Re: [Gumstix-users] More power consumption

[Black, M. <Michael.Black@EssexCorp.com>]

Good lord no -- I used a TekPower DVM that has an RS232 port.
Comes with a Data Logger program that records whatever you're measuring
in a CSV file. The graph comes from Excel.

Here's the meter
http://www.amazon.com/Tekpower-Digital-Multimeter-Interface-DT9602R/dp/B
000E2422G
Main reason I got this model was the thermal probe.
There's a cheaper one:
http://www.amazon.com/Tekpower-RS232-Interfaced-Auto-Ranging-Multimeter-
TP4000ZC/dp/B000OPDFLM
But I much prefer the capability you get for $30 more.  Plust the
DT9602R runs on 9V instead of two AA's -- so you'll get more time from
the battery.  I suppose I need to measure itself to determine best bang
for the $$ on batteries though.

___________________
Michael D. Black
Essex
bl...@es...

-----Original Message-----
From: gum...@li...
[mailto:gum...@li...] On Behalf Of pvm
Sent: Thursday, December 06, 2007 7:53 AM
To: gum...@li...
Subject: Re: [Gumstix-users] More power consumption


What kind of setup did you use to do this test in terms of making the
measurements and plotting the graph?  I assume you didn't plot that by
hand...

-Pete


Black, Michael-2 wrote:
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> Another test - this time measuring amps - you can see the amps climb
as
> the voltage drops.
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> This is a Basix 400xm-bt running WinCE with a virtual display.
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> This is with 3 Energizer AA's LR6-AM3's.  You can see the resets start
> at about 12:30
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> So these batteries rate out at about 1500maH - half the rating of the
> Lithiums.
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> But bang for the buck goes to these guys.  And I still need to get a
> capacitor to see it improves the life span of these.
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> I got these batteries for .36 each compared to $3.70 for the Lithium
> ones I tested earlier.
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> So $ per hour ends up being $.086/hr for these, and $.888/hr for the
> Lithiums.
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> Next I'm going to be testing some rechargeables.
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> ___________________
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> Michael D. Black
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> Essex
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> bl...@es...
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