Design a burglar alarm system using logic devices so if any one of three doors opens, a binary signal will trigger an alarm. Assume the doors are equipped with magnetic switches so a closed door switch provides a 0 signal to your circuit, and an open door provides a 1 signal to your circuit. Assume the alarm activates with a one-level signal.

What will be an ideal response?


OR gates combine the signals from the door switches. Any open door provides a high to the OR gates. The OR output changes from low to high when this happens. This positive transition triggers the fl ip-fl op to store a one. The fl ip-fl op Q output drives the alarm. A switch connected to the flip-flop CLR input will reset the system.

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What will be an ideal response?

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