According to the link I posted, it says some pins go high when a PC is powered up. Maybe you could use one of those? I have no idea, though. Electronics is not my thing.
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Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |