Questions about PSU's and Batteries

Dimazz · 02-May-05, 04:23 PM

Hey guys,
1)I have a PSU that came with my HP machine (plexi case), and it has a propriotory connector on the end, 18 pins in a straight line. I have a new mobo now that has a standard ATX connector. I was just wondering if I tested all the voltages on the HP PSU and got a pinout for the ATX plug and matched all the voltages up, would it work?

2)Does anyoe know what amperage a AAA battery puts out?

3) If a rechargable battery needs 5v at 350mA to charge and I charge it at 5v and 250 or less mA, would it damage the battery or would it just take longer to charge?

Thanks
Dmitri

Cpl Rampage · 02-May-05, 09:48 PM

Quote:

Originally Posted by Dimazz


	Hey guys, 1)I have a PSU that came with my HP machine (plexi case), and it has a propriotory connector on the end, 18 pins in a straight line. I have a new mobo now that has a standard ATX connector. I was just wondering if I tested all the voltages on the HP PSU and got a pinout for the ATX plug and matched all the voltages up, would it work? 2)Does anyoe know what amperage a AAA battery puts out? 3) If a rechargable battery needs 5v at 350mA to charge and I charge it at 5v and 250 or less mA, would it damage the battery or would it just take longer to charge? Thanks Dmitri

1) prolly will work, but it will be a pain to find the power on and power good signals

2) no clue, looked at one, but it did not say

3) it prolly wont damage the battery, but alot of rechargable batterys require different charging rates at different rates of chare, as to not overheat the battery, but as far as this goes, i think it would be fine.

Romeo21779 · 02-May-05, 10:03 PM

I have a 300 watt power supply that I'm not using. I can give it to you for a couple bucks. If you want it just come by and pick it up sometime.

carbongraphite · 02-May-05, 11:23 PM

alkaline typically cant deliver more than 750 ma because of the chemistry. you typically cant suck more than 1 amp from a AA alkaline which is why high draw devices demand a rechargeable or disposable lithium.

if you charge a battery at a lower amperage it will just charge slower. you should use a chargeing circuit with NiCd or NiMh and especially lithium ion/poly. lead acid you just have to watch the voltage. lead acid, NiCd and NiMh can be trickle charged at low amperage by something like a solar panel.
too much too fast will result in battery bulging or lithiums with burn suppling their own oxygen.

JCoyote · 03-May-05, 04:01 AM

Quote:

Originally Posted by Dimazz


	Hey guys, 1)I have a PSU that came with my HP machine (plexi case), and it has a propriotory connector on the end, 18 pins in a straight line. I have a new mobo now that has a standard ATX connector. I was just wondering if I tested all the voltages on the HP PSU and got a pinout for the ATX plug and matched all the voltages up, would it work? Thanks Dmitri

I'd just replace the PSU if i could afford it. I've run into few if any original PSU's in complete systems that were anything but crap.

Dimazz · 03-May-05, 03:24 PM

Quote:

Originally Posted by carbongraphite


	alkaline typically cant deliver more than 750 ma because of the chemistry.

Thanks guys!

Is there any way to lower the amperage of the batteries?

ADD :: I need it to be around 50-60 mA

Cpl Rampage · 03-May-05, 06:22 PM

you dont have to wory about lowering the amperage, what ever you are tryinging to run off the batery, will only use as much amps as it needs.

FunkyFresh · 04-May-05, 09:57 AM

Quote:

Originally Posted by Cpl Rampage


	you dont have to wory about lowering the amperage, what ever you are tryinging to run off the batery, will only use as much amps as it needs.

True that!*

*As long as there's some resistance in the circuit to limit current. Simply hooking up an LED or two to a battery will be a short circuit, meaning no limit on the amperage.

02-May-05, 04:23 PM		#1 (permalink)
Dimazz Sk8-Hoe-r	Questions about PSU's and Batteries Hey guys, 1)I have a PSU that came with my HP machine (plexi case), and it has a propriotory connector on the end, 18 pins in a straight line. I have a new mobo now that has a standard ATX connector. I was just wondering if I tested all the voltages on the HP PSU and got a pinout for the ATX plug and matched all the voltages up, would it work? 2)Does anyoe know what amperage a AAA battery puts out? 3) If a rechargable battery needs 5v at 350mA to charge and I charge it at 5v and 250 or less mA, would it damage the battery or would it just take longer to charge? Thanks Dmitri

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02-May-05, 10:03 PM		#3 (permalink)
Romeo21779 Apex Master Tech	I have a 300 watt power supply that I'm not using. I can give it to you for a couple bucks. If you want it just come by and pick it up sometime.

02-May-05, 11:23 PM		#4 (permalink)
carbongraphite Pow - Hoe playa	alkaline typically cant deliver more than 750 ma because of the chemistry. you typically cant suck more than 1 amp from a AA alkaline which is why high draw devices demand a rechargeable or disposable lithium. if you charge a battery at a lower amperage it will just charge slower. you should use a chargeing circuit with NiCd or NiMh and especially lithium ion/poly. lead acid you just have to watch the voltage. lead acid, NiCd and NiMh can be trickle charged at low amperage by something like a solar panel. too much too fast will result in battery bulging or lithiums with burn suppling their own oxygen.

03-May-05, 06:22 PM		#7 (permalink)
Cpl Rampage Apex Tech Fanatic Supreme	you dont have to wory about lowering the amperage, what ever you are tryinging to run off the batery, will only use as much amps as it needs.