simple burglar alarm is to be wired up in a house which has two access doors, A and B. Micro switches are used to detect whether the doors are open or closed with a logic level 0 detected when a door is closed and a logic level I transmitted when a door is open. The alarm system can also be activated ON and OFF through a concealed manual switch S. with the system activated; a logic level I is transmitted through switch S. A logic level 0 through switch S indicates that the system is OFF Devise an appropriate Boolean expression to represent the sound of the alarm F when the system is a

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simple burglar alarm is to be wired up in a house which has two access doors, A and B. Micro switches are used to
detect whether the doors are open or closed with a logic level 0 detected when a door is closed and a logic level I
transmitted when a door is open. The alarm system can also be activated ON and OFF through a concealed manual
switch S. with the system activated; a logic level I is transmitted through switch S. A logic level 0 through switch S
indicates that the system is OFF Devise an appropriate Boolean expression to represent the sound of the alarm F
when the system is activated and either, or both, of the doors are opened.

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