On Saturday 29 November 2008, Mark Wendt (Contractor) wrote: >At 12:07 PM 11/28/2008, you wrote: >>Having a UPS(s) to bridge the time between mains outage to generator >>output was part of the plan. I would bridge just the equipment needed. >>If I can boot the generator controller in a minute or two, it won't need >>to be on all of the time. I'd like to save energy wherever I can. >> >>Thinking a little more, I guess I could use something like a solar >>inverter as a UPS which would have a fair amount of intelligence built >>in. Or, I could try to get the Ubuntu/HAL computer to do the UPS and >>generator function together, in which case it would need to be on all of >>the time. This is getting more complex. >> >>But, ... UPS's are complex due to having to come on-line instantly, >>which a solar inverter might not be designed to do. It would be nice to >>have one unit that backed up power to the whole house, but I may be >>better off having stand alone UPS's on just the critical equipment. >> >>I haven't put enough effort into this yet. >>----------- >>Kirk >>http://www.wallacecompany.com/machine_shop/ > >Kirk, > > See, that's the thing - most UPS's "don't" have to come >on-line instantly. They're already on-line. When you plug your >machine into an UPS, you are getting filtered power from the >batteries. Most of the time, you are basically getting some high >class surge protection from the UPS, since all the power is filtered >through the batteries and converted back to AC on the output. When >there's a power outage, there's no switch to trip in the UPS to "turn >it on" because it's already "on." They are on-line all the time. > > If you ran the computer headless, you really wouldn't be >using a whole lot of power with just the base unit. About the amount >of a 100 watt bulb most of the time. > >Mark > The pc power requirement can be reduced even further by changing the filesystem to one that doesn't wear out a compact flash card like ext3 will. I am running the x86 version of dd-wrt on an old K6-iii equipt box, with 3 nics in it, one of them wireless, as a router. Booting from a CF card plugged into an adapter on the end of an IDE cable, no hard drive, no floppy, only the cpu and psu fans are running and I doubt if I'm using 40 watts, with 50% of that being psu inefficiency at that low a load.
dd-wrt is a router/firewall running on top of the busybox release. The firewall is good, I haven't been touched since I switched out a linksys router. One of linux's best kept secrets IMO. > >------------------------------------------------------------------------- >This SF.Net email is sponsored by the Moblin Your Move Developer's challenge >Build the coolest Linux based applications with Moblin SDK & win great > prizes Grand prize is a trip for two to an Open Source event anywhere in > the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ >_______________________________________________ >Emc-users mailing list >[email protected] >https://lists.sourceforge.net/lists/listinfo/emc-users -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) There is a 20% chance of tomorrow. ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
