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<p>Your low tech solution is a pretty great idea. So you'd use
stereo jacks and shorted stereo plugs? Does that mean you'd have
to be careful to only patch one input to an output? Or is there a
clever way around that as well?</p>
<p>--tr</p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 5/21/2016 12:48 PM, Oren Leavitt
wrote:<br>
</div>
<blockquote cite="mid:5740BB7E.9020605@ix.netcom.com" type="cite">Yeah,
the push switches are definitely an idea. I was toying with the
"low tech" jacks/plugs approach as I have a lot of them laying
around.
<br>
<br>
Jim, I was thinking plain old panel mount jacks.
<br>
<br>
I certainly love the electronic switching solutions available
today. It is a far cry from my first crack at a 4x4 matrix using
4016s some years ago.
<br>
<br>
- Oren
<br>
<br>
On 5/21/2016 1:17 PM, <a class="moz-txt-link-abbreviated" href="mailto:sleepy_dog@gmx.de">sleepy_dog@gmx.de</a> wrote:
<br>
<blockquote type="cite">
<br>
ah, and here's a slightly more expensive one with cap:
<br>
<a class="moz-txt-link-freetext" href="http://shop.boxtec.ch/mini-self-lock-push-switch-6pin-8x8mm-p-42036.html">http://shop.boxtec.ch/mini-self-lock-push-switch-6pin-8x8mm-p-42036.html</a>
<br>
<br>
Also, should you ever need to shoot rockets off your gear (like
Keith
<br>
Emerson, R.I.P.), there you go:
<br>
<a class="moz-txt-link-freetext" href="http://shop.boxtec.ch/missile-switch-with-cover-p-40540.html">http://shop.boxtec.ch/missile-switch-with-cover-p-40540.html</a>
<br>
<br>
<br>
Steve
<br>
<br>
<br>
Am 21.05.2016 um 20:12 schrieb <a class="moz-txt-link-abbreviated" href="mailto:sleepy_dog@gmx.de">sleepy_dog@gmx.de</a>:
<br>
<blockquote type="cite">
<br>
how about using an array of small switches (no idea what
they're
<br>
called) like those here?
<br>
maybe with 2 sets of contacts, one of which is used to enable
a led.
<br>
But perhaps it's also visible enough which are "on" (because
they are
<br>
lower) without led.
<br>
<br>
Mini Self Lock Push Switch 6pin - 7x7mm, Simple and small 7 x
7mm
<br>
6-pin 3PST switch for PCB mounting
<br>
<a class="moz-txt-link-freetext" href="http://shop.boxtec.ch/mini-self-lock-push-switch-6pin-7x7mm-p-42038.html">http://shop.boxtec.ch/mini-self-lock-push-switch-6pin-7x7mm-p-42038.html</a>
<br>
<br>
0.80 CHF pretty much equals 0.80 USD, if you buy 50 pcs, it's
only
<br>
0.41 / piece. For 8x8=64 that'd be < 27 USD
<br>
Sounds bearable.
<br>
<br>
Steve
<br>
<br>
<br>
Am 21.05.2016 um 18:35 schrieb Jim Patchell:
<br>
<blockquote type="cite">Oren-
<br>
<br>
Struck a nerve with me. However, so far, I have not been
able to
<br>
locate PCB mount Vertical 3.5mm stereo phone jacks. Is this
what you
<br>
were planning to use? And if so, could you clue me in to
who sells
<br>
them? Mouser, Digikey, Tayda and Small Bear all have come
up short.
<br>
<br>
-Jim
<br>
<br>
<br>
On 5/20/2016 8:09 PM, Oren Leavitt wrote:
<br>
<blockquote type="cite">With sources of ready-made patch
matrix solutions being scarce, I
<br>
have been mulling over ideas for a DIY patch matrix.
<br>
<br>
I am thinking of using 2.5mm or 3.5mm stereo TRS mini
phone jacks
<br>
arranged in a matrix. These can purchased in bulk for
reasonable
<br>
prices. The tips would be wired as "columns" connecting to
a source.
<br>
The rings wired as "rows" connecting to a summing node
input.
<br>
<br>
The plugs would house a standard 100K resistor wired from
the tip
<br>
(source) to the ring (summing node input). Additional
"special"
<br>
plugs can be fitted with smaller or larger resistors for
added gain
<br>
or attenuation, or an AC coupling capacitor.
<br>
<br>
These jacks could even be used as "inserts" for an
external signal
<br>
processor between source and input.
<br>
<br>
- Oren
<br>
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<pre class="moz-signature" cols="72">--
--Tim Ressel
Circuit Abbey
<a class="moz-txt-link-abbreviated" href="mailto:timr@circuitabbey.com">timr@circuitabbey.com</a></pre>
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