From e99d24ccae88cef8676bbfd4904910d67955a4a2 Mon Sep 17 00:00:00 2001 From: Correl Date: Thu, 31 Aug 2023 23:00:53 -0400 Subject: [PATCH] More notes on the audio switch post --- blog.org | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) diff --git a/blog.org b/blog.org index 60dfb29..8b37446 100644 --- a/blog.org +++ b/blog.org @@ -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