dc protection and delay circuit

[gev]

Hi,

DC protection (0.8v sens) and delay (max 2 second set) 70ma current consumption (varies according to the relay)

Desing: Ahmed YERLİ

http://www.youtube.com/watch?v=Whxr-lPd1DM

http://320volt.com/gecikmeli-ve-led-ikazli-hoparlor-dc-koruma-devresi/


RS resistor high-voltage limitation 7812 regulator

sample 34v input;
Rs = (34-17) / 0.07 WRs = (34-17) x 0.07
Rs = 243 ohm WRs = 1.2W