I need assistance asap, assignment due in 4 hours. Elevator circuit.

dl324

Joined Mar 30, 2015
13,508
Doesn't an AND + NOT = NAND?
Yes, but the instructions said only three types of gates could be used. If the OP wanted NAND functionality, I interpreted the instructions to require that an AND + NOT be used. The 3 input gate was also disallowed.
 

dl324

Joined Mar 30, 2015
13,508
Limiting the solution to AND/OR with a maximum of 2 inputs took 42 gates; using up to 4 inputs took ~25 gates.
 
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