[sdiy] Audio taper pots - shunt resistors and contact resistance

[Matthew Smith]

Quoth David G Dixon at 09/09/12 06:52...
> V2164 in quantities is about $1 per chip, and you get four high-quality VCAs
> per, about 25 cents per VCA.  With this, the pot doesn't need to be anything
> special, since it's just going to be sending DC to the control circuit.
> THAT Corp. dual VCAs are a bit more, but still, it's cheaper than buying
> fancy pots, and you avoid bringing audio to the panel.

<thinking_out_loud>

Be handy to have a hybrid - DCA, in the form of an analogue VCA with an 
on-board DAC to provide the control voltage. I guess the trick would be 
just to make a little board with VCA + DAC that fits a DIP land-pattern. 
Real analogue VCA, with SPI control. If V2164's are cheap in quantity, 
DACs are even more so.

</thinking_out_loud>


-- 
Matthew Smith

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