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Old Aug 15, 2006, 02:11 AM
kenhatch@gmail.com
Guest
n/a Posts
Can I power my Li Poly charger from my computers PSU?

I was wondering if I could attach the aligator clips from my charger to
the 12v power coming from my computers power source? The 12v line is
12v@1.0a so it seems like it should work... but I dont want proceed
without some confirmation...

Old Aug 15, 2006, 02:11 AM
kenhatch@gmail.com
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

hrmm the charger says it needs 2.0 amps for optimal charging, will
1.0amps be bad or just slow?

kenha...@gmail.com wrote:
> I was wondering if I could attach the aligator clips from my charger to
> the 12v power coming from my computers power source? The 12v line is
> 12v@1.0a so it seems like it should work... but I dont want proceed
> without some confirmation...


Old Aug 15, 2006, 02:11 AM
kenhatch@gmail.com
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

I used a spare molex to make a nice little 12v and gnd lead, and it
seams to work just fine.

kenhatch@gmail.com wrote:
> hrmm the charger says it needs 2.0 amps for optimal charging, will
> 1.0amps be bad or just slow?
>
> kenha...@gmail.com wrote:
> > I was wondering if I could attach the aligator clips from my charger to
> > the 12v power coming from my computers power source? The 12v line is
> > 12v@1.0a so it seems like it should work... but I dont want proceed
> > without some confirmation...


Old Aug 15, 2006, 02:11 AM
Gavin
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

On 14 Aug 2006 22:38:31 -0700, kenhatch@gmail.com wrote:

>hrmm the charger says it needs 2.0 amps for optimal charging, will
>1.0amps be bad or just slow?
>

Whyat charger is it?

Some will cope some won't,

Eitherway a dedicated PSU is probably better. they go to 20A and you
have less risk if it goes bang of wrecking something expensive



>kenha...@gmail.com wrote:
>> I was wondering if I could attach the aligator clips from my charger to
>> the 12v power coming from my computers power source? The 12v line is
>> 12v@1.0a so it seems like it should work... but I dont want proceed
>> without some confirmation...

Old Aug 15, 2006, 04:11 AM
kenhatch@gmail.com
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

I was mistaken on the PSU amps 1.0a is its min amps 24a is its max.

Gavin wrote:
> On 14 Aug 2006 22:38:31 -0700, kenhatch@gmail.com wrote:
>
> >hrmm the charger says it needs 2.0 amps for optimal charging, will
> >1.0amps be bad or just slow?
> >

> Whyat charger is it?
>
> Some will cope some won't,
>
> Eitherway a dedicated PSU is probably better. they go to 20A and you
> have less risk if it goes bang of wrecking something expensive
>
>
>
> >kenha...@gmail.com wrote:
> >> I was wondering if I could attach the aligator clips from my charger to
> >> the 12v power coming from my computers power source? The 12v line is
> >> 12v@1.0a so it seems like it should work... but I dont want proceed
> >> without some confirmation...


Old Aug 15, 2006, 06:11 AM
The Raven
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

<kenhatch@gmail.com> wrote in message
news:1155620013.862133.156940@i42g2000cwa.googlegr oups.com...
>I was wondering if I could attach the aligator clips from my charger to
> the 12v power coming from my computers power source? The 12v line is
> 12v@1.0a so it seems like it should work... but I dont want proceed
> without some confirmation...


I would strongly discourage you from trying this on a PSU still attached to
a computer. However, you can modify an old PSU into a dedicated power
supply. I have built several myself as has a friend, they are reliable and
(with the right rating) can easily supply all but the hungriest of chargers.

For most PSUs you will need to load the 5V side in order to generate the
right voltage on the 12V side.

Please, do not try to hack into a spare lead on your computers power supply.
Get yourself an old supply and then modify it to suit.

--
The Raven
http://www.80scartoons.co.uk/batfinkquote.mp3
** Now I will bring chaos to the world!


Old Aug 15, 2006, 08:11 AM
The Natural Philosopher
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

kenhatch@gmail.com wrote:
> I was wondering if I could attach the aligator clips from my charger to
> the 12v power coming from my computers power source? The 12v line is
> 12v@1.0a so it seems like it should work... but I dont want proceed
> without some confirmation...
>


Can be made to yes, as long as you have a charger in between :-)

I considered this, but looked at the hassle factor, and in the end
bought an ex CB PSU off ebay 13.8v/10A.

For a time I ran a clapped out tractor battery and a trickle charger in
the den, but it was nasty and brutish,. It worked though.

Old Aug 15, 2006, 08:11 AM
Red Scholefield
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

It should work fine, many of us are using converted computer power supplies
to run our chargers.
--
Red S.
Red's R/C Battery Clinic
http://www.rcbatteryclinic.com
Check us out for "revolting" information.


>> >> I was wondering if I could attach the aligator clips from my charger
>> >> to
>> >> the 12v power coming from my computers power source? The 12v line is
>> >> 12v@1.0a so it seems like it should work... but I dont want proceed
>> >> without some confirmation...

>



Old Aug 15, 2006, 02:11 PM
Gavin
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

On Tue, 15 Aug 2006 14:05:43 +0100, The Natural Philosopher <a@b.c>
wrote:

>kenhatch@gmail.com wrote:
>> I was wondering if I could attach the aligator clips from my charger to
>> the 12v power coming from my computers power source? The 12v line is
>> 12v@1.0a so it seems like it should work... but I dont want proceed
>> without some confirmation...
>>

>
>Can be made to yes, as long as you have a charger in between :-)
>
>I considered this, but looked at the hassle factor, and in the end
>bought an ex CB PSU off ebay 13.8v/10A.
>


I did the same, looked at the doc's on the web, considered it and then
spend 30 on the ripmax one, on the grounds I'd probably never trust
anything I wired up in the house.

>For a time I ran a clapped out tractor battery and a trickle charger in
>the den, but it was nasty and brutish,. It worked though.

Old Aug 15, 2006, 02:11 PM
Storm's Hamilton
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

I've done that. works well. I bought a power supply at Goodwill for $8 and
put a resistor on the 5V wires Orignally used to power a TRriton, now has
posts to clip to and auto plugs for other things and a ciggy lighter hole
for those sorts of things.
mk

<kenhatch@gmail.com> wrote in message
news:1155620013.862133.156940@i42g2000cwa.googlegr oups.com...
>I was wondering if I could attach the aligator clips from my charger to
> the 12v power coming from my computers power source? The 12v line is
> 12v@1.0a so it seems like it should work... but I dont want proceed
> without some confirmation...
>



Old Aug 15, 2006, 06:11 PM
Ed Smega
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

What value resistor?

I am using an old compuer power supply and didn't know about the resistor on
the 5 volt supply.

Ed



"Storm's Hamilton" <htcomp.net@storms> wrote in message
news:12e455dlmdepd7a@corp.supernews.com...
> I've done that. works well. I bought a power supply at Goodwill for $8 and
> put a resistor on the 5V wires Orignally used to power a TRriton, now has
> posts to clip to and auto plugs for other things and a ciggy lighter hole
> for those sorts of things.
> mk
>
> <kenhatch@gmail.com> wrote in message
> news:1155620013.862133.156940@i42g2000cwa.googlegr oups.com...
>>I was wondering if I could attach the aligator clips from my charger to
>> the 12v power coming from my computers power source? The 12v line is
>> 12v@1.0a so it seems like it should work... but I dont want proceed
>> without some confirmation...
>>

>
>



Old Aug 15, 2006, 06:11 PM
Jim Slaughter
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

The next time a friend or neighbor is going to throw out their old obsolete
computer, grab it and get the PSU out of it!

<kenhatch@gmail.com> wrote in message
news:1155620013.862133.156940@i42g2000cwa.googlegr oups.com...
>I was wondering if I could attach the aligator clips from my charger to
> the 12v power coming from my computers power source? The 12v line is
> 12v@1.0a so it seems like it should work... but I dont want proceed
> without some confirmation...
>



Old Aug 15, 2006, 06:11 PM
Jim Slaughter
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

Can you explain the resistor thingy a little more please?

"Ed Smega" <smega@en.com> wrote in message
news:12e4hhfg3798h14@corp.supernews.com...
> What value resistor?
>
> I am using an old compuer power supply and didn't know about the resistor
> on the 5 volt supply.
>
> Ed
>
>
>
> "Storm's Hamilton" <htcomp.net@storms> wrote in message
> news:12e455dlmdepd7a@corp.supernews.com...
>> I've done that. works well. I bought a power supply at Goodwill for $8
>> and put a resistor on the 5V wires Orignally used to power a TRriton, now
>> has posts to clip to and auto plugs for other things and a ciggy lighter
>> hole for those sorts of things.
>> mk
>>
>> <kenhatch@gmail.com> wrote in message
>> news:1155620013.862133.156940@i42g2000cwa.googlegr oups.com...
>>>I was wondering if I could attach the aligator clips from my charger to
>>> the 12v power coming from my computers power source? The 12v line is
>>> 12v@1.0a so it seems like it should work... but I dont want proceed
>>> without some confirmation...
>>>

>>
>>

>
>



Old Aug 15, 2006, 06:11 PM
Storm's Hamilton
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

Boy, you would call me on that. From memory it is a low ohm, high wattage
resistor.

http://www.marcee.org/Articles/PCPowerSupply.htm

http://web2.murraystate.edu/andy.bat...owersupply.htm

Look at these links.
mk


"Ed Smega" <smega@en.com> wrote in message
news:12e4hhfg3798h14@corp.supernews.com...
> What value resistor?
>
> I am using an old compuer power supply and didn't know about the resistor
> on the 5 volt supply.
>
> Ed
>
>
>
> "Storm's Hamilton" <htcomp.net@storms> wrote in message
> news:12e455dlmdepd7a@corp.supernews.com...
>> I've done that. works well. I bought a power supply at Goodwill for $8
>> and put a resistor on the 5V wires Orignally used to power a TRriton, now
>> has posts to clip to and auto plugs for other things and a ciggy lighter
>> hole for those sorts of things.
>> mk
>>
>> <kenhatch@gmail.com> wrote in message
>> news:1155620013.862133.156940@i42g2000cwa.googlegr oups.com...
>>>I was wondering if I could attach the aligator clips from my charger to
>>> the 12v power coming from my computers power source? The 12v line is
>>> 12v@1.0a so it seems like it should work... but I dont want proceed
>>> without some confirmation...
>>>

>>
>>

>
>



Old Aug 15, 2006, 10:11 PM
Bill Sheppard
Guest
n/a Posts
Re: Can I power my Li Poly charger from my computers PSU?

From Ed=A0Smega:

>What value resistor?
>
>I am using an old compuer power supply
>and didn't know about the resistor on the >5 volt supply.


I use a 10 ohm 10 watt 'sandblock' resistor. It runs pretty hot and
needs plenty of ventilation. It was bought at RS several years ago, and
presumably is still available there. Here's a good article on the
subject - http://web2.murraystate.edu/andy.bat...OWERSUPPLY.HTM

Dunno if it's typical of all PSUs, but in this old one I have there's an
adjustment pot that allows bumping the 12 volts up a bit, to 12.6V for a
little more 'headroom'.

Bill(oc)

 


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