Answer to Question #176160 in Electrical Engineering for Askir

Question #176160

A chemical process is controlled by a logic circuit. The circuit uses three sensors A, B and C, which

switch an alarm, Q = 1, when certain conditions are reached.

Flow rate ≥ 5 litre/second 1

Flow rate < 5 litre/second 0

Temperature ≥ 30 o C 1

Temperature < 30 o C 0

Pressure ≥ 1 atmosphere 1

Pressure < 1 atmosphere 0

(i) Construct a schematic diagram and simulate the operation of the logic circuit using standard logic gates.

(ii) Minimise the logic circuit using a Karnaugh Map, and then construct a schematic diagram, and simulate the operation of the minimised logic circuit, using standard logic gates.

(iii) Use De Morgan’s Theorems to convert the minimized circuit to use only NAND gates.

(iv) Build a prototype of your final circuit and verify that it meets the conditions in the truth table, and then compare the results from theory, simulation and measurement.

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