Wire connection incandescent lamp life extension switch circuit

Published:2011/7/4 0:46:00 Author:John | Keyword: switch, incandescent lamp | From:SeekIC

A wire connection incandescent lamp's life extension switch is shown. As its warm-up time is long, the service life of the bulb E is long. When the switch S is closed, 220V AC only has the negative half-cycle and powers bulb E through the VD1 and S. At this time, it is under the semi-pressure warm-up state. AC’s positive half-cycle charges the capacitor C through the VD2 and R1 and R2 divider until the voltage across C rises to more than 3V. Then the regulator thyristor VS is breakdown to conduct VT. Therefore, the bulb E is under total pressure to light.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/Motor_Control/Wire_connection_incandescent_lamp_life_extension_switch_circuit.html

Print this Page | Comments | Reading(3)