(b) Mr. jojo, lives in a four-flat house, the conditions of the lighting system wa very bad and he needs help. He wants the design to be as follows, a combinational circuit that controls the ceiling lights in my downstairs hallway, which has three wall switches: one at the front door (A), one at the back door (B) and one in the family room (C). When I walk in the front door, the ceiling lights are off, the A switch is ON and both the B and C switches are OFF, From these initial conditions, changing the position of any switch should turn the lights on; changing the position of any switch (again) should turn the lights off,

(b) Mr. jojo, lives in a four-flat house, the conditions of the lighting system wa very bad and he needs help. He wants the design to be as follows, a combinational circuit that controls the ceiling lights in my downstairs hallway, which has three wall switches: one at the front door (A), one at the back door (B) and one in the family room (C). When I walk in the front door, the ceiling lights are off, the A switch is ON and both the B and C switches are OFF, From these initial conditions, changing the position of any switch should turn the lights on; changing the position of any switch (again) should turn the lights off,

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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a) Light in a two-story building is controlled by two switches. The top switch is labeled Sj and bottom one is labeled S2. When a switch is “ON" the value is “1" and when a switch is “OFF" the value is “0" The light goes "OFF" when both switches are "ON" or both are "OFF". Draw the Truth Table of the lighting system. Write down the logic equation of the system in a SOP form Implement the circuit of the lighting system using the SOP logic equation in (b) using AND-OR gates
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-Design a traffic light controller in which the traffic on an intersection crossing is controlled by a digital circuit using JK Flip-Flops in a synchronous counter. Use traffic signals with red, green and yellow lights on each side of crossing. The lights operate such that red will be on 30 sec. At, the same time, the green light of an adjacent road lights 25 sec followed by the yellow light will be on 5 sec momentarily before the red light goes off. There is a ready timer creating clock pulse of 5 sec per cycle. Design the system by doing the following steps:a) Using block diagram show the plan of circuit and mention the number of JK Flip-Flops that you need.b) Write the truth table of the synchronous counter you need for this design.c) Make the required K-maps and write the Boolean algebraic functions for each J and K inputs using the K-Maps.d) Draw the circuit for this traffic light controller.
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