I had a thought of trying to just run a mp3 player set up like this... http://www.jalopyjournal.com/?p=11082 Maybe use the volume knob inside of a gutted radio.
Thats very close to what I am looking at doing. I found out that most amps take 0.2 -5V as an input. My Droid, and most headsets, are around 1V out max. So I need to preamp it up. Right now I am on the hunt for a stereo volume control to replace my mono AM knob. Went to a couple thrift stores tonite (thanks for the idea DDB), but nothing. We have a radio/cb shop in a couple towns over. My buddy is going to go and see if they have anything for sale that they pulled out of a car.
I wish it was 1987 all over again and I would just throw one of these EQs in the car They were the hot thing back in "the day". Everyone had an external eq/amp, LOL
Those old style radios might be too old for the pawn shops, maybe the auto wreckers might have some, if you have any wreckers with older stock. I use to have one, but I'm sure I tossed it out.
Cool project! Not sure if you are into micro-controllers, but Maxim sells a dual channel digital potentiometer (DS1868) that you can use any micro-controller to control. You could use your AM single gang pot as an analog input to your micro and then control the stereo volume digitally. Here is a pretty nice application: http://embedded-lab.com/blog/?p=2967
Thanks for the link. Its been a while since I have worked with micro controllers. If I cant find a suitable pot, I will keep that in mind. It looks very interesting.
Just an update...I FINALLY found an old 2 post FM radio. I ripped the POT out and put it in the AM radio. I painted the needle, Face Plate, inside plate, then put the front all back together. Update page here....be patient as it is pic heavy.
There is something so cool about the looks of an original radio to me. I already have a Kenwood in my Maverick, but I may do something like this in my Mustang since it still has the original am radio.
Well if anyone is still hanging around out the and following this thread...It is done. Thats right, got me an AM stereo mp3 player. Pics are HERE. I have to draw up the schematic and post it yet, but the pics tell most of the story. (be patient, its a pic heavy page and I run the little server out of my place. Dont tell RR)
Thanks! Schematic added.. http://smegnl.medina.oh.us/index.ph...:am-radio-mp3-mod&catid=35:maverick&Itemid=54
