[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

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



Thanks for all the ideas you guys.  I think I'm going going to
experiment with a custom serial cable first.

> and won't burn out your motherboard
> if you mess up.

You can't fry anything with a signal.   From what I understand serial
ports do not provide any power unlike USB and firewire (6 pin only).

And then if that doesn't pan out use the master/slave mode and make
the master the dmzbox.  Apparently you can make the slave poll the
master by domain name.

## apcupsd.conf v1.1 ##
     UPSCABLE ether
     UPSTYPE net
     LOCKFILE /var/lock
     DEVICE server-network-address:3551
     UPSCLASS standalone
     UPSMODE disable
     NETTIME 10

The only trouble I can foresee would come from the fact that we're
using dynamic dns.  I'm not exactly sure how long it takes to get
updated if our isp hands us a different ip address.  But what are the
chances of having that coincide with a power outage?

> Another route could be to try and copy /dev/tty0 to /dev/tty1 and then
> run up the UPS software - see if that works?
>

Jon, what do you mean by this?



Thanks all,
Peter




On 12/19/05, Andrew Fisk <andy spitcomp com> wrote:
> Why not just have the dmz box ping the LTSP box and shut it's self down if
> it misses 4 or 5 pings?  Its quick, easy and won't burn out your motherboard
> if you mess up.
>
>
>
> Thanks
>
> Andy
> Spitfire Computer Services
> 441 Beaver Street
> Suite 202
> Sewickley, PA 15143
> Phone (412) 749-0162
> Fax: (412) 749-0203
> andy spitcomp com
> www.spitcomp.com
>
>
> On Dec 19, 2005, at 2:42 AM, Jon Spriggs wrote:
>
> On 18/12/05, Peter Hartmann <ascensiontech gmail com> 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.
>
>
> What do you think, will that work?
>
>
> Peter,
>
> The correct route is to add a "ShareUPS" device to the mix. The
> shareUPS takes a feed from the UPS and then splits out 4 or 5 serial
> ports. I don't know the pricing - I just get given them at work!
>
> Another route could be to try and copy /dev/tty0 to /dev/tty1 and then
> run up the UPS software - see if that works?
>
> Jon
>
> _______________________________________________
> K12OSN mailing list
> K12OSN redhat com
> https://www.redhat.com/mailman/listinfo/k12osn
> For more info see <http://www.k12os.org>
>
>
>
> _______________________________________________
> K12OSN mailing list
> K12OSN redhat com
> https://www.redhat.com/mailman/listinfo/k12osn
> For more info see <http://www.k12os.org>
>
>


[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]