Hi everybody,

I'd like to share a project I've been working on for the last year. The idea was proposed by Alan and it's a further development of my hidden aux input (http://dmctalk.org/showthread.php?16338). A bluetooth receiver and a microphone were added along with some custom electronics that allows to use Craig's buttons/knobs to control the receiver's functions. No external switches required so there's no impact on car's interior look (as long as you hide a microphone somewhere) while you can play/pause/navigate soundtracks and receive calls without touching the phone. A frequency tuning knob is used to set a bluetooth volume level. Forward LED is lit whenever any sound is played via bluetooth. LED display was forced to read "AUX" letters (this is optional feature). And there's still a wired aux input, in case one wants to play from a bluetoothless device (it's activated by MTL button).
Here's a short video (~35MB) showing how it all works:

https://drive.google.com/file/d/1jPn...ew?usp=sharing

The prototype seen on the video was tested successfully and there's a plan to build second one for Alan (early next year, I guess). I'm just wondering if there would be any broader interest in such an upgrade (I'm aware that there are at least 2 other bluetooth options available around).

Thanks for reading/watching - any feedback is strongly welcomed.