Hi Atom,
Glad you caught the acid pun. I prefer trance.
Batteries never leak trance over PCB's though.
A good multimeter will usually give you bad measurements when the
current you're measuring is under a millivolt. The resistance in the
leads and in the current shunt within the meter will drop the reading.
I'll give it a go though.
Mike.
--- In korgpolyex@yahoogroups.com, Atom Smasher <atom@...> wrote:
>
> On Wed, 28 May 2008, korgpolyex800 wrote:
>
> > I will see if I can measure the current but at low current draws the
> > meter may not be entirely accurate. I'll give it a go though.
> ===========
>
> a good digital meter should be able to measure in the uA range.
>
>
> > According to the datasheet, if I take CS1 high or CS2 low before the
> > power supply drops from 5V to battery 3V, then the current draw
will be
> > 2uA (typical) up to 100uA (max). But the datasheet seems a bit non
> > specific about the timing of the chip select lines being at correct
> > levels prior to the supply dropping to 3V.
> ==============
>
> who makes the chips? try calling their tech info number, and you may be
> able to reach a product specialist... then you can ask what factors
> determine the current draw, and how to decrease it.
>
>
> > Zoinky makes a good point though. The button cell most certainly
can be
> > replaced by two AA batteries. I like the button cell because it's
> > guaranteed not to leak all over the insides of your precious synth's.
> ===============
>
> i've seen coin-cells leak... they just have less "juice" than larger
> batteries.
>
>
> > I cringe thinking about the number of Poly's that have been
sitting in
> > storage with batteries slowly decomposing all of the PCB's. I
bought one
> > on ebay specifically because the case, joystick etc was in perfect
> > condition while the insides were completely acid wrecked.
> ================
>
> an acid wreched poly800... you make it sound like that's not good ;)
>
>
>
> --
> ...atom
>
> ________________________
> http://atom.smasher.org/
> 762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
> -------------------------------------------------
>
> "We hang the petty thieves and appoint
> the great ones to public office."
> -- Aesop
>