Originally Posted by Tidder
Well, it was worth a shot man, I know it's worked for me and a few others. Now on to greater things. As far as that box goes, can you post a pic? It's hard for me to understand what you're talking about.
As far as this goes, if I unplug my audio out cable from my computer, mine does the same thing with the audio ground grounded. Weird. If I leave it plugged in, but just the computer is off, no noise.Originally Posted by outdidya
Uhh... I'd look around and see if you can get one with a AC ground already built in. If not, I don't think I'd crack that power inverter open, unless you don't care about it at all, and all you want it to do is work in your car.
Is what you have an AC adapter, or auto (DC to DC) adapter?
I think I remember seeing something about an inverter in this thread right?
heed your own adviceOriginally Posted by Tidder
its not the solutionWhat if this is the solution? You guys and your "well uhh... I don't think it's a good idea, but I've never actually done it" will discourage so many people, when this has worked fine for me for years...
again, heed your own advice. if you can't even exlpain why it works then guess what, you dont know the stuff.C'mon now man, leave it to the guys that know this stuff... not the newbs...
i voiced my opinion. NOBODY slammed your answers. you shouldn't get so defensive just because two people don't agree with you.It's one thing to have an opinion, but it's totally something different to have an unresearched answer. Voice your opinion man, that's what forums are for. But don't slam my answers when I KNOW it works. It just doesn't work in all cases.
what do we know anyways, we're newbies, right?
oh, right, it made the problem worse. thanks tidder, aka mr. "omniscient".anywayz, i tried grounding the audio wires, and they help , but that not much. What i also noticed, that when my audio wires were grounded and the computer is off, not pluged in or nothing, and stock hu is still on , i get the buzzing sound, but once i unground them, it goes away.
rebuilding carpc... kinda..
Hey man, here's the deal, I'm always on the lookout for an argument. If you haven't figured that out yet, then shame on you. I love gettin' you guys all wired up and ****ed. Now, regarding your post, I said somewhere that if you don't know what your talking about or haven't tried it youself, then chill. Now, I may not know what I'm talking about, but I've done it myself and worked for me, as others.
C'mon now, read all the post, don't just pick and choose what you want...
I bet you wasted a lot of time on that post...
NOTE: I didnt read all 5 pages, too much personal bashing
The noise you are speaking of is usually caused by varying resistance of grounds across several components and/or the impedence and signal matching. Impedence issues are usually resolved by using decent materials, where decent materials can accept a wide range of signal impedence for matching purposes. What i expect is occuring here is that there is so much more resistance in the grounds of one component. The unit is trying to find the path of least resistance, or grounding itself through the ground wire of the interconnects. grounding the shielding of an interconnect can help in situations where the units power source ground is isolated from the signal ground. You will find several high end amplifiers have circuits to eliminate this problem, or a switch to isolate the power supply ground or run it in a common environment.
So to boil it all down, if you can replace the laptop with a portable mp3 player and there is no whine, yet the laptop provides a whine when powered through the vehicle, it is due to a grounding issue and poor circuit design in the laptop. Personally, I would locate the ground of the laptop battery terminal and attempt to run a cable from that to a common ground. I would bet that fixes the issue. If not, I would suggest trying headphones on the laptop. Let us know if the whine is still there. If you have attached the ground, and the whine is eliminated when using headphones, but then pops back up when plugging into your stereo system, read the top of my post again. You now know you have an issue with grounding or signal impedence matching.
This all comes down to troubleshoting and isolating the component causing the problem.
Then again, maybe i just made that all up....
that sounds good Will. I was just reading about this in another post and was going to leave some info. Good call.
thats also the conclusion i came to, but i cant do nothing about it. The grounding in my car is all ****ed up i guess. There is a grounding point every 10 inches in the car. under the seat, both seats actually , in the center console, the battery terminal, all over the place i tell ya. I dont nno what else to do.
about the inverter, its a auto adapter for incar use of laptop. basically just an adatper that goes into the cig lighter and plugs into the laptop.
so i should leave it alone? dont ground it ur telling me ?
Yeah, I don't think grounding that would do any good. I thought you have an inverter to go from DC to AC. What you have sounds like a dc to dc. I don't think that would be the cause. I don't know though, I have no experience with these, anyone else?
You know I was thinking, have you tried wiring your inverter straight to the battery just to see? That also fixed some of my noise prob. But I have a dc to ac inverter. (those damn opus' are too expensive for me)