So in the process of mulling over this idea of making a custom Eurorack case, I finally decided that I do want to keep one of the Doepfer suitcases with a select few modules as a "performance" system; everything else would go into the custom made case. Hell, I might not even make the custom case and just get that Plan B case that was announced a while back...either way, I'm keeping one Doepfer suitcase as the "performance" system.
So that got me thinking about a controller for it. I don't want to have to use the Doepfer A-190 MIDI to CV converter as that will take up valuable space. I'd also like to have a unique (and better) controller than a shitty little MIDI controller. It's also a perfect opportunity for me to build something myself.
So my first thought was something with a joystick. I had wanted to get one of the Doepfer A-174 Joystick modules, but it always seemed like it would be taking up valuable space. Well, it turns out you can get the bare joysticks from Doepfer, and rigging them up as 0-5v+ attenuators seems relatively simple. Apparently they also come spring loaded (so the stick is always in the center). You can easily tear the springs out and make them free floating as well. Ripping the springs out is irreversible, however, so I thought of getting two joysticks, ripping the springs out of one, and adding a couple of buttons for triggers. Maybe lay it out similar to an old arcade game; I could probably even find the same style buttons. Perfect, this is simple, unique, and in theory, easy for me to put together.
But...it got me to thinking that, at some point, I will undoubtedly need to play something at standard pitches. So I revamped my design...keep the two joysticks, add a 2 octave keyboard, and maybe keep the trigger buttons if necessary (I could always use a keyboard key to trigger). Probably even add mults, and possibly even VCAs directly on the controller rather than take up more of that valuable space in the suitcase.
Well, I can't really find a definitive schematic or anything for taking a regular keyboard (like a fatar replacement, or even ripping the one out of my cheapo m-audio oxygen 8) and converting that to CV.
Does anyone have any leads on making your own CV keyboard? I spent a while googling around, and aside from this item on musicfromouterspace (which might not even be the right thing) I can't find anything.