SIMPLE_PHOTOELECTRIC_LIGHT_CONTROLLER

Published:2009/7/10 2:15:00 Author:May | From:SeekIC

A phototransistor senses daylight. At dusk, it ceases to conduct and R1 biases Q2, activates K1, and switches on the light. At dawn, Q1 starts to conduct, and Q2 is cut off. K1 drops out and the light goes out.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Basic_Circuit/SIMPLE_PHOTOELECTRIC_LIGHT_CONTROLLER.html

Print this Page | Comments | Reading(3)