Quote: Originally Posted by
Shad0wca7 
I think I might be getting slightly confused about using the transistor to short the wires, would this work correctly or am I on totally the wrong path:?
That's about what I use. The pullup is on the motherboard though, and the grounded switch line is not needed (only one line is needed).
Quote: Originally Posted by
dupa2 wow, I'm surprised you ended up using such a weird solution for power button driver. First of all, the power button will accept standard ACPI signal, and since you work with 5VDC already, all you need is just one tiny transistor with pull-up resistor that will make ~0.5ms 0V pulse.
Like the circuit he posted above?
Quote: Originally Posted by
dupa2 Instead of regular relays, I'd use solid state relays that typically can handle at least 10Amps, you don't need any high-end SSR, just get the cheapest one with triac output.
Like the high side driver I linked to (VN30N).
Quote: Originally Posted by
Curiosity Actually, all you need is a diode for the power button. If it works like a PIC, and I think it does, when off and set to output a digital line pulls to ground with the internal transistor. You just have to make sure it's on the whole time when the main relay is on. I used that for 8x8 LED matrix displays.
True, if you can get it to pull low enough.
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