## PHYS345 Electricity and Electronics

Hints for 10/19 Assignment

Note that ' is synonymous with the overbar, the Boolean representation for the NOT operation.

Your truth table might start out looking like this:
A  B   A'  C=
AB
D=
A'B
C+D
0 0
0 1
1 0
1 1

Your truth table might start out looking like this:
A  B   C   B'   C'  D=
BC
E=
C'B
F=
B'A
D+E+F   A+B
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1

It would appear that the circuit was incorrectly drawn! Otherwise most of the gates are redundant...
x3  x2   x1   x3  x2 A=
x3'x2'x1
B=
A
A+B
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1

Pick names for the four inputs; suggestions would be H1, F1, H2, and F2, for height and flow, respectively, for the two tanks.

Consider using false (0) to indicate an acceptable sensor reading and true (1) to indicate a reading beyond an accepted level.

"http://www.physics.udel.edu/~watson/phys345/protected/exercises/hints/1019.html"
Last updated Nov. 3, 1999.
Copyright George Watson, Univ. of Delaware, 1999.