Maybe buying a working original top panel would have been the better option...

BeoMotion wrote:

Maybe buying a working original top panel would have been the better option...

 

Only if I wanted to retain the radio and MP3 features, which I am not. I am fitting my own stuff totally replacing all the B&O electronics.

As I don't want the power button on the top panel, I am wondering if I can integrate it into the antenna.

At rest push down, the unit turns on, connects to a BT source antenna goes up. To turn it off you push the antenna down. As it only goes up an inch or so - I wonder if this will be a good idea? Bit more novel than just a button somewhere.

pinter75 wrote:

BeoMotion wrote:

Maybe buying a working original top panel would have been the better option...

Only if I wanted to retain the radio and MP3 features, which I am not. I am fitting my own stuff totally replacing all the B&O electronics.

What has the top panel to do with the radio and MP3 sources?
It should be possible to handle it with every MCU that has build in ADCs...
It is hard to design an equally nice looking top panel like the original one. 

There is also some basic audio processing done on the original main PCB. 
Replacing this with custom parts will either result in poor sound performance or lots of extra cost and time.  

Maybe repairing the original components and writing some custom FW for the original MCU to talk to a BT module would be better?

BeoMotion wrote:

pinter75 wrote:

BeoMotion wrote:

Maybe buying a working original top panel would have been the better option...

Only if I wanted to retain the radio and MP3 features, which I am not. I am fitting my own stuff totally replacing all the B&O electronics.

What has the top panel to do with the radio and MP3 sources?
It should be possible to handle it with every MCU that has build in ADCs...
It is hard to design an equally nice looking top panel like the original one. 

There is also some basic audio processing done on the original main PCB. 
Replacing this with custom parts will either result in poor sound performance or lots of extra cost and time.  

Maybe repairing the original components and writing some custom FW for the original MCU to talk to a BT module would be better?

 

 

For a start the existing panel has redundant buttons, considering that I have removed the radio feature (I don't listen to FM). This is a simple project to re-use the housing, not a reverse engineering project. When all done it will just go in a cupboard or in the loft along with most my other projects. This is done for fun, rather then purpose. :-)

Okay.

If there are people out there who are thinking about modifying their BS3 and want to keep most of the original functionality:

There is plenty of space available right under the FM tuner board.
It should be possible to install a Raspberry Pi A+ inside without any case modifications.
If you go one step further you can remove the original radio tuner and connect that Raspberry to its control bus.
Unfortunately the FM tuner (TEA5757) uses a custom 3 wire communication protocol that requires bit banging.
It would be necessary to add a separate MCU that emulates the tuner and translates the data into something the Raspberry understands.

This way you could add e.g. webradio or even AirPlay to your BS3 and still keeping the stock UX.   

For me, I don't see any necessity at the moment for doing this. I might change my mind when in a couple of years the analog FM broadcasting is shut down :-)

first , forget my pool english ,

I have repair My Beosound 3

this is the volume control digital to analog ,

this is the panel control 

or you can visit my web page

link

this is final

It is really great that you fixed it! But is there an explanation in english?

On this side of the planet not all people are familiar with chinese language. 😕