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Design a control of traffic lights application(PLC) . In this application,   the lights control the flow of traffic in one direction only. a cascading timer circuit accomplishes transition from red to green to amber. The sequence is  Red is on for 30 seconds. While the red light is on a pedestrian light is turned on to allow people to cross the street against traffic.

Design a control of traffic lights application(PLC) . In this application,   the lights control the flow of traffic in one direction only. a cascading timer circuit accomplishes transition from red to green to amber. The sequence is  Red is on for 30 seconds. While the red light is on a pedestrian light is turned on to allow people to cross the street against traffic.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Design a control of traffic lights application(PLC) . In this application,

 

  • the lights control the flow of traffic in one direction only.
  • a cascading timer circuit accomplishes transition from red to green to amber.
  • The sequence is 
  1. Red is on for 30 seconds. While the red light is on a pedestrian light is turned on to allow people to cross the street against traffic.
  2. Green is on for 35 seconds. The pedestrian light is off during this period. 
  3. Amber is on for 5 seconds. The pedestrian light is off during this period.

The sequence then repeats itself

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