Light control road lamp automatic control circuit

Published:2011/7/14 23:14:00 Author:Fiona | Keyword: Light control road lamp, automatic control | From:SeekIC

Connected to 220v AC power,the both ends of capacitor C4 will obtain ten 12v DC.At night,photoresistance RG is a high resistance,transistor VTl, v1,v2 are closed.The relay KMl has no power,the contacts 2-3 of KMl are closed.AC relay KM2 works with power.The contacts l-2 ,4-5 of KM2 are closed, light-emitting diode vD3 displays $signal instructions,floodlight H automatically kindle.At dawn,RG is a low resistance,VT1 conducts when it obtains base current,the radiation high potential output makes vT2 saturated conductivity.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/Automatic_Control/Light_control_road_lamp_automatic_control_circuit.html

Print this Page | Comments | Reading(3)