My build progress

Oh, it won’t be long before I am needing more case.


I’m working on something similar.

It’s an RP2040 based board but with 16MB of flash memory and an I2S DAC board.
I’m getting familiar with the RP2030 and CircuitPython while trying to make an LMNC Big Button sequencer with a built-in wav trigger.


Just a few tweaks and this sequencer is ready to build. Here’s its first sound test! Planning to make a PCB for this one. I’m not working particularly fast, I’m more concerned with understanding the circuits than with getting a usable instrument ASAP.


Going through the slightly daunting task of setting up the panel layout for my SSI2130 VCO


I have no idea what this is but it looks incredible


Setting up a glamour shot of my latest 3d printed trinket in context reminds me i’ve actually built a decent amount of stuff since i got started with SDIY half a year ago:

I’ve been focused on learning more than on actual concrete results (I already have a computer with way too many good softsynths when i need to write a song, so i don’t feel the need to get SDIY results fast), but that’s still some good progress, and there’s only a third of all the stuff I’ve built this year in this shot.

Also, I’m working on a PCB version of what it’s on this breadboard (Moritz Klein’s take on the Baby-8, with lots of bells and whistles):


I made a Monotropa 2 (Monotropa II – Reverselandfill) in Kosmo format. I named it Kosmonotropa 2 :slight_smile:
Although it’s an existing schematic, It’s the first project were I designed a PCB myself. So far the only mistake I discovered Is that I reversed the feedback pot.


Rearranged my office for better access to music and noise making stuff. Maybe I will do more with it now that I can get to it more easily!


We have a percussion section.


Looks great !!
There is jack output on the Ti-83… just saying :grin:


I love the differently colored leds on summit! How is the cutout for the slider on the roundhouse? I made it a bit wider because in my first version I had to sand it a little bit.

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Slider works perfectly without any adjustment.


Made the Duck module from @Dud site, untested but should be good (after i finish the power cables off) =)


back in highschool i got my ti-83 to play low quality 8-bit pcm samples.


(Somehow that wasn’t 20 characters.)


Cool ! :duck:
I hope everything will work well, because I had some problems (“strange antenna effect”), but in case the solution is to place D1 (amount pot) closer to the circuit and the other diodes


Ty! doubly fixed it and made it more accurate now =)

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Soldered up a simple white noise and a fuzz when finishing up the Duck module =D
Oh and added a connector to the circle of doom finally =D

Feels good getting back in the groove =)


This simple PCB I designed to fit a CD4070 (quad 2 input XOR), CD4071 (quad 2-input OR) or CD4081 (quad 2 input AND), which are pin compatible.
The input/output signals are visible via some LEDs.

So obviously I made 3 versions: Logic-[OR|AND|XOR]-o-Matic


30 hours print finished!

Printing PETG this transparent requires a perfect control of every variable, a very slow print speed, and even then, it doesn’t look that good. I think long term I will look into cutting polycarbonate to achieve the looks I want.

In the 2nd part of the video, you can see how the bridge of the PCB holder is attempted (warning, unpleasant sounds). I had to tweak settings manually before this part of the print started. Scary, but it still works out in the end. The PCB will be attached with self-locking ties.

Opening the holes for the screws was really difficult, and I broke one of the holes. It’s repairable easily, but the holes being so close to the edge are by far the most annoying thing about the kosmo specification. It’s fine for metal but definitely not for plastic.

This plate will be used for a AS3340 VCO module. Not sure yet about the plans, but looking at what exists, 5 pots and 8 jacks seems about right to make one with all the features. Might have to use an add-on dangly PCB and some point-to-point wiring to fit it all.