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.
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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
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