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