configuration. the displays are common anode type. for Proteus they run but when in reality you may need pnp transistor buffers for the common anode drive.
the oscillator using Gate A should be around 25HZ or Higher. the R and C values have to be chosen accordingly.
 

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perhaps it is a Homework on digital logic gates and counters /decoders. the O P clearly stated that he/she has to tdo without code or programming.
 

Last edited:

hi grieblm
I drew the circuit that you say As follows on file attachment

but it doesn't answer and for example it doesn't display 20+20

is the my circuit correct??
 
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