My build progress

Bpbby, It would have been funny if my brain had been quick enough to make the connection!

1 Like

Ive started my first Kosmo sized module, having gotten frustrated with trying to squeeze everything into Eurorack space constraits. Ive had a bit of reliability issues with 3.5mm jacks too.

Im going a slightly different way in that Im going to use 4mm bannana jacks in my Kosmo modules, as I have a ton of them from another project that never went beyond the design phase.

As for the first module, its a CR78 bass drum clone, I actually made the board about 7 years ago but it was too big to fit into Eurorack.

Ill post some pictures once Ive made more progress with it.

4 Likes


FINALLY I have a pcb with 15 analog inputs and working midi input. Final problem was that I was using a pin that is in the midi driver midi output, as on of the multiplexer control pins. I didn’t even think about midi out as this only uses midi in. I tested multiplexing by itself, it worked. I tested midi by itself, it worked. Enabling both in code, and nothing worked. Debugging is fun.

11 Likes

A two-in-one module. A sawtooth to triangle converter (Moritz Klein) followed by a Lockhart wavefolder (Ken Stone). You can find the stripboard layout in the verified stripboard layouts thread.

7 Likes

I was trying a new class I added to the software I wrote this week for my Stochastic-Melody-Make-O-Matic sequencer which makes it possible to show the position of any of 3 pots (gate duration, gate duration variation and velocity) on a neopixel-ring, while the ring was also being used for other purposes and this worked nicely. You can see it here:

I wonder how others record things like this. My phone’s camera can not really cope with the amount of light that comes from these neopixels. Mind you, they are at almost their lowest brightness. This was filmed with a DSLR which also has difficulty recording this. Or is it me? Maybe I am not using the right settings? Any suggestions?

8 Likes

Dual hi hats module finished. Only used 5 TL074, 1 TL072, 4 vactrols and 1 AS3360 to make this. And it makes
 noise sounds
 a bit extreme to my opinion. The white noise can be shaped by a resonnant LPF or HPF, there an AD enveloppe for both VCA and filter per voice.
Next is the snare. I am saving the kick for the last build.


5 Likes

OOOOOOOOOO! so neat and tidy and beauty pro looking!

2 Likes

Got most of the components soldered, bar a few capacitors and resistors coming in the post this week.

Hoping to start wiring and testing this week.

7 Likes

Only six months later and I had to build another case. My 4th, 60cm x 60cm x20cm.
Someone said this is addictive
 naaaa I don’t think so :crazy_face: :smiling_face_with_three_hearts:


the new one


the whole “performance oriented” ensemble for the entire family


the original in my space

10 Likes

I love the Teenage Engineering and 1u Intellijel tiles just screwed to sheets of plywood. Super practical!

2 Likes

I met Kosmo before Eurorack. That is why i kept some spacing.
I like the pro-modules for their :gem: shinynes and I had mor GAS than time to solder :wink:
I like the wood work, painting and (sometimes) palning too

so much :heart: love, so little time and space


1 Like

I find distortion effects rather underwhelming when applied to the simple waveforms produced by monophonic synthesizers compared to, say, guitars where the signal is much richer in harmonics allowing distortion to work its magic. Still, I wanted some kind of distortion module so I gave this comparator fuzz by Fredrik Lyxzén a go. Ideally you need a signal booster to use it with a guitar, and it sounds very gated still, but its about right on a synthesizer level signal. I found that I had to apply the fuzz after the filter and VCA, preferably with some modulation, to get something interesting on its own, although I imagine that I could feed the output back to a mixer
 :thinking: Time to build a mixer module and find out I guess!

8 Likes

It looks great !!! :heart_eyes:
Have you ever daisy chained all of the pocket operators ?

1 Like

Would love to know more about

and

Screenshot 2023-10-03 at 18.46.57

4 Likes

@mightywombat : the Eurorack modules are just screwed in. for the POs there is a little bit more behind the faceplate. they run on synth power, the units with “P” have a power converter and supply the others with energy which are daisy chained (1:3 ratio). every unit is separatly switchable. the small stereo jacks of the POs are split and extendet into two big mono jacks. the PO itself is unharmed, everything happenes around him

@Bpbby : i never chained all my POs to one large chain. I separated the channels so I can run them in paralell on one multiplied clock pulse and stitch them together later down the pipeline

@BlackDeath :

4 Likes

Maybe use a neutral density filter to reduce the brightness?

What’s the device to the right of the MiniDexed?

1 Like

Thx for the tip. Never heard of a filter like that but I will certainly look into it!

Back from USA and having adjusted to Swedish International Time (SIT) and did a slow start with the Neutron QVCA (one 8-pin smd OPamp in place many more to go), but also have soldered and will paint the panel (my standards) for a dual AD/AR, where I picked up the PCB in USA.
Now on the workbench (my kitchen table) CGS’ drum module and the Bi-N-Tic filter. Got the last components today.
Eventually going to my old job to cut some wooden shelves I bought for a cabinet so I can start assembling my suff.

8 Likes

Not being picky but shouldn’t it be TM (Timbre Modulation) for a filter and not FM.

1 Like