Question

Four large tanks at a chemical plant contain different liquids being bested. Liquid-level sensors are used to detect whenever the level in thanks A and B rises. Above a predetermined level Temperature sensor in tanks C and D detect when the temperature in these drops below a prescribed temperature limit. Assume that the liquid-level sensor outputs(A and B)are LOW (0) when the level is satisfactory and HIGH(1)when the level is too high. Also, the temperature-sensor outputs (C and D)are LOW(0)when the temperature is satisfactory and HIGH(1)when the temperature is too low. Design a logic circuit that will detect whenever the level in tank A or tank 8 is too high at the same time that temperature in cither tank C or tank D b too low. The following tasks should be performed: a. Give the truth table for the problem h. Simplify the output function F in SOP and POS(Using K-map, simplify further if possible using factoring) c. Draw the logic design for the output function using gates of your choice. d.

Answer 1

TRUTH TABEL:

A    B    C    D    RESULT
---   ---    ---    ---   ------
0    0    0    0    0
0    0    0    1    0
0    0    1    0    0
0    0    1    1    0
0    1    0    0    0
0    1    0    1    1
0    1    1    0    1
0    1    1    1   1
1    0    0    0   0
1    0    0    1    1
1    0    1    0    1
1    0    1    1    1
1    1    0    0    0
1    1    0    1    1
1    1    1    0    1
1    1    1    1    1

Sum Of Product:

AB A B A B Logic Diagram using AND and OR Gate: 召 AND