|Jul 02, 2011, 08:10 AM|
that 1k resistor keeps the leprechaun from lighting his blunt inside that power supply.
Are the Green and White wires on the DB15 labeled 4 and 13?
The numbers should be on the DB15 connector next to the pins.
As jj604 said, don't tie the +5v And +12v together. It will cause the fault protection to kick in.
|Jul 02, 2011, 08:34 AM|
Hey back, xandrios,
Green and white are, indeed labeled 4 and 13.
I found the following during my internet searches...
On this model of PS there are two jacks, one is internal wiring and the other output. As I was only wanting 12vdc I tapped these as my output. The bottom right connection on the output jack goes back to the board and is tagged on/off. This was grounded to the green coming from the internal horz. connector on the left,looking from the rear. As to the internal wiring I picked up the 6v and installed a 6psb lamp to steady the output. The only internal connection that has be made is the black that goes between the two internal connectors, one horz. and one vert. It's working good for me at this time and also have put a fan on. Like I said at top, I'm no whiz at this, but hope info may help. Later, Kirk.
The above is from this url:
here is the long version of the url in case the other doesn't work
I wonder if I'll need to find 6v in this thing and buy a little lamp. Hmm
|Jul 04, 2011, 08:43 PM|
|Jul 04, 2011, 11:16 PM|
Thanks for the help xandrios and all.
I got the HP power supply working and then realized there's only 22Amps on that 12V circuit. LOL
When charging a 4S with the inexpensive B6 charger at 3.3Amps, the voltage drops to 11.87.
I don't know the effects of using 3 B6 chargers in parallel at a 5Amp rate.
There's only 16Amps supplied on the Dell PS 12volt side, so those will be recycled.
As it turns out, I didn't need to use a 6v lamp as was noted in post 782
I left the 1K resistor between the on/off and the green from the internal horizontal connector.
Seems to work well with this one B6 Charger. I may get a low voltage alarm when running multiple chargers, or when charging one large battery, but it's working well this load.
(charging two 4S at 3.3Amps each with two B6 Chargers and the supply voltage drops to 11.82 according to the B6 charger display.) I actually set the charge rate to 5Amps, but the B6 determined 3.3Amps was enough.
|Jul 05, 2011, 06:50 AM|
It depends on the charger but simple fact is that the difference between available power output at 11.0V and 12.0V is not that great.
12V input = approx. 270 watts output
11.0V input = approx. 247 watts
The 23 watts difference in charger's output is not going to make much of a difference in charging most LiPolys in the real world.
If one plans on using a 12V Pb (lead acid / deep cycle) battery as a field power source then output of charger with 11V input is really a better performance indicator,IMO.
To many chargers list output of XXX watts but fail to stste that 17 volts or 27 volts are required to obtain max. output. How ,many have 17V or 27v available at the field?
|Jul 05, 2011, 04:11 PM|
Joined Jun 2011
Regarding Post#470 by Xandrios regulating the voltage of the HP580 ps:
What wattage resistors did you use to regulate the voltage? Would 1/4W be fine?
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