[sdiy] DIY patch matrix idea

Tom Bugs admin at bugbrand.co.uk
Sat May 21 22:44:19 CEST 2016


Jim -

I think there are others people use, but back when I did some Minijack 
modules I used some from Jalco:

http://www.actionhardware.co.uk/parts-online/index.php?route=product/product&product_id=902



On 21/05/2016 17:35, Jim Patchell wrote:
> 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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>
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