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Need help! How to get -5v out of newer ATX Power Supply's

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Franco B:
Its a DC-DC convertor. You can input 4v to 14v and output -1.3v to -12v

I have the input wired to the 12v of the Jamma edge and the output set to -5v and wired to the -5v pin which provides 0.5A

I used it for games that require -5v for the audio amp as the PSU I had didn't supply -5v.

More details [here]

Savannan:
Wow..it sounds like its the thing I need..
But just wondering if it will work if I soldered that to my main jamma harness...plugged it into my 6 in 1 switcher and ran a midway game....?  Hmmm...
It would suck If I need one of these per game.

Sav

BobA:
A negatron costs about $20 and if you need one for each board it is quite pricy.  An LM 7905 is about $2 and with the 2 caps needed comes in less than $3.

Franco B:
I don't suppose you could provide a wiring diagram/parts list for the LM 7905 solution could you BobA, I would love to see it.

BobA:

--- Quote from: Franco B on September 24, 2011, 04:36:30 pm ---I don't suppose you could provide a wiring diagram/parts list for the LM 7905 solution could you BobA, I would love to see it.

--- End quote ---

Here is the data sheet with sample circuit.

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