A greenhouse has an electronic system (block diagram is given below ) which automatically switches ON a heater if the air temperature in the greenhouse drops too low . A manual switch is included so that the automatic system can be switched off . (Hint , The temperature sensor gives a logic -I output when the air temperature is normal and logic 0 when it is too cold ) a. What is meant by 1 and 0 in digital circuit ? b. Name the logic gate X . Why is it used ? c. Name the logic gate Y. d. Construct a truth table of this electronic system by taking A and B as inputs and D as output

A greenhouse has an electronic system (block diagram is given below )

1.	A greenhouse has an electronic system (block diagram is given below ) which automatically switches ON a heater if the air temperature in the greenhouse drops too low . A manual switch is included so that the automatic system can be switched off . (Hint , The temperature sensor gives a logic -I output when the air temperature is normal and logic 0 when it is too cold ) a. What is meant by 1 and 0 in digital circuit ? b. Name the logic gate X . Why is it used ? c. Name the logic gate Y. d. Construct a truth table of this electronic system by taking A and B as inputs and D as output
Answer» Solution :a - 1 means maximum voltage 0-means minimum voltage B. NOT GATE To give 1 voltage at Y C .AND gate d

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