[K12OSN] OT: Hardware Hacking: Share one UPS between two computers

[Peter Hartmann]

> That might work with a standard serial port where the ups software
> just watched the CD lead to become active

Really? Cool, that's actually another option for us.  So you think I
could get a serial y-splitter and connect everything?


Thanks,
Peter



On 12/18/05, Les Mikesell <les at futuresource.com> wrote:
> On Sun, 2005-12-18 at 12:07, Peter Hartmann wrote:
> > I'm looking to share an APC UPS between to computers with USB in a DIY
> > fashion. Can't I just splice 2 A male connectors (leaving the 5v +
> > unconnected) with a female A connector? To be more specific I mean to
> > connect all the pin 2s to each other; all the pin 3s to each other;
> > all the pin 4's to each other and leave all the pin 1s unconnected.
> > I'm trying the UPS to signal the shutdown without networking because
> > one computer is in the dmz and the other is the LTSP server.
>
> That might work with a standard serial port where the ups software
> just watched the CD lead to become active but I don't think
> you can do it with USB.  Maybe you could just connect to your
> inside machine and add something in the shutdown sequence to
> ssh a shutdown command to the dmz box.
>
> --
>   Les Mikesell
>     les at futuresource.com
>
>
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