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Hi, I have a 12v pulse (on/off) for about 15seconds, there after it stabilezes and stays on 12v.i want it to activate a relay only when the current stays on...and not when it goes on off.how could i accomplise that?any ideas?
Willbe, a capacitor and resistor large enough to give you a 15 second time constant is going to be very temperature sensitive and very inaccurate as far as timing goes.
Okay, the thing is i hooked up a 12v car relay to my car alarm...when the alarm is activated the relay goes on/off for like 8seconds...too be mre accuratly....and then it stays on....all i want is to design sumthing so that when i activate the alarm the relay would stay on......so would a integrator still work?