LinkBack URL
About LinkBacks
Reply With Quotethe problem is with the fm modulator, i'm not sure how it fix it but i;m having a similar problem.
Need help..Audio Buzz
Hey all. I need some advice. I've built a mini-itx computer under the passenger seat of my Xterra. Everything works great except for a high-end buzz/whine while playing MP3s. First, let me describe the hardware, then the hookup.
Hardware:
Via mini-itx C3 800mhz board
70w PSU (DC, plugged into cigarette lighter)
Xenarc touch screen VGA monitor mounted on dash
The computer uses a DC power supply, as does the monitor (making it removable to prevent unwanted "borrowing").
The sound is transferred to the factory stereo from the headphone jack to an RCA splitter, through an FM modulator and in through the antenna.
I was getting good signal strength but an annoying whine with this setup, so I added a ground loop isololator thingy. This suppressed some of the noise, but the signal sucks now.
What should I do? Oh, I built the computer itself in a small cardboard box, it's grounded with a wire running down to the body of the car.
any suggestions on where this sound could be coming from? It tends to rise and fall with the tachometer, by the way.
the problem is with the fm modulator, i'm not sure how it fix it but i;m having a similar problem.
-TJ
Smart Playlists Plugin for RoadRunner
CarPC - 05 Acura TL Navi (pics soon)
Retired CarPC - 03 Infiniti Qx4
Debt as of 1/1/05: $34,354.48
Debt as of July 4, 2007: $0.00 explanation
Total spent on wedding so far: $3885.79
Thanks to everyone for your support.
I'M DEBT FREE!!
also ground everything.. inverter/PSU/modulator to the same ground point.
'98 Explorer Sport
http://mp3car.zcentric.com (down atm)
AMD 800mhz 192megs RAM 60gig hard drive 9 inch widescreen VGA
80% done
First problem: 70watt PSU connected to the cig lighter line. Connect it directly to the battery. This is the worst spot for power.
Second problem: RCA splitter, if it is low quality you will get noise.
Third Problem: You grounded the pc with a wire that RUNS the body of the car? I understand this like if you were using a LONG GROUND wire. Keep grounds as short as posible.
Onboard sound? These are prone to problems. Some more notisable than others.
Good luck resolving your problem.
[QUOTE]Originally posted by osirisdon
First problem: 70watt PSU connected to the cig lighter line. Connect it directly to the battery. This is the worst spot for power.
Ok. I'm not too smart 'bout electrical stuff. Can anyone give me a simple idiot's guide to connecting directly to the battery? I have some wire for it, and an in-line fuse thingy, I just need to know where to hook into the 'lectricity.
tap straight off your car battey
battery + ~~> fuse (close as possible to the battery) ~~~> .. run the wire all the way to your power supply.
I typically like to use an inline relay, but thats just me. obviously you should use proper sized terminal rings.
Mine needs to be updated.
Originally posted by samc
tap straight off your car battey
battery + ~~> fuse (close as possible to the battery) ~~~> .. run the wire all the way to your power supply.
I typically like to use an inline relay, but thats just me. obviously you should use proper sized terminal rings.
LoL. What's a terminal ring? Where, close to the battery, do I "tap in"?
You forget, I'm a computer geek...I know nothing about cars, electronics, etcetera.
With the inline fuse, you can place it about 18-24 inches from the battery. It should go like this, from the battery terminal, you will have 18-24 inches of wire then the inline fuse, then you take the wire to where every you want.
Posting Permissions
Bookmarks