Answered: household has an alarm system to detect…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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A household has an alarm system to detect movement in their garden and windows opening during the night. A visual alarm (red light) is turned on if there is movement in the garden or any of the windows is opened. A sound alarm (siren) goes off (makes noise) if there is movement in the garden and any of the windows is opened. A light sensor is used to detect if it is night or day time. The whole system is activated with one master switch. The system only works when the switch is closed.

Create a schematic diagram in LTspice to implement the truth table.

Inputs
Outputs
D
C
B
A.
Light
Siren
1.
1.
1.
1.
1.
1.
1.
1
1
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1
1
1
1
1.
1
1.
1.
1.
1.
1.
1.
1.
1.

Inputs
A = Movement Sensor (0 = no movement, 1 = movement present)
B = Window Sensor (0 = no window opened, 1 = any window is opened)
C= Light Sensor (0 = night time, 1 = day time)
D = Master Switch (0 = opened, 1 = closed)
Outputs
Visual Alarm (Red Light) = X (0 = OFF, 1 = ON)
Sound Alarm = Y (0 = no noise, 1 = makes noise)

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