relays and computers.... http://www.youtube.com/watch?v=n3wPBcmSb2U
On Mar 10, 2011, at 2:52 PM, Joe Chisolm - Gmail wrote: > > > On 03/10/2011 04:10 PM, Karl Hammar wrote: >> Balogh: >>> http://www.robotika.sk/projects/virtuallab/atxswitch/images/ATXswitch.png >> I see, you "press" the button as soon there is +5VSB, but in my >> case I need power on the +12V rail, else the motherboard is totally >> powerless. So I have to start the power supply first. >> > If the motherboard power is really dead (no V standby) until you power the > 12V rail then your only source of power to do the power on circuit is off the > mains unless you can pull Vsb out of the power supply. If, however, you see > +5 on the WOL connector when the 12V rail is off then that is your source. > You can do this many ways. A simple way is 2 relays. A couple of DPST will > do the trick. Take the +5 off the WOL, through the NC side of relay1 and to > the coil of relay2. The NO side of relay 2 is connected to the power switch. > The coil of relay1 is driven by the 12V rail. When the 12V rail is off +5 > will energize relay2 that will attempt to turn power on. As soon as the 12V > rail comes up relay1 will energize and stop the coil power to relay2 thus > "releasing" the power push button. This is a always on type of setup. The > only way to turn the unit off and keep it off is to unplug the power cord. >> Back to your picture. I have not found any spec for the wol connector >> but it seems that the wol pin is +5V active high. So, in your case >> wouldn't it be simpler just to momentarly short the +5V and wol pins >> of the wol connector to start the pc? >> >> Regards, >> /Karl Hammar >> >> ----------------------------------------------------------------------- >> Aspö Data >> Lilla Aspö 148 >> S-742 94 Östhammar >> Sweden >> +46 173 140 57 >> >> >> >> >> _______________________________________________ >> geda-user mailing list >> geda-user@moria.seul.org >> http://www.seul.org/cgi-bin/mailman/listinfo/geda-user >> > > -- > Joe Chisolm > Marble Falls, Tx. > > > > > _______________________________________________ > geda-user mailing list > geda-user@moria.seul.org > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
