My build progress

Envelope-O-Matic (a quattuordecim envelope follower) is coming along nicely. Waiting for some pots and resistors though.

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The phase is considered in the NOBSRINE design.
It is actually a rather dense circuit.
It samples itself with each knob turn, and also uses the energy of the turn to control the amplitude of two plus two triangle oscillators.
It is fun.

I added a voltage starving switch last night and it actually made it infinitely more fun. lol

And yeah - there are holes in the bottom.

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You won’t be laughing when we run out of entropy.

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i try to made a layout for it

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MFOS VCLFO breadboarded. After dealing with a few minor issues it seems fully functional.

Next step is to see if I can get sync input working.

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Built a few minor things today including a mute pedal, a music box module with a slightly repurposed @analogoutput Microkosmos pcb powering it, and a new case. Getting set up to test it all out.

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Music box is brilliant, now it just needs a motorized crank with voltage controlled speed.

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… and then a voltage controlled hole punch module…

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i think it’s come from this vid

with motor

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Very impressive. Love the mute message.
The music box is clever, instead of a motor I’d go clockwork and then you have a clock source with a big key to wind up. :smiley:
Can the paper be taped end to end for a loop?

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Yep! End to end loops work like a charm!

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Fantastic!..

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Im sure you posted something about your nifty breadboard pots’n’plugs (German i think) helpers but can I find it?
Can I get a link?

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Finished my Filter Grr and OBA:

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@Bitnik posted about them apparently on the second day of this forum’s existence:

The jacks boards on the MI site use footprints for jacks that aren’t readily available here, I did an adaptation for Thonkiconns:

(The usual, download the repository, zip the Gerber files, upload to your favorite fabricator.)

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… and generating triggers from the holes …

I though about doing this for booting my retro-computer (I can’t afford a real punched tape reader)…
Totally forgot about it, but now it comes back for synth…
I’ll have to add such a bare music box to my next Aliexpress order :slight_smile:

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Got almost all of the resistors installed in this bad boy.
Just waiting on some 10M’s.

Made a Solar Bug with a 74HC132 IC as a Paper Circuit.

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I’m trying to make an adapter for an existing euro rack module but I have difficulty finding the right parts.

It is difficult to measure the pitch of the pins, but I think they are 1.80 mm (or 0.07 inch) apart.

The pins are closer together than the normal pitch of a vero board.

Does anyone know how these connectors are called?

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I guess they are 2mm apart, that’s the closed “standard” pitch (I know of…).

You can find the male ones in long strips here :


The female, Tayda seems to carry only 4 and 5 pin strips :

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Headers come in many pitches; from Mouser:

(that’s just a few of them)

Did you try measuring the distance between the outermost ones, and dividing by N-1?

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