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Old Aug 25, 2002, 2:18 PM   #11
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Good enough for me. I obviously can't say anything about long term effect but if Minolta is selling a Li-ion pack which has the same voltage as a fully charged 7.2v NiMH pack I won't be too worried about my camera.
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Old Aug 25, 2002, 5:07 PM   #12
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You can stick one of this panel meter on the battery pack, such as it shows through the clear side of a leather cell phone holder as well.

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Old Aug 25, 2002, 7:45 PM   #13
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Danged if that ain't one fine lookin' gray rectangle. I bet you could even use it as an 18% gray card. :P I'm going out on a limb and assuming there's more to it than that. Can you upload some more clues for us sir?
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Old Aug 25, 2002, 9:05 PM   #14
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I noticed the above link was out of stock from RadioShack, so here's another one:

https://www.jameco.com/Jameco/Products/ProdCT/p034.pdf

PS. The RS one is more suitable because of the input range and is backlit as well... Did you click on the aboe link?

[Edited on 8-26-2002 by NHL]
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Old Aug 25, 2002, 9:46 PM   #15
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Ah, the browser setup I have didn't show that as a link until I passed the mouse over it. I found a Jameco meter with a backlit display, https://www.jameco.com/cgi-bin/ncomm...nbr=501&ctgys=
I can live with requiring an extra battery but the size is a big big for the slim battery. I may stick with a bar graph display as there are plenty of published cirtuits.
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Old Aug 26, 2002, 2:30 AM   #16
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NHL, Padeye ,

Great idea the LCD voltmeter , cheap to , probably making a led array display cost more than that ! thanks NHL and Padeye , seems that Radio-Shack gets competitive now.

May I suggest also an audible low voltage warning ? let say different tunes for different level of voltage ? like "Reveille" for full charge, "Auld Lang Syne" for extreme low ??
That will complete the Cellular Deluxe Kit for the power pack ! LOL


Quote:
Originally posted by amazingthailand
... even though the camera operates on 4.8V internal AA's and says 6V external supply.
amazingthailand,
not as you may think, as we discussed here the D7i allows boot up only if the external power source is over ~~6.1 Volts ( 6 V was ok for D7)
It's not just a direct wiring ( and disconnecting) with the AA batteries connections. So don't even think about a power pack with 4 cells :P
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Old Aug 28, 2002, 11:56 AM   #17
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Default 7i Battery Test

Another interesting data point: 391 pictures on 1 set of GP 1800 mAh, ISO 100 (so the flash has to give "full power")
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Old Aug 28, 2002, 1:35 PM   #18
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How does ISO 100 give a full power flash unless the lens cap is on? When I ran my test I left the flash on manual, full power.

BTW I heard back from a user who said that under load the Li-Ion pack he's using is only 7.2-7.4v. The pack I'm using is higher voltage so I'm still taking a small risk using it. I could ask Minolta what the safe voltage is but I doubt they'd give an answer.
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Old Aug 28, 2002, 4:48 PM   #19
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Did you (not)click on the above link(again)? I guess putting the flash on manual would be better, but he did say the camera was set at ISO-100 in a darkened room!

BTW the 5700's battery grip could go up to 8.4V if 6 alkaline cells is used and the battery pack is only 6V (I know it's apples & oranges), but if you need any comfort...

[Edited on 8-28-2002 by NHL]
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Old Aug 28, 2002, 5:40 PM   #20
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Doesn't make a whit of difference if the room is dark if there's an object to reflect light back to the lens. You won't get maximum flash duration.
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