Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[summat]

Car: Elite 2.6 facelift, 2001.

I've had the car three years or so, when I first got it there was the remnants of a hands-free kit. This I removed as I didn't want it, need it, and it almost certainly wasn't compatible with my phone.

I've now got a Navman N60i GPS system, and am toying with the idea of hooking this up to provide muting of stereo / playing of Navman audio through car speakers.

Now, take a look at this (800kb JPEG image) taken from the passenger footwell, this was where the hands-free was hooked into...

http://www.summat.co.uk/P1010138.JPG

It shows an 18-pin connector, with three wires snipped...

Red, presumably 12Vdc
Black, presumably Ground
Brown, unknown

And the original wiring going to the connector...

Shielded twin - guessing microphone
twisted-pair brown & blue - function ?
black - another ground?
yellow - function?

Ideally, I'd like to source 12 volts, and route the headphone output from the Navman.

Does anyone have any idea or schematic for the connector?

[TheBoy]

Your navman cannot send the mute signal to the headunit.  There are some adapters to do this, but tend to clip the initial audio, are are ultimately unsuccessful

[summat]

Your navman cannot send the mute signal to the headunit.  There are some adapters to do this, but tend to clip the initial audio, are are ultimately unsuccessful

Bah, stop being a defeatist!, a simple analogue delay could be provided (1/2 sec should do)

(Hmmm, this is starting to sound more of a project than I'd hoped for for travelling to France in 4 days time.... but, digital delay line, VoX circuit on input, still could be done... where'd I leave my soldering iron)

Sigh!, a sign of the times, 20 years ago this sort of stuff would be common place in kit form, now there's bugger all in the usual suspects (Maplin kits, ebay, etc)

[TheBoy]

Your navman cannot send the mute signal to the headunit.  There are some adapters to do this, but tend to clip the initial audio, are are ultimately unsuccessful

Bah, stop being a defeatist!, a simple analogue delay could be provided (1/2 sec should do)

(Hmmm, this is starting to sound more of a project than I'd hoped for for travelling to France in 4 days time.... but, digital delay line, VoX circuit on input, still could be done... where'd I leave my soldering iron)

Sigh!, a sign of the times, 20 years ago this sort of stuff would be common place in kit form, now there's bugger all in the usual suspects (Maplin kits, ebay, etc)

I remember a kit (Brodit?) about 3 yrs ago.  I think 1/2s delay is too long, esp for handheld satnavs that leave until last minute anyway.  I seem to recall the solution for that particular kit was a new set of tomtom voices that had a short beep, small delay, then instruction.

Defeatist? No. But I simply don't think its worth the effort

[summat]

Your navman cannot send the mute signal to the headunit.  There are some adapters to do this, but tend to clip the initial audio, are are ultimately unsuccessful

Bah, stop being a defeatist!, a simple analogue delay could be provided (1/2 sec should do)

(Hmmm, this is starting to sound more of a project than I'd hoped for for travelling to France in 4 days time.... but, digital delay line, VoX circuit on input, still could be done... where'd I leave my soldering iron)

Sigh!, a sign of the times, 20 years ago this sort of stuff would be common place in kit form, now there's bugger all in the usual suspects (Maplin kits, ebay, etc)

I remember a kit (Brodit?) about 3 yrs ago.  I think 1/2s delay is too long, esp for handheld satnavs that leave until last minute anyway.  I seem to recall the solution for that particular kit was a new set of tomtom voices that had a short beep, small delay, then instruction.

Defeatist? No. But I simply don't think its worth the effort

Okay, threw together a couple of Maplin kits - a pre-amp and a monostable timer, worked fine until I fired the engine up, then the noise kicked in and threw the audio into constant "MESSAGE".

Sigh, getting bored of this, maybe you're right, too much effort for too little gain.

[zirk]

Is the MESSAGE bit coming from your Traffic Master when you start the Car?

Try dicounecting or unpluging the TM.

[TheBoy]

Is the MESSAGE bit coming from your Traffic Master when you start the Car?

Try dicounecting or unpluging the TM.

No, more likely to be coming from home made mute interface

[summat]

Indeed, and agreed.

To be honest, the mute circuit wasn't doing too bad, and I think the miggy / CR2006 switches probably fast enough that there's no need for a delay-line. That was my thought before trying a test-drive when I found that the electrical noise in the car basially fubar'd the system.

As the wife says... there's signposts all the way to Bournmouth.

[TheBoy]

Indeed, and agreed.

To be honest, the mute circuit wasn't doing too bad, and I think the miggy / CR2006 switches probably fast enough that there's no need for a delay-line. That was my thought before trying a test-drive when I found that the electrical noise in the car basially fubar'd the system.

As the wife says... there's signposts all the way to Bournmouth.

I did look at something similar for my iPaq (which are quieter than dedicated tomtom/navman/garmin units), and I would say borderline loud enough if you're having a bit of a disco. Standalone should be loud enough.

I sort of got it working with clipping, but then ultimately decided to fill the ipaq with MP3s, and run media player and tomtom simultaneously and use a cassette adapter.  That works well.