VOGONS


First post, by renejr902

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Hi guys! I have to know the power switch pinout of a AT power supply. I know all of them have a black, white, blue and a brown wires. I need to connect it to a atx case. ATX case has 2 pins for the power switch. I dont want to make a mistake and burn everything. I will use the power supply in my uploaded picture.

Thanks for answer or help.

( I have a lot of power switch cables with 2 pins, no one with 4 pins. )

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Reply 1 of 11, by adalbert

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You have a pushbutton in that ATX case? It can not be used for turning on AT power supply. There is dangerous 120/240V on AT power supply wires, and a special isolated switch must be used.

Reply 2 of 11, by TheMobRules

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Yes, you need a switch that is rated for AC mains voltages, and it has to be a latching button, meaning that it "stays pushed". The little switches in ATX case are not rated for mains voltage and are momentary, so they won't work here.

Besides, the switch must have 4 terminals, and you must wire it so that when you press the button, black is connected to brown and white is connected to blue (as indicated in your PSU label).

Reply 3 of 11, by adalbert

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These switches usually look like this:

61+gHAapu8L._SL1500_.jpg
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Maybe something like this also could be used:

71rALSX30uL._SL1500_.jpg
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Reply 4 of 11, by renejr902

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Oh ok! Hmm i really didnt know. I use my other at case for test. I didnt know about all of this and for a atx case.

I will check all my power switch in my really old stock box. Maybe i have one or more.

Reply 5 of 11, by renejr902

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adalbert wrote on 2020-10-27, 15:42:
These switches usually look like this: 61+gHAapu8L._SL1500_.jpg […]
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These switches usually look like this:
61+gHAapu8L._SL1500_.jpg

Maybe something like this also could be used:
71rALSX30uL._SL1500_.jpg

TheMobRules wrote on 2020-10-27, 15:19:

Yes, you need a switch that is rated for AC mains voltages, and it has to be a latching button, meaning that it "stays pushed". The little switches in ATX case are not rated for mains voltage and are momentary, so they won't work here.

Besides, the switch must have 4 terminals, and you must wire it so that when you press the button, black is connected to brown and white is connected to blue (as indicated in your PSU label).

And what about the at to atx adapter i just bought from china on ebay ? Do i need a special power switch too ? the adapter only qave 2 wries for power switch ? thanks for answer

See pictures i just bough this one a few days ago. it could take 1-2 months to be in Canada.

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Reply 6 of 11, by adalbert

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If you use ATX power supply and this adapter you can safely use any switch, because there is no high voltage. But that switch cannot be momentary, it must hold its position after pressing. You can use a switch like this, you should be able to buy it in any electronic store for few cents. 4 pin switches would also work, you just use only 2 pins.

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You can also just connect these two wires together, without any switch. Then you would be turning your PC on and off with the power switch on the back of power supply.

Reply 8 of 11, by renejr902

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i got it working with this. Check the picture.
it has 5 pins. But one is for a led that i didnt use.
Thanks again.

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Reply 10 of 11, by Doornkaat

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OSkar000 wrote on 2020-10-28, 04:55:

Is that swithch rated for 120/240v and 10A? Looks like something from a car to me.

I would not use that switch.

I understand the voltage rating, but why 10A when even the PSU fuse is rated at 5A?