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-5v - from an ATX psu?

Repairs & upgrades.
terriblefire
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Re: -5v - from an ATX psu?

Post by terriblefire »

Tomswork wrote: Fri Dec 13, 2019 5:08 am The white wire on atx supply is minus 5v same as that Atari supply'

Tom
But as mentioned above.. that has apparently been removed on newer ATX versions.

Although its still possible to get ATX v1.0 supplies.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Tomswork
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Re: -5v - from an ATX psu?

Post by Tomswork »

Interesting I live in Canada and even the latest new psu on the shelf have the minus 5 line as standard on the 20pin and 24 pin connector. Is this a area specific change

Tom
terriblefire
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Re: -5v - from an ATX psu?

Post by terriblefire »

Tomswork wrote: Fri Dec 13, 2019 8:08 am Interesting I live in Canada and even the latest new psu on the shelf have the minus 5 line as standard on the 20pin and 24 pin connector. Is this a area specific change
No its an ATX version change. But I suspect nothing actually uses ATX v3.0 yet.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Tomswork
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Joined: Fri Nov 22, 2019 10:05 pm

Re: -5v - from an ATX psu?

Post by Tomswork »

Interesting just looked up the ver 3 and pin 20 is now marked nc
I guess I'm getting old

Tom
Tomswork
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Re: -5v - from an ATX psu?

Post by Tomswork »

I think something could be done with the -12v out side with a 7805 zenier diode and resistor how much current does you need on the -5 this is wasteful and will get warm

Tom
Tomswork
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Joined: Fri Nov 22, 2019 10:05 pm

Re: -5v - from an ATX psu?

Post by Tomswork »

Try a simple in4007 diode in the input of the 7905 a few capacitors maybe needed

Tom
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