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Problem: Build in car audio system without audio jack output.
Solution: Audio Compact Cassette with integrated A2DP bluetooth to listen music directly from your phone.

Future steps
- build in bluetooth with hands-free function (to receive and answer calls)
- build in Micro sd slot in cassette

Step 1: Collect Your Staff

What we need:
1. Audio Compact Cassette adapter [cost about 1 USD]
2. A2DP Bluetooth receiver with battery  [ cost about 10 USD] finally I take this one from Ebay (print screen from ebay in attached pdf if link is broken or item is moved to archive)

What is important !!!
We can't use components from standard handsfree. Most of them did not have A2DP bluetooth profile, and our phones recognize them as a handsfree not speakers system. In case of android phones there is a solution Btmono app, in case of iphone only for jaliebroken phones.

Step 2: Take Out the Cover and Cut Jack Wire

1. Gently remove covers from your bluetooth receiver, and cut the wire to speaker. 
2. Cut also jack from cassette 

Step 3: Solder Wires and Secure

Now just solder wires from cassete cable and speaker and secure. 

Yous can also remove speaker and put wire inside with small knot to secure connection :)

Step 4: The End !

Now just get things together and test your new Bluetooth cassette in stereo. 

Good luck !
<p>Yes definitely I'm working on the enhancement to put small turbine inside cassette and charge Bluetooth battery. </p>
<p>Have you had any progress on powering the unit using the drive mechanism of the tape player? Not sure why Ion hasn't done that with theirs. </p>
<p>it would be nice to be able to power the blue tooth, so that you could leave the cassette in permenantly</p>
how about adding a small mp3 player to the cassette so that when the cassette it's inserted it holds the player infront of it
because you can't answer calls from an mp3....
<p>great idea!!</p>

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