MP3 player with old radio : one solution .

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The goal of my hack is to simply use a mp3 player on a vintage radio . 
You can find the kit for 100 $  . Mine cost 5$ , the most expensive part is the plastic box .
It wont change any AM mono radio to a Fm stereo  :P 
I m quite a former electronic ing , I know the limitations of my hack . The only good side is it s easy to do for about everyone . Just 3 or 4 wires to solder .
It s an easy , efficient way . Don t ask much for 5  $ .
I made also a nice 4 way active filter ...  With Fenton 6 " , Aerogel 4" and Vifa 1 " titanium tweeters .
Central is a mix 300 -3000 with AOP and 24 db filter .

So I know this has limitations . 
It cost 5 $ when other sell 100 $ for the same thing .

Just enjoy .

Edit : just avoid crossing grounds . This will kill everything .

Edited by nali - Jan/04/2011 at 3:48am

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nali Members Profile Send Private Message Find Members Posts Add to Buddy List Supporter of TheAMCForum Joined: Oct/30/2008 Location: Montreal , Can. Status: Online Points: 841	Post Options Post Reply Quote nali Report Post Thanks(0) Quote Reply Posted: Jan/04/2011 at 3:44am
	The goal of my hack is to simply use a mp3 player on a vintage radio . You can find the kit for 100 $ . Mine cost 5$ , the most expensive part is the plastic box . It wont change any AM mono radio to a Fm stereo :P I m quite a former electronic ing , I know the limitations of my hack . The only good side is it s easy to do for about everyone . Just 3 or 4 wires to solder . It s an easy , efficient way . Don t ask much for 5 $ . I made also a nice 4 way active filter ... With Fenton 6 " , Aerogel 4" and Vifa 1 " titanium tweeters . Central is a mix 300 -3000 with AOP and 24 db filter . So I know this has limitations . It cost 5 $ when other sell 100 $ for the same thing . Just enjoy . Edit : just avoid crossing grounds . This will kill everything . Edited by nali - Jan/04/2011 at 3:48am
	66 Ambassador 232 Supercharged in project Olds Delta 88 1979 Buick 38 Coupé .

ronilevi Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Fan Joined: Dec/29/2010 Location: Los Angeles Status: Offline Points: 3	Post Options Post Reply Quote ronilevi Report Post Thanks(0) Quote Reply Posted: Feb/23/2011 at 2:55pm
	Hi again all! I just wanted to share my success with this hack and let you guys know that it works really well for a $1 hack. I had to recap my radio to get it functioning at first but once that was done, I was able to get this going really quickly. I have only recorded a quick video of it in action (which I will post here) but I am working on documenting it (and making it a more permanent solution) and then posting it to instructables for more people to enjoy. Thanks nali for posting this topic and MUCH thanks to gryzynx for clarifying all the murky and unclear points in applying this.

nali Members Profile Send Private Message Find Members Posts Add to Buddy List Supporter of TheAMCForum Joined: Oct/30/2008 Location: Montreal , Can. Status: Online Points: 841	Post Options Post Reply Quote nali Report Post Thanks(0) Quote Reply Posted: Feb/23/2011 at 9:35pm
	Of course it works :) Glad to see someone finally dare cutting and soldering in an old radio to try this . Thanks for the thanks
	66 Ambassador 232 Supercharged in project Olds Delta 88 1979 Buick 38 Coupé .

nali Members Profile Send Private Message Find Members Posts Add to Buddy List Supporter of TheAMCForum Joined: Oct/30/2008 Location: Montreal , Can. Status: Online Points: 841	Post Options Post Reply Quote nali Report Post Thanks(0) Quote Reply Posted: Jun/30/2011 at 4:10am
	As I help a member making the modification , I read this tread again and will add a few modifications . Refering to post from ronilevi : Yes , a condensor will change the frequency response . It will work like a low pass filter . The cut off ( not sure it s the right word ), with 220 ohm and 0.05 uF , will be a 6dB filter at about 15000 Hz . So I think Gryzynx made a mistake :) A 33uF will give a 21 Hz low pass filter , it s a common value and will be better . As Gryzynx said , a condensor on the "hot" wire won t help while for ground issues . But a condensor on the ground wire will . It has to be 2x the value of the ones on the hot wire . So let s say a 68 uF , with 220 ohms resistor . So now you can plug the mp3 player on a charger safelly while pluging it on the radio . For RC filters , see http://sim.okawa-denshi.jp/en/CRtool.php
	66 Ambassador 232 Supercharged in project Olds Delta 88 1979 Buick 38 Coupé .