savetheclocktower

Using a rotary encoder as a volume control

On my RetroPie machine I wanted a hardware volume knob — the games I play use a handful of emulators, and there's no unified software interface for controlling the volume. The speakers I got for my cabinet are great, but don't have their own hardware volume knob. So with a bunch of googling and trial and error, I figured out what I need to pull this off: a rotary encoder and a daemon that listens for the signals it sends.

Rotary encoder

A rotary encoder is like the standard potentiometer (i.e., analog volume knob) we all know, except (a) you can keep turning it in either direction for as long as you want, and thus (b) it talks to the RPi differently than a potentiometer would.

I picked up this one from Adafruit, but there are plenty others available. This rotary encoder also lets you push the knob in and treats that like a button press, so I figured that would be useful for toggling mute on and off.

andyjack

Installing Net::SSLeay with openssl from homebrew (macOS)

You don't need to do anything fancy other than running cpanm - with the most recent Net::SSLeay things should Just Work.

Updated 2020-Mar-10

I realized that since Net::SSLeay is looking in known places (including homebrew's install locations) for openssl, it means that my instructions that set up environment variables are no longer necessary! The following will install the module:

# openssl 1.0.2d

haasn

Firefox bullshit removal

Updated: Just use qutebrowser (and disable javascript). The web is done for.

DorianRudolph

Copyright (c) 2015, Dorian Rudolph

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all

Minoru

The question: Can I rest my wrists/palms on the wrist/palm rest while typing/using a mouse?

Key

Marks before the source URL indicates the main tone of the source in regard of wrist/palm rests:

[xy]
 ^^

piscisaureus

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = git@github.com:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

ziadoz

Awesome PHP

Awesome PHP has been relocated permanently to its own Github repository. No further updates will made to this gist.

Please open an issue for any new suggestions.