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More than 12v from PSU?

D

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!
 
No. The potential difference between the yellow (12V) and red (5V) wires is 12V - 5V = 7V.
 
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.
 
Zero82z said:
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.
Click to expand...


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
 
d44ve said:
That is exactly wanted I wanted to know... So basically connect the red and yellow into the same molex connector will do it?
Click to expand...
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.
 
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?
 
Zero82z said:
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.
Click to expand...

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.
 
ryan_975 said:
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.
Click to expand...

WTF? Makes no sense

Zero82z said:
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.
Click to expand...

+1
 
ryan_975 said:
Actually that would be 12v + (-5v) = 17v.
Click to expand...

no thats wrong. its 12 - (-5) which equals 17. the equation you wrote is 12 plus negative 5, which is essentially 12 minus 5, which is 7 Volts.

holy crap. 1000 subscribed threads! :D
 
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