> I know you are out there, somewhere, and I need your help. I'm looking > to build a small circuit of some kind which will sense whether AC is > present or not and if it goes off, then a program which will shut down > my beige G3 fileserver after say, five minutes or so. I know there are > newer UPS systems designed for this purpose, but my APC UPS is but a > couple of years old and I just bought a brand new battery for it! Call > me cheap, call me dumb, I don't care, I just would like to do this > project for something to do and to save a few bucks in the process. My > idea would involve a wallwart to keep the voltage low and a sensing > circuit which would provide a signal of some sort to the serial port. > The program would poll the serial port for that signal and If it is not > detected, a count would begin and continue until approximately 5 > minutes has gone by and then proceed to safely shutdown the computer. > If the power comes back on before the 5 minutes are up, the counter > would be reset. I think most all of the newer sensing UPS systems use > USB for this process, but my old beige G3 doesn't have a USB card in > it, so I figured the serial port would work for the same purpose. So > how about it, anybody up to the challenge? > > Just a message from Doug... > What port do you have on the APC? USB or PC serial? They used to have a 9 pin PC serial cord, with a Mac DIN serial plug on the other end of their cords for my old APC unit... My current one uses USB.
I still have the old cord, if you're interested. Pete -- G-List is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- We have Apple Refurbished Monitors in stock! | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-List list info: <http://lowendmac.com/lists/g-list.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[email protected]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/g-list%40mail.maclaunch.com/> iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
