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From: steve on 17 Mar 2010 11:12 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
From: Ecnerwal on 17 Mar 2010 11:50 In article <cfb9723a-a6b2-47cd-92e8-c32780de6af2(a)t34g2000prm.googlegroups.com>, steve <kvsteve(a)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
From: David Eather on 17 Mar 2010 16:00 On 18/03/2010 1:50 AM, Ecnerwal wrote: > In article > <cfb9723a-a6b2-47cd-92e8-c32780de6af2(a)t34g2000prm.googlegroups.com>, > steve<kvsteve(a)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.
From: Baron on 17 Mar 2010 18:39
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. |