help!!! nor=bcd to 7-segment

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butiki

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I'm a newbie here and i really need assistance from you guys. i dunno if my subject is correct but anyway it is our project. i need it to pass the course...

we are asked to display number 0-9 to a 7-segment display using NOR gates (74LS02, 74LS27... any nor ics) only. it is like the nor equivalent of BCD i think...

So if you plz can you plz help me and give me the circuit.
Thank you so much, i would really appreciate your help
 
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