Anonymous
19th January 2003, 03:12 PM
This message contains all postings in this thread
dated before January 19th 2003
Subject: Question regarding connector
From: Max
Date: 17 Dec, 2002 19:21:36
On your page you write the following:
> The XDA pinout
Now what I can't figure out is:
* +6V on the car charger-->
Does this mean that the power has to be more than 6 volt (say
12V) or does it mean that it has to be exactly 6 volts?
The reason I want to know this is because I want to connect a
universal car kit (Mr. Handsfree) to my XDA with the
cable/connector of my TOM TOM Navigator.
Through this cable the XDA already gets charged so I don't have
to connect the charging cables of the carkit.
* If I understand your pinout correctly I only have to connect
the speaker(audio-in on carkit) to pin 5 and pin 4 (or pin 2+3)
and the mic (mic-in on carkit) to pin 1 and pin 2. Is this
correct?
* And can I short out Pin 19(CAR_on#) with say Pin 18 (GND) so
the internal mic and speaker turns off when I plug the cable in?
I hope you can answer my questions.
Thank you very much in advance,
Max
Subject: Car-kit and connector
From: XDA-developers
Date: 17 Dec, 2002 19:27:08
Hi Max,
> Now what I can't figure out is:
>
> * +6V on the car charger-->
>
> Does this mean that the power has to be more than 6 volt
> (say 12V) or does it mean that it has to be exactly 6
> volts?
The car adapter on the site has a regulator, and I would stick
to supplying it +6V. There are nice DC/DC convertors which
convert one DC voltage to another with very little annoying loss
(and this little heat).
> * If I understand your pinout correctly I only have to
> connect the speaker(audio-in on carkit) to pin 5 and pin 4
> (or pin 2+3) and the mic (mic-in on carkit) to pin 1 and
> pin 2. Is this correct?
This is correct, given that the audio must not have what's
called a DC-bias, such as would result from powering an electret
microphone. If you measure anything using a DC voltmeter on your
audio wire before connecting it to the XDA, use a small
capacitor (30 pf?) between the audio in wire and the XDA.
> * And can I short out Pin 19(CAR_on#) with say Pin 18
> (GND) so the internal mic and speaker turn off when I
> plug the cable in?
In fact you would have to, because otherwise the external
microphone would not be used as input.
dated before January 19th 2003
Subject: Question regarding connector
From: Max
Date: 17 Dec, 2002 19:21:36
On your page you write the following:
> The XDA pinout
Now what I can't figure out is:
* +6V on the car charger-->
Does this mean that the power has to be more than 6 volt (say
12V) or does it mean that it has to be exactly 6 volts?
The reason I want to know this is because I want to connect a
universal car kit (Mr. Handsfree) to my XDA with the
cable/connector of my TOM TOM Navigator.
Through this cable the XDA already gets charged so I don't have
to connect the charging cables of the carkit.
* If I understand your pinout correctly I only have to connect
the speaker(audio-in on carkit) to pin 5 and pin 4 (or pin 2+3)
and the mic (mic-in on carkit) to pin 1 and pin 2. Is this
correct?
* And can I short out Pin 19(CAR_on#) with say Pin 18 (GND) so
the internal mic and speaker turns off when I plug the cable in?
I hope you can answer my questions.
Thank you very much in advance,
Max
Subject: Car-kit and connector
From: XDA-developers
Date: 17 Dec, 2002 19:27:08
Hi Max,
> Now what I can't figure out is:
>
> * +6V on the car charger-->
>
> Does this mean that the power has to be more than 6 volt
> (say 12V) or does it mean that it has to be exactly 6
> volts?
The car adapter on the site has a regulator, and I would stick
to supplying it +6V. There are nice DC/DC convertors which
convert one DC voltage to another with very little annoying loss
(and this little heat).
> * If I understand your pinout correctly I only have to
> connect the speaker(audio-in on carkit) to pin 5 and pin 4
> (or pin 2+3) and the mic (mic-in on carkit) to pin 1 and
> pin 2. Is this correct?
This is correct, given that the audio must not have what's
called a DC-bias, such as would result from powering an electret
microphone. If you measure anything using a DC voltmeter on your
audio wire before connecting it to the XDA, use a small
capacitor (30 pf?) between the audio in wire and the XDA.
> * And can I short out Pin 19(CAR_on#) with say Pin 18
> (GND) so the internal mic and speaker turn off when I
> plug the cable in?
In fact you would have to, because otherwise the external
microphone would not be used as input.