Mobenthey / Ciat-Lonbarde (synthmall) thread

[crucFX]

I asked Pugix if he’d be willing to take a crack at the QUANTUSSY Petals I had printed.
I was so excited when they arrived, I had to mount them to their future home to get a visual lol.

Grabbed @barrford ‘s Tetrazzi conversion.
NOBSRINE and Trains at Night as well!

I finished a Mourning Dove earlier today and slapped it into a chinese AM radio kit case (that I could never get working)

ciat-lonbarde Mourning Dove - BIRD - Solar Sounder - BIRD, MONK, TRAIN.

[amycatass]

I have started putting together some paper circuits for the Rollz-5! Don’t have any of the actual components yet, but I will have some pcbs of the pieces I don’t have as well as some other CL pcbs soon. Wish me luck!

[amycatass]

i think i want to add particle noise source, a shift register similar to the man with the red steam, and a mixer, plus some pots and more voltage control. basically i want to make a budget plumbutter that has a little different character…
how do you suggest going about that?

thanks,
AMY

[wheelersounds]

If you want a 50k linear pot as a variable CV source, you connect one outside leg to V+, the other outside leg to GND, and the center leg is your variable voltage which can be soldered to a banana jack.
I snagged this from a google search – this is how you would build a basic mixer, with the “___ output” pins on each potentiometer as banana jacks that you can plug your signals into. This schematic is a little wrong because it says “audio linear” when those are two different things. So if it’s an audio mixer, use a log pot (500kA) or for CV use linear (500kB).
/
Here’s the original Labrolz paper on Synthmall if you didn’t already have it, though these circuits would need to be either redrawn on paper with appropriate component footprints, or someone (you?) could PCB them. I also don’t know enough about PB to say whether PB2 has any significant changes or improvements, so others will likely chime in. I’ve only built a few paper circuits and I’m not super familiar with what others here have made into commercially available PCBs but I’m seeing some incredible stuff, especially recently, so someone may have already done a lot of this work…
One thing to remember, and it comes up a lot here, is that all your circuits need to share common ground. That way, they’re all referencing the same idea of what 0 volts is – if you don’t do that, it can cause a lot of instability.

[amycatass]

Thank you so much
I appreciate the thoughtful and helpful posts here, thanks for replying so quickly!

I will have to study these schematics very closely, they are a bit nonsensical to me at a glance but I bet I can figure it out. Thank you,

AMY

EDIT:
ok yea just looking at the rollz schematics on rollz-gewei manual I’m very lost. If anyone can help me understand them in relation to the original paper circuit, and/or how i can adapt the paper circuit to be more similar to the plumbutter’s rollz, I would greatly appreciate it! Thanks<<
AMY

[barrford]

@crucFX please note that you are the first person to have a PCB made of my tetrassi adaptation, let alone build it!
You are a true pioneer!

[wednesdayayay]

love that solar sounder!

also super cool to see the quantussy petals wow

[crucFX]

This is based on pugix’s stereo mixer for rollz-5.
It works great and is what I used for my rollz-5 build!

(ignore the switches between the board and the 100k’s, those are crossed out lol, they need to be on the other side of the pot.
Here’s a better pic

Here is a schem of a 3-Roll drawn by Pugix

Please note - comparing this schematic to that of the Labrolz Papers, you will have no luck as the Labrolz version is a CV based version with the Arp-Serge Assemblage.

I am awful at drawing schems, but I have made fully functional CV Roolz based on the Labrolz papers.
Here is a schematic to compare against Pugix’s original Rollz-5 3-Roll and the Roolz-Gewei’s 3-Roll

[Notice: the Even Rollz (4) has an LED Driver]
Hopefully this helps ya!

[amycatass]

Omg thank you! This is exactly what I needed help with, thank you!

-AMY

[amycatass]

So what I’m wanting to do is something as close to this as possible with the rollz-gewei schematics. Basically two adjustable rollzer strips, four 2-rollz, the voice section of plumbutter, the snare from man with the red steam, and a 7 channel mixer, stereo. Are there pcbs available to diy something like this or will I have to make these from scratch?

Edit: I assume the circuits for Ultrasound, AVDog and Gongue all changed a lot between Rollz-Gewei and Plumbutter 2?
I’m willing to sacrifice some of the added cv control (though it pains me) if the plumbutters circuits are under wraps.

Edit 2: upon another reading of the rollz-gewei papers, it seems to me that the schematics in them are literally just the schematics for plumbutter. Am I mistaken?

[corpusjonsey]

There are PCBs out there for most of it. Maybe get a Meng Qi rollz 5 and start with that?

[amycatass]

I’ve considered that, but I don’t really like the layout of that particular pcb aesthetically and functionally, and I want lots of cv control like on plumbutter. I do plan to buy a plumbutter in the near future, but I’m itching to diy a modular instrument from scratch.

[cwpotter]

Nice boards! Where do you have them manufactured? Eventually I’ll be ordering my own Tetrazzi but just haven’t had the time to work on it yet. If you have a spare one I’d be interested in buying it.

[crucFX]

I used JLCPCB because they’re cheap and have fast turnaround times!
Sometimes i even end up with extras depending on how they arranged them during the manufacturing lol.
I’d happily send you one of the spare Tetrazzi’s for the cost of shipping - Those I will not “sell” as I did not do the Conversion - that was @barrford 's work

[amycatass]

Tried to write out the AVDog schematic from the Labrolz papers so that I can understand it better. How did I do? Any mistakes?
Edit: I’ve noticed the schematic only has three potentiometers, while the AVDogs on the PB2 have four? The resonance knob seems to be missing…

Thanks,
AMY

[saxotherose]

Is it possible to generate a 9v, MIDO, GND supply using just 9v batteries as a source?

[reallyok]

what software do you use to design the PCBs?

[crucFX]

absolutely.

[crucFX]

KiCAD - But I also utilize a few plug-ins to create my own nets and various other tasks.
I use Inkscape for all silkscreen and graphic design

[saxotherose]

Thank so much the MVP engineer in CL DIY!