[AVAILABLE] circuit abbey neo mixer

From circuitbending to homebrew stompboxes & synths, keep the DIY spirit alive!

Moderators: Kent, luketeaford, Joe.

Post Reply
User avatar
you will be assimilated
Posts: 2280
Joined: Wed Dec 21, 2011 6:42 pm
Location: Boston

[AVAILABLE] circuit abbey neo mixer

Post by synthcube » Sun Nov 11, 2018 11:26 am

new from circuit abbey! 4X4 matrix mixer with a twist-- its a 4-in, 4-out matrix mixer and Neo Mixers can connect together with the inputs normalled. Because the inputs are normalled you can connect to an input on a downstream module and break the connection from the upstream module. You can have as many modules connected together as you want. You can do things like have 2 LFOs driving the top 2 rows, 2 envelopes driving the bottom 2 rows on the first module, and 2 other envelopes driving the bottom rows on the other module.

40 mA +12V
40 mA -12V
0 mA 5V
35 mm deep

this is another in the new series of circuit abbey kits and modules with aluminum panels. We are offering kits with your choice of 20 black knobs, or 4 each of blue, red, orange and green knobs...

we're offering a special beta launch price on the full kit. Please feel free to use this thread for build examples, questions, feedback etc...


(the apparent scratches on the picture below are on the protective plastic cover on the panel, not the panel itself... we are saying so only because people always ask!)

NeoMixer synthcube kit BOM.pdf
(103.08 KiB) Downloaded 37 times
facebook: https://www.facebook.com/2SynthCube

synthcube webstore www.synthcube.com/cart
music from outer space: www.musicfromouterspace.com
blacet research: www.blacet.com
MOTM DIY Analog Synthesizers: www.motmsynthesizers.com
music from outer space euro smt: www.mfoseuro.com

User avatar
Veteran Wiggler
Posts: 745
Joined: Sun Jun 02, 2013 1:45 am
Location: Vancouver, BC

Post by adnauseam » Sun Nov 11, 2018 1:56 pm

Looks like a lovely replacement for my Doepfer a-138m.

Can you explain a little more about the normality? In my mind I can't quite work out what the description means!

User avatar
Common Wiggler
Posts: 167
Joined: Wed Jan 06, 2016 6:05 pm
Location: US

Post by artilect99 » Mon Nov 19, 2018 1:54 pm

So it's good for Ac and Dc signals?

User avatar
Common Wiggler
Posts: 136
Joined: Fri Dec 12, 2014 7:48 pm
Location: Tugaland

Post by audiohawk » Tue Nov 20, 2018 11:37 am

artilect99 wrote:So it's good for Ac and Dc signals?
Same doubt here... :hmm:

User avatar
Rex Coil 7
Super Deluxe Wiggler
Posts: 7449
Joined: Thu Nov 29, 2012 11:29 am
Location: Captain Of Outer Space

Post by Rex Coil 7 » Tue Nov 20, 2018 12:55 pm

Yea ... c'mon ... more infos!

$39.00 bucks for the panel and PCB ... pfft ... excellent deal.

(dammit! .... this is all I need ... another thing in my backlog box! ... shit!) :hihi:

5U MODULAR NORMALIZING PROJECT https://www.muffwiggler.com/forum/viewt ... highlight=

There are only four fingers .... Never Quit, Die Falling Forward.

User avatar
Common Wiggler
Posts: 167
Joined: Wed Jan 06, 2016 6:05 pm
Location: US

Post by artilect99 » Sat Nov 24, 2018 2:05 pm

I was also wondering if switched jacks could be used to normal the top row to the positive rail in order to provide a voltage offset a la the dopefer matrix mixer.

User avatar
Common Wiggler
Posts: 155
Joined: Mon Jun 18, 2012 6:22 pm
Location: PDX yo

Post by breadman » Sun Dec 16, 2018 11:53 pm

Looks dope! I see a PCB/panel in my future for sure...

Anyone know where to get OG Circuit Abbey-style knobs to match my Gozinta and ADSRjr? :nana:
email: jschnvr@gmail.com
IG: @jackssynthbazaar

User avatar
Wiggling with Experience
Posts: 338
Joined: Fri Nov 27, 2015 12:13 pm
Location: Western Mass.

Post by colossus » Sat Jan 19, 2019 7:28 am

Bump. Anyone know if this works for AC and DC?

User avatar
Super Deluxe Wiggler
Posts: 2089
Joined: Thu Feb 06, 2014 6:08 pm
Location: Florida, USA

Post by fuzzbass » Sat Jan 19, 2019 12:35 pm

colossus wrote:Bump. Anyone know if this works for AC and DC?
Not the expert, but if you look at the board, you will see a couple of clues. For one, there are no decoupling caps in series on the inputs, so DC offsets won't be removed. Also, there are Bi/Uni switches on the outputs so DC offsets can be applied there. These are both features typical of AC/DC compatible mixers.
Wired for weird

User avatar
Veteran Wiggler
Posts: 681
Joined: Sun Nov 03, 2013 10:34 am

Re: [AVAILABLE] circuit abbey neo mixer

Post by deftinwulf » Tue Feb 16, 2021 5:02 pm

Well, not a lot of discussion around this module. Any users want to report on it? I really like Circuit Abbey stuff, just wondering why would someone use this instead of the A-138m? Just to DIY one for less $$$? It looks basically identical in size and features... (Not sure how many people would get more than one to use the cross-module normaling...)

Post Reply

Return to “Music Tech DIY”