[sdiy] "Expression Pedal" output protection?

[Mattias Rickardsson]

What are you worried about? :-)
(Smoking your pots?;)

/mr

On 24 September 2011 21:31, Mike Beauchamp <mikebeauchamp at gmail.com> wrote:
> Reading the recent thread on protecting external inputs/outputs made
> me wonder if I should have any sort of protection scheme on my output
> jacks that are intended to go out to expression pedals?
>
> These are stereo 1/4" jacks, intended to be connected to a foot
> controller with a pot in it (usually from 25k - 100k) where the sleeve
> goes to one end of the pot, ring goes to the other, and the tip goes
> to the wiper.
>
> Right now internally I have the sleeve grounded, the ring going to
> +15V through a 22k resistor, and the tip coming back through a 100k
> resistor and into the noninverting pin of an op-amp.
>
>
>
> --
> [mike]
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