Re: AT Power supply: how turn-on?

Hi again. I made the circuit that I told before, and it works! But another problem appeared....
Now, the PSU gives me the output voltajes 5 and 12 Volts for a second, and then this wires give me 0 and 0 volts for another second. This patron repeats all the time ----> 5...0...5...0...5 and 12...0...12...0...12, so I don´t know what can I do (I think that the motherboard-connectors (P8-P9 [HTML]http://pinouts.ru/Power/MotherboardPower_pinout.shtml[/HTML]) are the problem, but I don´t know how to connect them...)
I´m...

Re: AT Power supply: how turn-on?

Hi again. I´m trying to put this circuit in the PSU...is OK or no?
The led is a blue led and the resistor= 150 ohms. The switch is the same that a told you before.
Sorry, I thanks you for yours replies but I don´t understand what do you told me in the lastes post.
I wanna a simply solution like the mine, but I don´t know if is gonna works or not.
See you and thanks again ...

Re: AT Power supply: how turn-on?

Firts of all, I wanna to thanks to everybody who help me in this topic. I´m really grateful for yours replies!
Finally I coud turn on the PSU ! PCBONEZ and davmax are in correct: I tested with a multimeter (PSU connected to the AC line previously)the grey cable and the violet with the GND (black) cable, and these are the results (all the voltages are DC):
----------
¦ O ¦ <---- Grey : + 2,87V...........................................................
¦ O ¦ <---- Violet : + 5 V................................................................

Re: AT Power supply: how turn-on?

So what I must do?
The out-cables of the PSU are the molex, this cables :
[HTML]http://pinouts.ru/Power/MotherboardPower_pinout.shtml[/HTML]
and the 3 cables (black,grey,violet) that are also conect in the motherboard.
I have the motherboard, I turned on the cpu when I pressed one of the 3 microswitch there are in a PCB with 3 indicators-leds. This PCB have cables were conected to the motherboard to, but in other position.
i don´t know what another information i can give you for this problem.
Thanks

Re: AT Power supply: how turn-on?

I think the same that davmax,
But I didn´t connect anything because I don´t what will happen.... (EXPLOSION!!! )...

Ok, I saw this picture in this forum (attachment). I think that the cables (3) in the circle green in the second picture are the turn-on cables but I don´t know how conect bought....
One of them is GND becuse is black, but the grey and the violet????
Thanks for your reply....

Hi everybody!
I´m a rookie in the world of electronics and also in terms of english languaje, I´m not american, so my english is soo poor .
I have a AT power suply with this especification:
TOUCH ELECTRONICS CO.,LTD.
Model Nº: SP9627
FIC Part Nº: 71-50324-00
I investigated and this PSU gives 50W.
This AT PSU don´t have any switch to turn on, only have the molex and the mothers-output an three outputs (violet,grey and black) that I don´t know for what are usefull.
I need to turn on this power supply to use it in my electronics...