great install! love how clean it is.
what usb relay did you use?
The project worklog is located here, however i've gone through too many hardware revisions so I decided to just create a new post, listing what I've done.
Computer: MaxData QutePC-3020 (Atom 330 / ION) with 500gb hard drive, 2gb RAM and 802.11n wifi
Power supply: DCDC-USB
Monitor: Lilliput 669GL
Amplifier: TDA7850 with Denoiser
Enclosure: BlackBox v1
Sound Card: GWC USB 5.1 Channel Audo Adapter AA1500
USB Controlled Relay
HD Radio with Mitch cables
Screen installed, hooked up to the unit:
Amp, prepped and ready:
Everything wired together:
Installed and operating:
The reason I needed a USB Controlled Relay is to eliminated amplifier thump. I had to turn on the amp after the sound card is initialized. The way I did it was to wire the amp to the ACC circuit and also put the same ACC line to the Mute pin via USB Relay's NC connect. Basically, the amp turns on as soon as the car is on, but it starts off muted (so no pop). Once Windows boots up, I wrote a service that sends the On command to the relay, so NC connector becomes open, the Mute pin goes low and the amplifier unmutes.
Feel free to ask questions!
P.S. Many thanks to everyone that helped me along with this project, especially SoundMan - he's been following it from page 1 and offered a lot of valuable advice
That is a very nice setup!
Very nice install!
I'm embarrassed when I look at my rig (and my car) after I see all these installs!
Nice setup. Great looking design. Just one question. Hows that amp holding up? I have the same amp but don't k ow how it'll preform
It's been great so far.
The only part that I'm not satisfied with is DCDC-USB. I'm really not sure why I was trying to save a few bucks on a project that cost more than a grand.
Once in a while, when my car idles for a while and I shift to Drive, the computer shuts off. I think there's a dip in the voltage from the alternator and DCDC-USB can't handle it. If I had to do it all over again, I would have gone with Opus.
Amplifier is working A-OK though!
in the 4th picture, you have a cutout at the top of the black box that exposes the control pcb for the lcd screen? what is the cutout for? cooling?