House Alarm System

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A house alarm uses different Logic Gates to decide if the alarm bell needs to sound or not.  The Logic Circuit diagram below shows a simple house alarm ...

HouseAlarmCircuit


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Check your understanding of logic circuits by answering these questions ...

1. What is the first logic gate used in this circuit?

2. What is the second logic gate used in this circuit?

3. If the alarm is switched on (TRUE) and the bedroom sensor has been triggered (TRUE), what will be the output of the alarm circuit?

4. If the alarm is switched on (TRUE) and neither the bedroom sensor or the front room sensor have been triggered (FALSE), what will be the output of the alarm circuit?


5. If the alarm is switched off (FALSE) and both the bedroom sensor and the front room sensor have been triggered (TRUE), what will be the output of the alarm circuit?



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Last modified: Tuesday, 2 March 2021, 10:52 AM