Power up computer with teensy?

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ausserirdischegesund

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Is it possible to power up a computer with the teensy? There are keyboards that have a "wakeup" button, probably other devices (modems?) might wake up via USB too. Of course WOL works most of the time, but sometimes waking up via USB would be preferable (especially because the teensy does not have Ethernet built in).

Is there a solution that works most of the time, or is it luck to have a BIOS on
the computer that supports specific wake up events?
 
Guessing: My Win7 PC has a sleep button on the keyboard. It causes sleep mode to commence. Then to wake up, I press any key. So Teensy could do either of these functions.

Or you could interface a small relay to T3 and wire the relay or MOSFET to the on/off connections inside the PC; the ones that go to the ATX power supply - to turn on, pulse the power on line to ground, and vice versa, same as you do with the power button on the PC.
 
My computer wakes up on any keypress (or mouse click) as well. Like stevech says you can easily do either of those with a teensy. I'd say try that out before you go to something more complicated like WOL or a hardwired solution.
 
Most all PC keyboards have a key with a sleep incon imprinted - often a moon depiction. This creates a certain code to go USB that Microsoft or someone defined.
The BIOSes detect "any activity" on HID/USB to wakeup - if enabled in the BIOS. The BIOSes I've seen, including these new un-BIOS called UEFI which is in my current PC, have options for wake-up on mouse, wake up on serial port Ring Indicator (olden modem days), and so on. Plus WOL if the NIC supports such.
 
Does it need to be over USB? Should be easy enough to tie in to the power switch (and the power or sleep LED to know the current power state [to avoid powering off by accident]).
 
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