Mini-Modules : Minimoog DIY clone on its way.

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jdelgoulet
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Mini-Modules : Minimoog DIY clone on its way.

Post by jdelgoulet » Tue Dec 02, 2014 8:11 am

PCB, rare parts and Panel kits available here : https://guinguin-instruments.ecwid.com/

Build guide with BOM on github : https://guinguin-instruments.github.io/MME/

Hello everyone !

My name is Julien Delgoulet, I'm a synth DIY passionate from a little town in France called Brive-La-gaillarde. I usually spend my time lurking on muff, matrixsynth , electro-music.com when I'm not repairing,
moding or designing synth related circuits.
For quite a long time, I dream to own a Minimoog but never had the cash to buy one ...
About a year ago, a friend of mine get one and, after playing a few times with it, I decided to give it a go. (By that time, I did not know that this project will fill all my nights and week-ends ... fortunatly I have a
wonderfull wife :love: )
The initial target was to make an exact replica but finally ends up with what I call "Mini-modules" (Think ARP like sub-modules for Filter, VCO etc) for any format : eurorack / Moog 5U, you name it. Also, they could fit behind a "real minimoog sized panel".

All the design are exact replica of the Minimoog rev 2.0 (the one based on CA3046 expo converters) and are all using thru-whole components (excepted a few components that only exist in SMD packages)

So, let me introduce you the idea of "Mini-modules" and the control boards that actually "activate" them.

There will be 6 "Mini-modules":

- VCO
- VCA/Preamp
- VCF
- VCF Env
- VCA Env
- Noise/mod-mix/glide

There will be also 7 "Controller boards" :
- One for each mini-module (so you get an eurorack version of each for example).
- Another, my favorite one, which is 60HP eurorack version where 3VCOs, VCF etc plug into. ( I choose 60 HP so that if you have a 84HP case, you still have some room for a real LFO, a midi/CV interface etc)


At the moment, everything works great, I'm finalizing the "Mini-modules" and the 60 HP Controller Board to hold them.
To give you an idea of the progress made so far , here are some pictures of old prototypes and "Mini-modules" eagle boards. More to come in a few days...

As you might except, this will be a DIY project and I will propose PCBs, BOMs and schematics so that "everyone" can build his own Mini ;-)

I'm so thrilled to expose this project to you guys ,particularly on muff (where I've been more than a lurker and not very helpfull to the communtiy) and
hope you are excited as I am about this project now it is not "secret" anymore :party:

Julien


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Last edited by jdelgoulet on Thu Jul 19, 2018 11:29 pm, edited 4 times in total.

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Starspawn
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Post by Starspawn » Tue Dec 02, 2014 8:21 am

Very nice!
Whats the rare parts count like?

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horstronic
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Post by horstronic » Tue Dec 02, 2014 8:23 am

Wow, that's a big project! You must have spent a lot of time with it.
As you say these are exact replicas: Are there any hard to find parts in it?
That would probably scare away a lot of people.

Nice one, keep it up :tu:

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horstronic
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Post by horstronic » Tue Dec 02, 2014 8:24 am

2 minutes to late :hihi:

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ablearcher
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Post by ablearcher » Tue Dec 02, 2014 8:35 am

Whole minimoog in 60 hp? That is tight! Can you still wiggle on that? Also, impressive! Can't wait to hear the results.

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jdelgoulet
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Post by jdelgoulet » Tue Dec 02, 2014 8:39 am

Rare parts are mainly 2N4058/2N4402 which could be replaced if one does not care about "an exact replica". During development, I tried replacement parts and, to my ear, there was no difference.
E402 has been replaced, like on some Minimoog series, with 2N3954.
Also, TIS97 are hard to find parts but I have a very, very nice popular replacement part which is, on paper (datasheet) and to my hears, the same ;-)

I might offer "rare parts" packages or have someone deal with that for me.
At the moment, the target is : finish the mini-modules, the 60HP board and give you a taste of how it sounds.

PS : The idea of doing Mini-Modules was also a way for DIYers to easily debug and get help from others to track down what is wrong in a specific board.
A Mini for everyone ! :nana: :bananaguitar:

nicoodiy
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Post by nicoodiy » Tue Dec 02, 2014 9:18 am

Un Français!!
As you might except, this will be a DIY project and I will propose PCBs, BOMs and schematics so that "everyone" can build his own Mini ;-)
Thanks to you for your open-source project!! :yay:

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jdelgoulet
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Post by jdelgoulet » Tue Dec 02, 2014 9:25 am

ablearcher wrote:Whole minimoog in 60 hp? That is tight! Can you still wiggle on that? Also, impressive! Can't wait to hear the results.
Yes it is but not that bad actually. Spacing between pots, without knobs, is about 3 cm (1.15 inch).

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jdelgoulet
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Post by jdelgoulet » Tue Dec 02, 2014 9:29 am

And you have more options like variable PW and PWM inputs (don't know why this was not "standard" back in the days), dedicated CV in for each VCO (crazy modulations or paraphonic 3 voices Mini), buffered ADSs outputs to play with etc

seanpark
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Post by seanpark » Tue Dec 02, 2014 10:49 am

This looks really cool! I've always wanted to build a mini.

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Isaiah
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Post by Isaiah » Tue Dec 02, 2014 11:20 am

Oh, goodness...

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trialanderror
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Post by trialanderror » Tue Dec 02, 2014 11:27 am

That's an impressive and good looking project!
I'll definitely keep an eye on this.

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mush
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Post by mush » Tue Dec 02, 2014 11:33 am

May I say that I love you?!

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Morley
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Post by Morley » Tue Dec 02, 2014 11:34 am

Nice!

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latigid on
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Post by latigid on » Tue Dec 02, 2014 11:38 am

Yeah, but does it sound like a Mini?

:hide:

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Moog$FooL$
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Post by Moog$FooL$ » Tue Dec 02, 2014 11:45 am

nice..... good luck with this.

:tu:
i use to drink & smoke.
that fat cat had to go..... wasn't even mine.

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negativspace
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Post by negativspace » Tue Dec 02, 2014 11:57 am

Definitely interested. :party:

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ThecureForSin
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Post by ThecureForSin » Tue Dec 02, 2014 12:08 pm

You can call me INTERESTED!

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gbiz
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Post by gbiz » Tue Dec 02, 2014 12:08 pm

Wow. Nice work Julien. :yay:

Sparky
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Post by Sparky » Tue Dec 02, 2014 12:21 pm

Wow, this looks good. I'm interested too.

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Isaiah
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Post by Isaiah » Tue Dec 02, 2014 12:24 pm

Are any of the jacks switching?
Just wondering if they could be easily replaced with bananas.

I'm curious to see a labelled image of the 60HP control/switch layout if you have one at all, please.

This is very impressive, by the way.
Thank you for sharing and making your project available.
I fear it might prove too hard to resist!

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jdelgoulet
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Post by jdelgoulet » Tue Dec 02, 2014 1:21 pm

Isaiah wrote:Are any of the jacks switching?
Some of them use the switching mechanism like the PWM individual inputs for each VCO.

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sicpaul
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Post by sicpaul » Tue Dec 02, 2014 1:50 pm

:wow:
Not that i'm too short of projects,
but a Euro modular Mini .... it makes my mouth water!

:love: want, want, want :trampoline:

thanks Julien

spoor
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Post by spoor » Tue Dec 02, 2014 1:57 pm

:tu: Great stuff.

Would really like to build this - I hope someone comes up with some nice panels for this.

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Barcode
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Post by Barcode » Tue Dec 02, 2014 2:24 pm

Wow! This is fantastic. I am very interested! :tu:

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