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Is my ground loop solution safe?
Hi,
I have just installed my first car PC (bought through the Mp3car store) and I have problems with the classic alternator whine or ground loop issue.
I have checked and double checked that everything is grounded correctly (even measured the resistance with a mulitmeter) and I still can get rid of the ground loop. The loop is definitly between my car PC and the head unit as I can plug an ipod or laptop running off its own internal battery into the aux in on the head unit and there is no alternator whine.
Anyway, by trial and error I have come up with a solution that "almost" gets rid of the alternator whine . . . . but I'm not sure if it will blow up my car PC. If I ground the ground on the serial port or video RCA output on the rear of my car PC case to the chasis of the car the alternator whine "almost" totally disappears. The only time I can hear it is when I turn the headunit volume up to almost the max and even then it is only just noticable.
Does anyone know if I will damage my car PC by grounding the serial port to the chasis?
Thanks
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