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