[RCSE] 12V Bench Power Supply

2005-09-02 Thread David Register
A newbie here in town borrowed one of my converted PC power supplies for 
charging his electric and then started looking for a new PC supply of 
his own. He found a really good deal which I've converted and it works 
very well. In our area, used PC supplies are getting harder to find (for 
free) and it pains me to pay $20 for a used supply.


This conversion is very easy (see Red's Battery Clinic article at 
http://www.rcbatteryclinic.com/) and follows the ATX conversion with the 
exception that you only need to ground the PS-On wire to make the supply 
work properly. No need for the 'Power Good' line. On this one the PS-On 
wire was green on the motherboard connector but it's clearly marked on 
the circuit board inside the case.


Supply is a 250W unit from Tiger Direct. Cost is $15 +S/H. Add a couple 
of bucks and a little sawing on the case to fit a banana plug 
receptacle, clip and shield a few wires and you're done. I've been 
running this one for a few days on GP, Sirius AstroFlight and FMA 
chargers for NICd, NiMH and LiPos (Tx, Rx and motor packs) with no 
problems. Haven't pushed current too hard (couple of amps) but the 
supply is rated for 10A so it will probably deliver 8 or so.


Just FYI for those looking for an easy way to get 12V bench power for 
your field chargers.


- Dave R
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Re: [RCSE] 12V Bench Power Supply

2005-09-02 Thread Dan Kitching
I'm using a converted ATX power supply as well and it's great, with one 
exception. My Orbit Pro charger has a power switch, and when I turn it 
on the power supply shuts down. I've never opened it up, but imagine it 
might have a largish capacitor that sucks a largish amount of current 
when first turned on. Maybe the power supply sees this current and shuts 
off to protect itself.


Weird, but my other chargers, including a GP Triton work great on this 
power supply.


 Dan

David Register wrote:

A newbie here in town borrowed one of my converted PC power supplies 
for charging his electric and then started looking for a new PC supply 
of his own. He found a really good deal which I've converted and it 
works very well. In our area, used PC supplies are getting harder to 
find (for free) and it pains me to pay $20 for a used supply.


This conversion is very easy (see Red's Battery Clinic article at 
http://www.rcbatteryclinic.com/) and follows the ATX conversion with 
the exception that you only need to ground the PS-On wire to make the 
supply work properly. No need for the 'Power Good' line. On this one 
the PS-On wire was green on the motherboard connector but it's clearly 
marked on the circuit board inside the case.


Supply is a 250W unit from Tiger Direct. Cost is $15 +S/H. Add a 
couple of bucks and a little sawing on the case to fit a banana plug 
receptacle, clip and shield a few wires and you're done. I've been 
running this one for a few days on GP, Sirius AstroFlight and FMA 
chargers for NICd, NiMH and LiPos (Tx, Rx and motor packs) with no 
problems. Haven't pushed current too hard (couple of amps) but the 
supply is rated for 10A so it will probably deliver 8 or so.


Just FYI for those looking for an easy way to get 12V bench power for 
your field chargers.


- Dave R
RCSE-List facilities provided by Model Airplane News.  Send 
subscribe and unsubscribe requests to [EMAIL PROTECTED]  
Please note that subscribe and unsubscribe messages must be sent in 
text only format with MIME turned off.  Email sent from web based 
email such as Hotmail and AOL are generally NOT in text format





RCSE-List facilities provided by Model Airplane News.  Send subscribe and 
unsubscribe requests to [EMAIL PROTECTED]  Please note that subscribe and unsubscribe 
messages must be sent in text only format with MIME turned off.  Email sent from web based email 
such as Hotmail and AOL are generally NOT in text format


Re: [RCSE] 12V Bench Power Supply

2005-09-02 Thread Richard Hallett

You may not have a big enough load on the 5v supply.

Sounds dumb.

All regulation is done on the 5v supply and if you do not draw enough 
current on the 5v supply it will probably shut down.


And all you wanted was 12v.

Rick
Richard Hallett Pittsfield ME

Dan Kitching wrote:
I'm using a converted ATX power supply as well and it's great, with one 
exception. My Orbit Pro charger has a power switch, and when I turn it 
on the power supply shuts down. I've never opened it up, but imagine it 
might have a largish capacitor that sucks a largish amount of current 
when first turned on. Maybe the power supply sees this current and shuts 
off to protect itself.


Weird, but my other chargers, including a GP Triton work great on this 
power supply.


 Dan

David Register wrote:

A newbie here in town borrowed one of my converted PC power supplies 
for charging his electric and then started looking for a new PC supply 
of his own. He found a really good deal which I've converted and it 
works very well. In our area, used PC supplies are getting harder to 
find (for free) and it pains me to pay $20 for a used supply.


This conversion is very easy (see Red's Battery Clinic article at 
http://www.rcbatteryclinic.com/) and follows the ATX conversion with 
the exception that you only need to ground the PS-On wire to make the 
supply work properly. No need for the 'Power Good' line. On this one 
the PS-On wire was green on the motherboard connector but it's clearly 
marked on the circuit board inside the case.


Supply is a 250W unit from Tiger Direct. Cost is $15 +S/H. Add a 
couple of bucks and a little sawing on the case to fit a banana plug 
receptacle, clip and shield a few wires and you're done. I've been 
running this one for a few days on GP, Sirius AstroFlight and FMA 
chargers for NICd, NiMH and LiPos (Tx, Rx and motor packs) with no 
problems. Haven't pushed current too hard (couple of amps) but the 
supply is rated for 10A so it will probably deliver 8 or so.


Just FYI for those looking for an easy way to get 12V bench power for 
your field chargers.


- Dave R
RCSE-List facilities provided by Model Airplane News.  Send 
subscribe and unsubscribe requests to [EMAIL PROTECTED]  
Please note that subscribe and unsubscribe messages must be sent in 
text only format with MIME turned off.  Email sent from web based 
email such as Hotmail and AOL are generally NOT in text format





RCSE-List facilities provided by Model Airplane News.  Send subscribe 
and unsubscribe requests to [EMAIL PROTECTED]  Please note 
that subscribe and unsubscribe messages must be sent in text only format 
with MIME turned off.  Email sent from web based email such as Hotmail 
and AOL are generally NOT in text format



RCSE-List facilities provided by Model Airplane News.  Send subscribe and 
unsubscribe requests to [EMAIL PROTECTED]  Please note that subscribe and unsubscribe 
messages must be sent in text only format with MIME turned off.  Email sent from web based email 
such as Hotmail and AOL are generally NOT in text format