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CHDK Question

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Offline Vash11779

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CHDK Question
« on: 24 / May / 2011, 13:33:02 »
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i was wondering, i use mostly rechargeable batteries for my SX130is what should i set the Battery Max Voltage and Battery Min voltage or are they fine at the defaults?
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Offline reyalp

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Re: CHDK Question
« Reply #1 on: 24 / May / 2011, 13:55:11 »
Quote from: Vash11779 on 24 / May / 2011, 13:33:02
i was wondering, i use mostly rechargeable batteries for my SX130is what should i set the Battery Max Voltage and Battery Min voltage or are they fine at the defaults?
The only thing they change is the display, so it's entirely up to you.
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Offline Vash11779

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Re: CHDK Question
« Reply #2 on: 24 / May / 2011, 14:47:31 »
oh really ok i thought it was how CHDK determined how much battery power is left thanks!
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Offline reyalp

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Re: CHDK Question
« Reply #3 on: 24 / May / 2011, 17:11:31 »
Quote from: Vash11779 on 24 / May / 2011, 14:47:31
oh really ok i thought it was how CHDK determined how much battery power is left thanks!
CHDK uses the values for the display of how much battery is left (if you choose % or the battery icon). If that display is inaccurate with the default values, then you can try adjusting the limits to more closely match your batteries.
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Offline Vash11779

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Re: CHDK Question
« Reply #4 on: 24 / May / 2011, 18:50:32 »
i use NIMH rechargeable batteries what settings should i set it after reading this http://en.wikipedia.org/wiki/Nickel-metal_hydride_battery

i set the max to 1.45v(1450mv) and min 1.0(1000mv) i was wondering if its what other people use for NIMH batteries
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Offline reyalp

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Re: CHDK Question
« Reply #5 on: 24 / May / 2011, 21:10:10 »
You can change the display to voltage, and check with batteries fresh off of the charger, and again just before the camera shuts down due to low voltage (the canon firmware should start blinking a red battery icon just a little before that)

You may want to set the max slightly lower than "fresh off the charger" level, because that is typically over the nominal "full" voltage and they will drop down to a more reasonable level very quickly.

Note that the voltage is the *total* voltage seen for by the camera, so unless your camera uses 1 AA battery, 1.45 is probably not appropriate!
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Offline Vash11779

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Re: CHDK Question
« Reply #6 on: 24 / May / 2011, 21:23:01 »
it uses two AA  i changed the display to voltage, and found that the batterys i used when fully charge are around 2.7-2.8 volts i however havent messed with the min yet.

I was hoping someone already knew the appropriate settings and would post them here but i'll just take a pair fresh off the charger and run them down to to the min.

only other problem is i have alot of rechargable batterys of diffrent brands, and am really hoping the voltage is roughly the same for all, i dont want have to change the settings per brand.
« Last Edit: 24 / May / 2011, 22:35:31 by Vash11779 »
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Offline SkyWalker9

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Re: CHDK Question
« Reply #7 on: 24 / May / 2011, 23:03:00 »
Quote from: Vash11779 on 24 / May / 2011, 21:23:01
it uses two AA  i changed the display to voltage, and found that the batterys i used when fully charge are around 2.7-2.8 volts i however havent messed with the min yet.

I was hoping someone already knew the appropriate settings and would post them here but i'll just take a pair fresh off the charger and run them down to to the min.

only other problem is i have alot of rechargable batterys of diffrent brands, and am really hoping the voltage is roughly the same for all, i dont want have to change the settings per brand.
@Vash11779

A while ago I wrote a mini-script ("2Batt") to test the number of shots for a set of batteries. The script records/logs the battery highest and lowest levels. You could use the script to test each type of battery you have fairly easy. Here is a link to the mini-script: http://chdk.setepontos.com/index.php?topic=6149.msg62816#msg62816
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Offline Vash11779

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Re: CHDK Question
« Reply #8 on: 25 / May / 2011, 00:54:39 »
Quote from: SkyWalker9 on 24 / May / 2011, 23:03:00
Quote from: Vash11779 on 24 / May / 2011, 21:23:01
it uses two AA  i changed the display to voltage, and found that the batterys i used when fully charge are around 2.7-2.8 volts i however havent messed with the min yet.

I was hoping someone already knew the appropriate settings and would post them here but i'll just take a pair fresh off the charger and run them down to to the min.

only other problem is i have alot of rechargable batterys of diffrent brands, and am really hoping the voltage is roughly the same for all, i dont want have to change the settings per brand.
@Vash11779

A while ago I wrote a mini-script ("2Batt") to test the number of shots for a set of batteries. The script records/logs the battery highest and lowest levels. You could use the script to test each type of battery you have fairly easy. Here is a link to the mini-script: http://chdk.setepontos.com/index.php?topic=6149.msg62816#msg62816

thank you though my batteries are all NIMH type the brands are the only diffrence ill use that though to determine if the brands really make a diff thanks to you both for your help

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