[sdiy] DIY patch matrix idea

[sleepy_dog at gmx.de]

ah, and here's a slightly more expensive one with cap:
http://shop.boxtec.ch/mini-self-lock-push-switch-6pin-8x8mm-p-42036.html

Also, should you ever need to shoot rockets off your gear (like Keith 
Emerson, R.I.P.), there you go:
http://shop.boxtec.ch/missile-switch-with-cover-p-40540.html


Steve


Am 21.05.2016 um 20:12 schrieb sleepy_dog at gmx.de:
>
> how about using an array of small switches (no idea what they're 
> called) like those here?
> maybe with 2 sets of contacts, one of which is used to enable a led. 
> But perhaps it's also visible enough which are "on"  (because they are 
> lower) without led.
>
> Mini Self Lock Push Switch 6pin - 7x7mm, Simple and small 7 x 7mm 
> 6-pin 3PST switch for PCB mounting
> http://shop.boxtec.ch/mini-self-lock-push-switch-6pin-7x7mm-p-42038.html
>
> 0.80 CHF pretty much equals 0.80 USD, if you buy 50 pcs, it's only 
> 0.41 / piece. For 8x8=64 that'd be < 27 USD
> Sounds bearable.
>
> Steve
>
>
> Am 21.05.2016 um 18:35 schrieb Jim Patchell:
>> Oren-
>>
>> Struck a nerve with me.  However, so far, I have not been able to 
>> locate PCB mount Vertical 3.5mm stereo phone jacks.  Is this what you 
>> were planning to use?  And if so, could you clue me in to who sells 
>> them?  Mouser, Digikey, Tayda and Small Bear all have come up short.
>>
>> -Jim
>>
>>
>> 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
>>> _______________________________________________
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>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>>
>>
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>