labtop charging

[steve]

I'm considering building a adapter for a HP laptop myself, since a new
one is expensive here (in India).

It specifies a 19v requirement.

So would it be possible to use a common battery eliminator, set at say
around 15v.

Steve

 

[Ecnerwal]

In article
<cfb9723a-a6b2-47cd-92e8-c32780de6af2@t34g2000prm.googlegroups.com>,
steve <kvsteve@gmail.com> wrote:

I'm considering building a adapter for a HP laptop myself, since a new
one is expensive here (in India).

It specifies a 19v requirement.

So would it be possible to use a common battery eliminator, set at say
around 15v.

Steve

Not sure why you'd assume that 4V less than specified would be a good
choice.

Perhaps it would work (if the item is designed with lots of slop on the
power input side), probably not. Most adapters run at or above the
specified voltage. The usual problem with most "battery eliminator" type
products is that they can't even get close to the required current for a
laptop. Some can, most cannot.

I just use a common bench power supply set to the specified voltage when
doing this type of thing - or another laptop adapter which has similar
voltage and similar or greater current, with plugs hacked to match.

--
Cats, coffee, chocolate...vices to live by

 

[David Eather]

On 18/03/2010 1:50 AM, Ecnerwal wrote:

In article
cfb9723a-a6b2-47cd-92e8-c32780de6af2@t34g2000prm.googlegroups.com>,
steve<kvsteve@gmail.com> wrote:

I'm considering building a adapter for a HP laptop myself, since a new
one is expensive here (in India).

It specifies a 19v requirement.

So would it be possible to use a common battery eliminator, set at say
around 15v.

Steve

Not sure why you'd assume that 4V less than specified would be a good
choice.

Perhaps it would work (if the item is designed with lots of slop on the
power input side), probably not. Most adapters run at or above the
specified voltage. The usual problem with most "battery eliminator" type
products is that they can't even get close to the required current for a
laptop. Some can, most cannot.

I just use a common bench power supply set to the specified voltage when
doing this type of thing - or another laptop adapter which has similar
voltage and similar or greater current, with plugs hacked to match.

Try these: they cost $8USD - $12USD

http://www.dealextreme.com/details.dx/sku.23839

http://www.dealextreme.com/details.dx/sku.22308

http://www.dealextreme.com/details.dx/sku.25054

http://www.dealextreme.com/details.dx/sku.32004

if none of these fit they also have "universal" models for about $20USD.
The price includes postage and there is no minimum order size. I use
them (both the company and laptop power supplies) they are good.

 

[Baron]

steve Inscribed thus:

I'm considering building a adapter for a HP laptop myself, since a new
one is expensive here (in India).

It specifies a 19v requirement.

So would it be possible to use a common battery eliminator, set at say
around 15v.

Steve

Its worth noting that some manufacturers put a one wire interface into
the PSU/Charger making it difficult to use anything other than an
original PSU.

--
Best Regards:
Baron.