Rotary volume control for the Raspberry Pi

If you have checked out my previous post, you know I want to create a clock radio powered by the Raspberry Pi with the audio coming out of a JustBoom AMP Zero pHAT.  One of the things that I thought would be quite handy (probably necessary) would be volume control.  Ideally that would be some kind of hardware rotation controller, but looking around online on how one might control the JustBoom amp with a rotary encoder really only brought back results regarding full OS solutions such as Moode Audio.

As it turns out, controlling the volume for the JustBoom when using just Raspbian is actually pretty simple.
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PiZero Clock Radio – Part 1

Long story short; I have a clock radio and it can just about play something from the radio and wake me up in the morning. But if the power goes out it never remembers the time or what any of the radio stations were, and it completely lacks the ability to auto-seek for stations (and I can never remember what the stations numbers are either which is why only one is ever reprogrammed in). As a result, I’ve had it in the back of my mind to build a replacement using my Pi Zero and now that I have a couple extra bits of hardware I thought I’d make a stab at starting the build.

So this is part one of the build process. Or, as I like to title it; Part “I’ve just got some neat hardware so let’s muck about and see if I can get it to do anything”.

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