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More notes on the audio switch post

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Correl Roush 2023-08-31 23:00:53 -04:00
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@ -5174,15 +5174,17 @@ also been an incredibly powerful tool.
:EXPORT_DATE: 2023-06-21
:END:
I've had these speakers for over twenty years, and for most of them the volume
selector has been awful. The speakers themselves are fine, a simple enough pair
of small stereo speakers with an accompanying subwoofer. The issue is the volume
selector, a plastic wheel set in-line with the speaker cable which — when
rotated to all but a few narrow positions — fails to make a solid connection and
leaves at least one of the two speakers cut out. I've put up with it for quite a
while, the positions being good enough and stable enough to enjoy it, but now
that I've got a proper electronics hobby and am far less shy about cutting wires
apart I'm found myself glancing at it thinking it'd make a great new project.
I've had these speakers for over twenty years (since around 2002!), and for most
of them the volume selector has been awful. The speakers themselves are fine, a
simple enough pair of small stereo speakers with an accompanying subwoofer. The
issue is the volume selector, a plastic wheel set in-line with the speaker cable
which — when rotated to all but a few narrow positions — fails to make a solid
connection. Left, right, or both speakers will cut out as the knob is turned, to
the point that only a few spots on the dial actually provide clear sound. I've
put up with it for quite a while, the positions being good enough and stable
enough to enjoy it, but now that I've got a proper electronics hobby and am far
less shy about cutting wires apart I'm found myself glancing at it thinking it'd
make a great new project.
Cutting the wires and unscrewing the case, the dial was revealed to be a very
simple 10kΩ potentiometer. While this could /easily/ be replaced with a newer,
@ -5192,7 +5194,10 @@ turntable right now, but I've got a TV nearby, and it'd certainly be nice to
pipe my computer's audio through it when I feel like it.
** Volume
Knowing I'd want to control the volume digitally, I went looking for a /digital
potentiometer/. I eventually settled on the MCP4231.
** Display
** Inputs
To switch multiple inputs, I ended up choosing the CD052 2-channel switch.
** Remote Control
** Putting it together