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Old 10-08-2009, 03:14 PM   #3
Kent Walters
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Posts: 79
Karma: 92
Join Date: Sep 2009
Location: Northern California, USA
Device: iRex DR1000S, Astak EZreader (Hanlin V3)
Here, I said:

Quote:
Originally Posted by Kent Walters View Post
... To use the cap sense switch to turn the device ‘on’ requires the circuitry to be always powered up--even while the device is ‘off’--with it’s clock running...

And

On my ‘experimental’ (broken screen) DR I have noticed that, when connecting the battery, the DR behaves exactly the same as when power is applied thru USB, and after being unplugged for a week, the battery was still fully charged; a power switch on the battery would have eliminated power drain while off, whether the drain was caused by the cap sense circuitry, a firmware bug or anything else.

And

Meanwhile, I’m installing a battery door and switch on my good 1000S.
If a full power down can be arranged thru software/firmware (and I don’t know), then curbarthedog’s USB suggestion is excellent, in that it provides no risk to the DR or the warranty. It could be done using a USB power pack, adding the advantage of extended runtime.

This weekend (hopefully) I will void my warranty and install a battery door on my good DR, just because I’m tired of continually charging it. I will also install a switch, but I’m having trouble coming up with a switch design that could be (relativly) easily implemented by others, who I presume do not have the machinery and tooling that I have. My goal is a switch that appears factory installed, and can be installed thru the battery door opening--a challenge, given the case’s design.

At some point warranties will expire, and/or the DR’s battery will reach the end of it’s life, and need replacement, anyway. I don’t know how many owners would want to send their DR’s to iRex; I will guess that iRex will charge something in the $75 to $100 range for a replacement, and likely take about two weeks (just guessing, mind you).

And Shaggy, power drain while ‘off’ is a fact, regardless of it’s cause. The cap sense switches must be powered in order to work, even just to turn the DR 'on.' My unplugged battery held it’s charge for a week, and was still fully charged.

Kent Walters

Last edited by Kent Walters; 10-08-2009 at 03:17 PM.
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