Need help to create a BCD to 7-segment decoder using logic gates

I guess I'm a bit puzzled here.  I am creating a decoder 7 segments with AND, NOT and OR the doors, but I seem to have a bit of luck to get the display of numbers 1, 4 and 9 to work.

Any help would be appreciated, thanks.

Spent a little more time before you look at this link:

http://circuitscan.homestead.com/files/digelec/bcdto7seg.htm

Tags: NI Software

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