- #1
bradzyc
- 19
- 0
Homework Statement
Hi everyone,
Very new to this forum so please bear with me!
I have an assignment as part of my engineering course that I seem to be struggling with so I'm wondering if I can grab some help.
Basically I have a water tank that feeds three separate processed (A, B, C). When any two of the processes are in operation at the same time, a signal is required to start a pump to maintain the head of water in the tank. I have to design a logic circuit using only NAND gates to meet the requirements. Then devise a logic circuit using only NOR and NOT gates.
Just a quick note also, the NAND gates can only be 2 Input NAND gates and not the 3 Input ones.
Homework Equations
Truth Table for all possible states and the required output
A B C P
0 0 0 0
0 0 1 0
0 1 0 0
1 0 0 0
0 1 1 1
1 0 1 1
1 1 0 1
1 1 1 1
The Attempt at a Solution
I was not present during this lesson due to work requirements so I'm wondering, how would I go about doing this because at the moment, I'm just using trial and error and having to constantly redraw the circuit out and test different activated processed (i.e. A=1, B=0, C=1) until I seem to get the right answer. However, I have not got this yet.If anyone could point me in the right direction or help then it would be much appreciated.
Cheers People!
B