[sdiy] 3340 oscillator - current limiting resistor equation is wrong?

[Phillip Gallo]

The Current Limiting Resistor's value isn't so eccentric if the supply
voltage was at the +/-18Vdc maximum.

My guess.

p


On Sat, Nov 18, 2017 at 10:44 AM, Tom Wiltshire <tom at electricdruid.net>
wrote:

>
> > On 18 Nov 2017, at 16:20, Florian Anwander <fanwander at mnet-online.de>
> wrote:
> >
> > On 18.11.17 16:17 , Pete Hartman wrote:
> >>
> >> Could it be as simple as the closest E12 value without going over?
> >>
> > 1k would be much closer to 975R than 820R
>
> I agree, and for a current *limiting* resistor, I’d have thought you
> wanted a slightly larger value to be on the safe side, rather than a
> slightly smaller one.
>
> So no-one has ever come across this before?! Seems hard to believe.
>
> I notice both the V3340 and AS3340 data sheets say only “current limiting
> resistor required for supplies greater than -6V” without actually providing
> any equation or committing themselves to a figure!!
>
> Tom
>
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>        Electric Druid
> Synth & Stompbox DIY
> ==================
>
>
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