Published:2009/6/17 2:32:00 Author:May | From:SeekIC
The hysteresis of a 555lC can be used to advantage for sensing a drop in light. An LDR or CDS cell with about 2 to 8 k resistance at desired light level should be used.
Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/Relay_Control/DARK_ACTIVATED_RELAY_WITH_HYSTERESIS.html
Print this Page | Comments | Reading(3)
Code: