Question

Digital Circuits CET 363 Traffic Control Problem Scenario: Intersection of an access road and main road with traffic signal. See figure. Vehicle-detection sensors are placed along lanes C and D (main road) and lanes A and B (access road). These sensor outputs are LOW (0) when no vehicle is present and HIGH (1) when a vehicle is present. The intersection traffic light is to be controlled according to the following 1. The east-west (E-W) traffic light will be green whenever both lanes C and D are occupied 2. The E-W light will be green whenever either lane C or D is occupied but lanes A and B are not both occupied. 3. The north-south (N-S) light will be green whenever both lanes A and B are occupied but lanes C and D are not both occupied The N-S light will be green whenever either lane A or B is occupied while lanes C and D are both vacant. 5. The E-W light will be green when no vehicles are present 4. Using the sensor outputs A, B,C, and D as your circuit inputs, design a logic circuit to control the traffic light. There should be two outputs, E-W and N-S, that go high when the corresponding light is to be green. Obviously, the signal E-W is the inverse of N-S Digital Circuits CET 363 Traffic Control Problem Scenario: Intersection of an access road and main road with traffic signal. See figure. Vehicle-detection sensors are placed along lanes C and D (main road) and lanes A and B (access road). These sensor outputs are LOW (0) when no vehicle is present and HIGH (1) when a vehicle is present. The intersection traffic light is to be controlled according to the following 1. The east-west (E-W) traffic light will be green whenever both lanes C and D are occupied 2. The E-W light will be green whenever either lane C or D is occupied but lanes A and B are not both occupied. 3. The north-south (N-S) light will be green whenever both lanes A and B are occupied but lanes C and D are not both occupied The N-S light will be green whenever either lane A or B is occupied while lanes C and D are both vacant. 5. The E-W light will be green when no vehicles are present 4. Using the sensor outputs A, B,C, and D as your circuit inputs, design a logic circuit to control the traffic light. There should be two outputs, E-W and N-S, that go high when the corresponding light is to be green. Obviously, the signal E-W is the inverse of N-S

Answer 1

Given data: Vehicte detecion &nsors ohe placed alcng lanes c and o Main mad and lanes A and B Caces nad) lhen vehicle i not pre&ent SersoY autput AMl C0) Wlhen Vehicle is present Aensor OUuput There must be two ouputs N-S and E-W; Goes tigh uhen Corexanding ght es Gwen A ,8,c and B and Therepole, theake fouy fnputs cs Scanned with there ahe tuwo outputs CamScanner ; N-S and E-h.

uth Table E-W N-S A 0 O 0 0 0 0 C0 0 0 1 0 0 1 C 0 1 0 CS CamScannel Scanned with O

Ung onauph map få hirmplifiation 01 10 00 BCD ACD AB ALS 0 0 0 6 01 13 10 E-W CD 0 ABCD AB : A+B AB AtB D 00 1 01 S 13 0 10 AtB CD(AtB) B Do- AtB AB CO CS Scanned with CamScanner CO CD -

Answer 2

Is this the correct logic circuit for this problem? This problem was my Final exam last week and I have done with the same circuit.