The traffic light automatic controller circuit in traffic intersection

Published:2011/11/3 1:55:00 Author:May | Keyword: traffic light , automatic controller , traffic intersection | From:SeekIC

The input 8V voltage isregulated by78M05 to offer VDD=+5V power supply voltagefor 555. Whenthe circuitgets power, the trigger pulse delaysby passingIC1 (CD4011) gate circuit and R1, C1,then it isadded to IC2's pin 2 after being differential by C2, R22, then the trigger IC2 outputs high level to be in transient state, and its transistion state timing time depends on K1's position, when delay td=1.1RC6, itsets time in 60s, 45s, 30s. When transient state finishes, IC2's pin 2 is inlow level, it isdifferential through C3, R23 to trigger IC3 and form second level signal-shot delay. This circuit is monitor display part of control circuit. If it is really used to traffic command, it should use control signal to driver solid state relay, then the light bulb works.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/Light_Control/The_traffic_light_automatic_controller_circuit_in_traffic_intersection.html

Print this Page | Comments | Reading(3)