FrankenPower! Building a 12V Power Supply

[adrian]

thanks Ernie will use the right one - was trying as I have 5 of these other resistors leftover from another project was just the thought of not wasting - will go with the recommended one 10ohm 10w - thanks again

PS; i tried to start without load - no luck so i do need the resistors!!

[3ddd]

adrien use two 1ohm 10watt in series and that will keep the volts up

[Cracky]

I need to make a run to Radio Shack and get two of the 1 ohm resistors. I'm at 12.2 with a 10 ohm and want to see if it will change.

[macanaw]

	Quote: Originally Posted by Cracky
	I need to make a run to Radio Shack and get two of the 1 ohm resistors. I'm at 12.2 with a 10 ohm and want to see if it will change.

Cracky,

Grab (2) 1 ohm 10watt resistors and put them on seperate red and black leads. That took mine up to 12.61v

[Cracky]

I don't think that I kept any extra red leads.....I'll see what they do in series first (hopefully over 12.5) then to do two taps if its not. I have no reason why I want over 12.5 other than "huh, I wonder if I can get it over 12.5".

[khedge]

So don't use the single 10 ohm and leave 4 red and black wires( 2 red and 2 black)? Does fry electronics sell and power supplies that are similar to the one Mike uses?

[macanaw]

	Quote: Originally Posted by khedge
	So don't use the single 10 ohm and leave 4 red and black wires( 2 red and 2 black)? Does fry electronics sell and power supplies that are similar to the one Mike uses?

Indeed they do.
As far as what ohm and how many resistors to use...just grab a couple and try different combinations to see what works best for your particular power supply as they are all a little different. It seems fairly consistent that 1 ohm 10 watt give the best results, so grab a couple of those and try them in series, on separate 5v leads etc...

David

[tuffthegamer]

This is a great great thread. I just built my first power supply and works great. The only question I have is, when a power supply says +12v at 14Amp, does that mean it can only supply a total of 14 amps on the 12v rail? I thought it worked per yellow black connection, in other words if there were 3 yellow and 3 black wires, I could have 12 v and 14 amps per pair... I believe this is wrong, but, wanted to double check.

Once again, great help here in these forums.

Thanks

[Mike Bargman]

It means that there is only 14 Amps total. Unless there are separate rails, you have to split the amperage between the rails...

[adrian]

[quote=3ddd;380373]adrien use two 1ohm 10watt in series and that will keep the volts up[/quo

'will do - tx bro!!

[3ddd]

no problem

[khedge]

Thanks guy for the help, how many banana plugs set are you yall installing your power supply. I considering doing 4 but I didn't know it there is a enough leads. Does the ATX 500 power supply put out 34 amps max?