Great addition!!!
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Working on a ratherā¦ big. addition to the PCB Paper Circuit realmā¦
one with 128 ānodesā
A combination of Fourses Tarpterge and Fourses Arpserge along with their āmixing unit and amplification unitā Intersexon.
Rather than go with bananas, this will utilize 4mm Bullet Connectors to retain touchability as well as patchability. 
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I looked up bullet connectors on eBay and I see a lot of items that are functionally banana plugs. Some sources on the internet seem to use the terms interchangeably. Whatās the difference in your experience?
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They work great -
Meng Qi utilized them on his version of the full board Rollz-5 and they work for both touch and patching 
I have used them as ground jacks as well as make custom banana cables with the other ends.
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So the difference is that the jacks project out from the panel and are not insulated? I can see why the latter would work very well for touch sensitive circuits.
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Pretty much the biggest difference (insulation)
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Ive been working on my midi controller this week (been a vacation). There are like 2 pots that are a bit glitchy, but everything technically works. At this point, i have a few things to sort out:
ā¢ What midi CCs i want to assign to each knob/encoder.
ā¢ Write some middleware interface to change up the assignments so i dont have to reprogram the microcontroller each time.
ā¢ Fix the pots, likely either a simple reflow problem, or janky cheapo pots.
ā¢ Implement the interface for the screens. I have tested writing to the screens with a separate project, but it just needs to have an interface between the midi bits and the screen bits.
Here is the device in FL Studio.
MIDI-OX has been really useful to troubleshoot this. I recommend that.
I am already thinking about my next build. I am thinking that encoders are pretty great, but perhaps not worth the real estate they take up. The next build might only have one for menu. Additionally, i think one screen would have been enough. The next go will probably just have a lot of knobs and faders.
The next build will be done via PCB, now that i have a working prototype with a bunch of wires.
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This is really dope, what are you using under the hood?
Iāve got a dream MIDI controller Iād love to build some day, the 8x8 layout of the Launchpad, with all the functionality of a KeyStep Pro, nice clicky buttonsā¦
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I am using a teensy 3.2 microcontroller (for the usb midi implementation), two 8 channel mux for the pots, two SSD1306 i2c LED screens, and 5 rotary encoders.
If you want to use an arduino nano, i did this in the previous version, but you need to use 5 pin MIDI DIN.
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Small return and modifications of old modules.
- Added a Fine Tune potentiometer to my first 2 VCOs (CEM / AS 3340) who didnāt have one
Really essential for easy tuning
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Add 10M R between pin 4 and 5 of CEM/AS3340 on all my 4 VCOs
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And also as i explain here, I had a slight noise leak problem on 2 white noise-based modules and the solution was to physically separate these 2 modules. I inserted another module between the 2 and the problem was solved and I was happy
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Thinking of building something similar but with many rotary encoders and no pots. Iām inspired by the venerable BCR2000. In principle at least you can adjust a rotary-encoded input in real time to provide whatever trade-off between range and precision is appropriate to the needs of the moment (though this potential is not exploited by the Behringer product.)
https://www.behringer.com/product.html?modelCode=P0245
Edit: I suspect I would go for OSC rather than MIDI if only for the versatility of the former.
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A wise man once said: āYou can never have enough VCAsā.
āTrue, trueā, I hear you say.
But I would like to add: āand each rack deserves its own oscilloscopeā.
Because I added a rack, I added another scope, only this time using a multi color display.
More info here.
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Never heard of osc, no idea if it would work with the software I use. I also thought about using nothing but rotary encoders. They all also have buttons, they infinite scroll etc.
However, in practice I find them not worth it. They take up 3 digital pins, and if you go with an io expander, that will enable you to go with more encoders, but itās a bit more difficult to work with than just a simple mux for me.
When using this with my VSTs, Iām finding I prefer the pots for most things. Next prototype will be using the pcb mounted alpha pots, and sliders.
Now that I have a prototype working that I havenāt sat on, I feel more confident moving forward to a more polished version.
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Yay! The first of many! X
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I love that poster !
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Doesnāt work with many DAWs out of the box, like MIDI. Itās supported by LogicPro and Reaper in the DAW field, but in music composition languages like MAX/MSP, Pure Data, CSound and SuperCollider itās very well established. In addition there are gateways between MIDI and OSC but if you started with MIDI you probably wouldnāt have any need to use OSC unless you were designing synths in software. MIDIās limitations would tend to get in the way.
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Iām thinking of using a multiplexer and clock as a parallel to serial converter. The question then is how fast the clock can run on the microcontroller I choose. Iād need two input pins per encoder on the parallel side so a CD4052 (16:1 multiplexer) could multiplex a bank of 8 rotary encoders. A separately polled multiplexer could be used for the push buttons. Alternatively the push buttons could be multiplexed via the same CD4052, reducing the component count but only managing 5 encoders per bank.
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