Pulsed Duty-Cycle Control to Constant DC (Low State)

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Thread Starter

Jeff Lange

Joined Jan 4, 2012
I've done some research and I came across a few threads here, but I have a somewhat unique situation.

What I have is a duty-cycle controlled DRL system in a car, (I unfortunately do not know the frequency of this signal yet). So what happens is the high-beam bulb (12V 65W), is in one of 3 states: off (0V), on (12V), or DRL (12V pulsed to give approximately 50% light output).

What I need, however, is to turn on a control solenoid when the high beams are on (constant 12V), but I do not want it to see any voltage in the other 2 states (off or DRL). Obviously off is easy enough, but the solenoid would be damaged by the duty-cycle control, so I need it to not be getting any power when the high-beam bulb is in DRL mode.

Can anyone think of any way to do this, relatively simply?

Thanks so much for the help!



Joined Apr 5, 2008

Sorry, we can not help you with the daytime running light system.

I am closing this thread as it violates AAC policy and/or safety issues.

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