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Webplayer with Sealed Lead Acid Batteries

New MessageWebplayer with Sealed Lead Acid Batteries (modified 0 times) drleephd
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Sorry to re-post this, But has anyone had any luck running webplayer off batteries?
I want to hook up a Sealed Lead Acid Battery, running at 6vDC. Would that be too much voltage straight off? or do I not need to worry about 1vDC difference? I think the 5A wouldn't be a problem, a good sealed lead acid battery should easily have the juice. I found 7000maH lead acid batteries for $9.00, ( http://www.batterymart.com ) and several other possible batteries as well as well.

The only disadvantage of SLA's is their weight; this 7AH battery tips the scales at 48oz, but
it should do the job. Anyone have any Suggestions, ideas, why this will/won't work before i order the batteries?

07-04-2002 01:31:43

New MessageRE:Webplayer with Sealed Lead Acid Batteries (modified 0 times) sheepdog
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You do not want a deap cycle lead acid in a closed area. They vent.

You want Nicad, or Nihm, or Lithium.

Also, 6 Volts way to much.

Most of the Nics are cutting out due to the PSU spiking to 5.5 as it is.

07-04-2002 01:45:51

New MessageRE:Webplayer with Sealed Lead Acid Batteries (modified 0 times) boosted
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A _Sealed_ Lead Acid Battery will not vent, most UPS use SLA batteries. Sealed means it won't vent. You just have to find a way to drop that 6V down to 5V. I'm thinking about using NiMH packs myself to make it portable. Maybe put it under the motherboard. Fill it all up with NiMH. Of course the weight it going to be an issue. But it's still on the drawing board.

-boosted

07-17-2002 13:36:38

New MessageRE:Webplayer with Sealed Lead Acid Batteries (modified 0 times) mbaha
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there was a site a guy created about his water tight, battery powered, and solar charged webplayer. does anyone still have the address? I have not seen it in a while.

mbaha

hack your own you will love it more
07-18-2002 13:26:23

New MessageRE:Webplayer with Sealed Lead Acid Batteries (modified 1 times) knarf
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I'm the person who made the solar-powered, ruggedized webplayer. I used a 12 V SLA battery in combination with a step-down converter to power the machine. As the power connector on the WP is connected directly to the login on the board, I would be careful about using a 6 V SLA without any regulation. The WP actually needs a little bit more than 5 V to power up, around 5.2 V seems to be enough. As a 6 V SLA can and will actually give up to ca. 7 V, I wouldn't use it directly...

You can find out more on my project on this board (http://www.linux-hacker.net/cgi-bin/UltraBoard/UltraBoard.pl?Action=ShowPost&Board=vwgeneral&Post=489&Idle=0&Sort=0&Order=Descend&Page=0&Session=) or on my website (http://www.unternet.org/~frank/projects/webplayer/ruggedized/)

07-21-2002 05:19:17

New MessageRE:Webplayer with Sealed Lead Acid Batteries (modified 0 times) boosted
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knarf,
That's some mod. How did it do on your trip? Hope the snapshots and sound clips turned out alright. How is the bullet-proof virgin doing now? On the other thread you posted, someone asked about the LC filter you used for the power supply. I'm also interested. Could you let us know how to build one or perhaps buy one at a parts store? (I've learned about LC filters in school, but.... let's not get into that) Since there are no power switch on these, I have to pull the plug to power it down. when plugging them back in, no matter how fast I jam the plug into the wall, there's always a spark. That can't be good. Hopefully adding a LC filter to the power plug inside the webplayer will help.

thanks,
-boosted

07-21-2002 15:26:39

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