555 Refrigerator protector circuit 1

Published:2011/10/18 3:45:00 Author:Ecco | Keyword: 555 , Refrigerator protector | From:SeekIC

The circuit is shown in Figure 13-6, the circuit is based on 555 circuit to form power delay protection circuit. The connection of C1 makes pin 6 be in high level, and pin 3 be in low level, when the supply is turned again after failure, SCR is cut off. C1 charges, so the pin 2 is lower than the trigger time of 1/3 vdd, that is the delay time td. Icon corresponding td parameter is about 6 minutes. Setting to 555, pin 3 outputs high level. SCR turns on, the refrigerator gets power and the working indicator LED is lit.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/555_Circuit/555_Refrigerator_protector_circuit_1.html

Print this Page | Comments | Reading(3)