Date   : Sun, 15 May 2005 16:52:31 +0100
From   : jgh@... (Jonathan Graham Harston)
Subject: Re: Hardware volume control

Richard Hobbis <rhobbis@...> wrote:
> I can hold a soldering iron and can do wires (but not circuit boards) so
> if it's reasonably easy I want to give it a go (Dad lives too far away
> and probaby couldn't hold the soldering iron still enough any more! ;)
> Can anyone provide pointers on how it can be done?
 
Simplest thing would be to put a variable resister in one of the
leads to the speaker, and mount it so that the control sticks out
of the side of the case.
 
If you look inside the Beeb you will see:
 
Speaker+-----------------------***  IDC
       +-----------------------***  Plug
 
Make a cut in one of the wires and extend it to a variable
resistor:
 
Speaker+-----------------------***  IDC
       +-------+   +-----------***  Plug
               |   |
               |   |
    /\/\/\/----+   |
       ^           |
       +-----------+
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
RISC OS Internationalisation - http://mdfs.net/Software/RISCOS