On Off power idea

[southpaw13]

I like to turn on my arcade without having to hit a switch to power on my Mame cab.  I have read many different ways to do this, but nothing worked good for my setup.  Right now my Mame cab has a pushbutton next to the cabinet on/off switch that has to be pushed to turn on the computer.   So I found a 12v multi function pulse relay that should work.  The 12V power adapter was $5 on Amazon, and the relay itself came from Ebay for $5.  So $10 total.  Basically, when the relay gets power, it counts down a few seconds and then sends a single pulse signal to my computer.  Then it also accepts a button push to reset the relay to properly turn the computer off before killing the power.  Pics attached.