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My first cab: Mame Bartop cab from laptop guts.
GadgetGeek:
If the bios supports it, turn on wake-on-keyboard and then just any keypress should turn it back on.
ulfur:
Unfortunately this old bios doesn't support wake-on much anything.
However, I just had a look and the power button circuit isn't anything special at all.
All that is needed is to short pin 9 of the connector to ground and that either switches on or of depending on the current state.
This leaves me with two options. I can either permanently short the pin which means that whenever there's power to the computer it'll turn on and whenever the power is taken of it'll shut off.
The other option would be to hook any standard momentary switch up to the circuit and make it accessable from outside the cab.
There is a third option involving a custom circuit but it's way more hassle than it's worth and I'm way too lazy to implement it.
In any case this is a pretty easy problem to solve and it definitely shouldn't deter anyone from using laptop guts for a Mame cabinet :)
Donkbaca:
go for option 2, if its permanently shorted, when you plug it in it will turn on for a few minutes and then shut itself down.
ulfur:
--- Quote from: Donkbaca on March 04, 2011, 03:23:54 pm ---go for option 2, if its permanently shorted, when you plug it in it will turn on for a few minutes and then shut itself down.
--- End quote ---
You think? You could be right, I tried keeping it continually pressed before but I doubt I ever tried for more than a minute.
I might jump it temporarly later just to find out but I was leaning towards option two any way, it just seems a lot more sane for several reasons.
phatmeat:
I just did something like what you are doing . Have fun . Here is a link , I dont have pics of the built though ???
http://forum.arcadecontrols.com/index.php?topic=109825.0
Here is the best pic of the on switch that I wired to a arcade button to turn the computer on and put into sleep mode . Since the switch is most likely a surface mount you will have to do a continuity test the switch leads . The solder area is really small . I was able to connnect 2 wires to the solder joints. It was 24 or smaller gauge wire.
Hope it helps GL