need help!!

[iloveelectronic]

hi,
i just build a 4bits(mybad) subtractor, and i wanted to add a dual 7 segment display on it but I can't figure how to do it. Could someone post the schematic for me please?

thx

 

[Hero999]

This isn't college work is it?

 

[iloveelectronic]

no this is grade 11 work.

 

[Hero999]

We don't mind helping you but we won't do all of the work for you. Please post what you've already done including any ideas you've had and we might be able to make some suggestions. If you've got completely no idea then may be it's your lecuturer's fault and it isn't right that you make him/her look good by cheating and copying from the Internet.

 

[iloveelectronic]

uhh well this is not really the work... this is just for my own knowledge. basicly my own project

 

[Hero999]

What sort of 8-bit number are you subtracting?

If it's two's complement then you could negate it then add it.

 

[iloveelectronic]

Sorry it's a 4 bit subtractor not 8...