More than 12v from PSU?

d44ve

Limp Gawd
Joined
Mar 28, 2007
Messages
422
Can you get more than 12volts running through the molex connector?

I thought I read somewhere a long time ago that someone combined the yellow and red (i think) wires to produce more than 12volts. Is this possible or is there a way of doing it?


Thanks!
 

Oline61

Gawd
Joined
Aug 8, 2005
Messages
869
No. The potential difference between the yellow (12V) and red (5V) wires is 12V - 5V = 7V.
 

Zero82z

Fully [H]
Joined
Jan 20, 2004
Messages
27,897
Grounding to the red wire will give you 7V. However, combining the yellow and red wires and grounding your circuit to a black wire will give you 17V.
 

d44ve

Limp Gawd
Joined
Mar 28, 2007
Messages
422
Grounding to the red wire will give you 7V. However, combining the yellow and red wires and grounding your circuit to a black wire will give you 17V.


That is exactly wanted I wanted to know... So basically connect the red and yellow into the same molex connector will do it?

Thank you very much for your help
 

Zero82z

Fully [H]
Joined
Jan 20, 2004
Messages
27,897
That is exactly wanted I wanted to know... So basically connect the red and yellow into the same molex connector will do it?
Into the same pin, yes. But whether or not it's safe depends on what you plan on doing. Please elaborate before you go out and actually do something, because I'd rather not be responsible for you trying something dangerous.
 

grjr

[H]ard|Gawd
Joined
Mar 25, 2002
Messages
1,921
What are you guys talking about? Are you saying to connect the red and yellow voltage rails together? You shouldn't do that, you'll definitely fry something doing that. How many volts do you need and what for?
 

BinarySynapse

[H]F Junkie
Joined
Feb 6, 2006
Messages
15,103
Grounding to the red wire will give you 7V. However, combining the yellow and red wires and grounding your circuit to a black wire will give you 17V.

Where in the hell did you get this information?

You can get +/-17v from a PSU, but only if it has a -5v rail, and then you're limited to 2.5amps. You can also use -12v and +5v for +/-17v, and +12v and -12v for +/-24volts.
 

tonyluu

Gawd
Joined
Dec 20, 2008
Messages
613
Where in the hell did you get this information?

You can get +/-17v from a PSU, but only if it has a -5v rail, and then you're limited to 2.5amps. You can also use -12v and +5v for +/-17v, and +12v and -12v for +/-24volts.

WTF? Makes no sense

Grounding to the red wire will give you 7V. However, combining the yellow and red wires and grounding your circuit to a black wire will give you 17V.

+1
 
Top