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Subject: Latest mod - CDC to DVD audio relay switch box... Author: sealbeach740 : member since January, 2004 : 7584 posts Posted on: 2005-10-15 20:59:06

Thanks to some very generous help & input from LA-Sean, my wish of having a more consistant switching mechanism for the stereo input to my 7 for the DVD is almost done. What we did (well, honestly, mainly Sean's ideas & help) was route the CDC digital input to a switch box with a relay, along with the analog stereo audio (input to an audio booster, then an A/D converter to get digital like audio to the relay switch box. The relay is set up to default to DVD as the input (with the relay unpowered), then I just have to push an A/B switch (or a rocker, if we can get one to fit nicely on the 16x9 bezel) to transfer to CDC audio.

It works great, & when I'm using the DVD & the navigation at the same time, the nav takes over for verbal directions & the map display if needed, then right back to the DVD (or CDC) audio & DVD video automatically. This also lets my son watch videos in the back seat (with headphones) while my wife & I listen to CDs. All I have left to do is mount the switch up front. Once again, I'm in LA-Seans debt for helping me with the concept & basically building the relay box. I did the install, but that wasn't to difficult to do.


Here's a pic of the inside of the relay box, with RCA's for CDC digital input, DVD digital input & switched digital output:


My way to crowded trunk - including, but not limited to, DVD audio/video outputs, backup camera outputs (1 for the Nav screen, 1 for the rear LCD screen), IR to RF converter for the DVD remote, A/D converter, audio booster, relay switch box, Video in Motion box, 12->9 volt converter for the A/D & more. It's actually more cleaned up now than before!!


And, finally, the 16x9 with the ground for the new switch relay box, waiting for the switch to be mounted. The ground wire runs from the relay box in the trunk up to the dash via the back seat/door sills & behind the glove box, and out between the 16x9 & the dash.


If you've gotten this far, thanks for reading & thanks again to Sean for his patience & expertise!!


Steptronic Sealbeach740
2000 740iS, oxford green/tan 53k - Nav, MKIV, Basslink, clear corners, TV, TFT LCD screen in back, reversed steptronic +/- shift mode,
backup camera, gauge rings, chrome MPars, AIC hi-beams, DRLs, Hoen fogs, quad brake lights, 6 disc DVD changer & ///M pedals.
1995 525i, also oxford green/tan 133k - stock, except for upgraded headlights (much needed!)
2001 RX300 - very stock, very comfortable, very dependable, very boring.....

• Latest mod - CDC to DVD audio relay switch box... (pic) - sealbeach740 2005-10-15 20:59:06 (988 views)
  • Looking good. You're a little 'dremel' work away from finishing everything up. (nt) - LA-Sean 2005-10-17 18:57:32 (111 views)
    • Yeah, a little dremel & some hot glue & super glue away!! (nt) - sealbeach740 2005-10-17 19:37:12 (64 views)
  • WOW! That's a very sophisticated electronics set up for your car. All of us need - HighLine740iL 2005-10-16 10:25:22 (120 views)
    • Thanks. Funny, that idea has been brought up before....(grin) (nt) - sealbeach740 2005-10-16 13:24:03 (103 views)
  • Congradulations Keith. You list of mods is getting longer and longer (nt) - alfred 2005-10-15 22:37:11 (100 views)
    • Thanks, Alfred! The list grows, but this one was more for - sealbeach740 2005-10-15 23:18:06 (105 views)
  • Nice....Just so I get this straight, this was done to obtain digital quailty - Magnum 2005-10-15 21:36:57 (112 views)
    • Well, kinda. I needed digital format to allow switching - sealbeach740 2005-10-15 23:16:15 (127 views)
  • Very nice job! seal, where is the SES unit and champagne chiller ;-)? (nt) - silber98 2005-10-15 21:26:48 (95 views)
    • Thanks, 'T'. No SES (yet) for me, and my champagne - sealbeach740 2005-10-15 21:30:58 (89 views)
  • Also, thanks to Zigor911 for his input & ideas. Sean & I - sealbeach740 2005-10-15 21:07:11 (152 views)
    • Any time! Glad to help (nt) - zigor911 2005-10-15 22:16:28 (86 views)
  • Good job! (nt) - zigor911 2005-10-15 21:02:18 (93 views)
    • Ha! you're quick! I was typing up the 'thanks' for your help when you posted! (nt) - sealbeach740 2005-10-15 21:08:34 (87 views)