RC-Monster Forums - View Single Post - Computer supplys for charger power question

BrianG · 01:57 AM

If hat brown wire is a feedback wire, it's for the 3.3v line, which won't do much for the 12v line unfortunately.

And yes, it's pretty common for the voltages to be a bit under/over their values. IIRC, the ATX spec allows for +/- 5%.

The only thing I could say is to load the 5v line and see what it does, and/or open her up and see if there is a pot in there you can fiddle with.

Oh, and if you do end up loading the 5v line, make sure the power rating of the resistor is at least 4x the power needed because it will get quite hot otherwise. If you do load it with 1A, that means you'll need a 5 ohm resistor rated for 20w (or two 10 ohms in parallel, each rated for 10w).

	(#8)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	01.10.2011, 01:55 AM If hat brown wire is a feedback wire, it's for the 3.3v line, which won't do much for the 12v line unfortunately. And yes, it's pretty common for the voltages to be a bit under/over their values. IIRC, the ATX spec allows for +/- 5%. The only thing I could say is to load the 5v line and see what it does, and/or open her up and see if there is a pot in there you can fiddle with. Oh, and if you do end up loading the 5v line, make sure the power rating of the resistor is at least 4x the power needed because it will get quite hot otherwise. If you do load it with 1A, that means you'll need a 5 ohm resistor rated for 20w (or two 10 ohms in parallel, each rated for 10w). Last edited by BrianG; 01.10.2011 at 01:57 AM.