[sdiy] DIY patch matrix idea

Ģirts Ozoliņš ggg at fgi.lv
Sat May 21 13:28:53 CEST 2016

Or here’s a DIY project from Alain:


Only thing - make sure if you are ok just with having switch matrix vs
mixing matrix.


Be well!



Erica Synths


From: Synth-diy [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of
Tim Ressel
Sent: Saturday, May 21, 2016 10:21 AM
To: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] DIY patch matrix idea


Call me a high tech heretic, but I lean toward using a cross point switch IC
like the ADG2188, and having a matrix of pushbuttons/LEDs for control. That
way you can save and restore configurations.



On 5/20/2016 8:09 PM, Oren Leavitt wrote:

With sources of ready-made patch matrix solutions being scarce, I have been
mulling over ideas for a DIY patch matrix. 

I am thinking of using 2.5mm or 3.5mm stereo TRS mini phone jacks arranged
in a matrix. These can purchased in bulk for reasonable prices. The tips
would be wired as "columns" connecting to a source. The rings wired as
"rows" connecting to a summing node input. 

The plugs would house a standard 100K resistor wired from the tip (source)
to the ring (summing node input). Additional "special" plugs can be fitted
with smaller or larger resistors for added gain or attenuation, or an AC
coupling capacitor. 

These jacks could even be used as "inserts" for an external signal processor
between source and input. 

- Oren 
Synth-diy mailing list 
Synth-diy at dropmix.xs4all.nl <mailto:Synth-diy at dropmix.xs4all.nl>  

--Tim Ressel
Circuit Abbey
timr at circuitabbey.com <mailto:timr at circuitabbey.com> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20160521/8b287071/attachment.htm>

More information about the Synth-diy mailing list