Is there an FM adapter available in a CD format?

No. It is not possible to do that with a CD player.

Yeah, I'm pretty sure that that wouldn't be physically nor technologically even possible.

The solution is to get a PIE adapter or something like that to have a wired input connection.

I was considering buying an external auxiliary input, and then using a headphone wire to connect from my GPSr to the aux input. The problem is that I would only be able to install it in my wife's car ('07 Honda Accord), but not mine ('05 Jeep Grand Cherokee). We tend to drive my car more, especially for long roadtrips. So, I've decided to simply use the external speaker that comes with my GPSr (I have a Street Pilot). Of course, if we're driving in a remote area that reliably has empty stations, we use the FM transmitter that comes with the power adapter.

If the technology allowed an external adapter to be run through the CD player, however, I would definitely buy it!

-Dave

http://www.poi-factory.com/node/17001

There are a few other suggestions here too.

I didn't think an FM Transmitter solution using a special CD was available, but I just had to ask...

Thank you for all your responses.

Regards,

Tailspin

Nüvi 670 & 880
Mac Pro & OS 10.5.4

Unlike the cassette device where there is a recording head that records the audio to the tape loop prior to the vehicle cassette player reading it, the wired aux CD device would need to use a removable-CDRW and write the audio to the CD prior to the read by the vehicle CD player's laser. (incredibly slow compared to magnetic recording).It would also need to have a huge buffer, as this process is not as instant as magnetic tape. The imposed delays with this would make one possibly miss their turns and what not. Also, there is a finite number of R/W cycles that a CDRW can endure before the data gets corrupt and replacement is required.