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Electronics => Electronics => Topic started by: Tommy on November 11, 2010, 06:47:32 AM

Title: Voltage Regulate it, or not?
Post by: Tommy on November 11, 2010, 06:47:32 AM

Hi forum!

Quick question(I hope). I'm making a Mule and using a Lenovo S10 net-boot as
it's controller, currently I using it's internal battery to power the net-book. but because
I just added 120Ah the Mule can run longer the then the net-book, I would like to
power the net-book from the Mule's batteries(24Vdc 220Ah), the back of the net-book
list the input voltage at 20Vdc 2Amp. I'v checked online for more information on
the net-book, but can not fine detailed information on the Dc input(like Max/Min Vcc) of
the net-book.

If I had pockets full of cash I'd just try it because I'm sure id'd be fine, I can see with
a 20Vdc input i'd have a least a 36Vdc Max Vcc.

All this is IMO, lacking any PDF information thats all I got.

would you install a Voltage Regulator, or just Wire it up?.

Tommy

Title: Re: Voltage Regulate it, or not?
Post by: billhowl on November 11, 2010, 07:07:44 AM

I will use a switching Voltage Regulator.

Title: Re: Voltage Regulate it, or not?
Post by: knossos on November 11, 2010, 07:24:18 AM

I would probably regulate it.  Cost of regulating it vs the cost of the netbook is probably insignificant.

Title: Re: Voltage Regulate it, or not?
Post by: Soeren on November 11, 2010, 04:04:19 PM

Hi,

Quote from: Tommy on November 11, 2010, 06:47:32 AM

I can see with a 20Vdc input i'd have a least a 36Vdc Max Vcc.

Where do the 36V come from ???

24V battery, Netbook needing 20V/2A - A linear regulator would burn off up to ~8W (while the charging took place), a switcher would reduce this loss quite a bit, but in the scale of things, 8W isn't much, so I'd base it on your personal preference and what stuff you may have already.