eb2e+@andrew.cmu.edu (Eric James Bales) (02/26/90)
Does anyone know where I might aquire a very accurate clock for a PC? That is to say, one that is accurate to within a couple of seconds over a year. ----------------------------------------------------------------------- eb2e+@andrew.cmu.edu -Eric Kirkbride- People seek power for the freedom that comes with it. Once they have the power, they forget why they wanted the freedom. Disclaimer: These are only my opinions, etc...
besler@cetus.mi.org (Brent H. Besler) (02/26/90)
> Does anyone know where I might aquire a very accurate clock for > a PC? That is to say, one that is accurate to within a couple of > seconds over a year. Well it depends to what lengths and expense you want to go to for accuracy. The ultimate would be to get the Heathkit "Most Accurate Clock". It is a special clock which recieves WWV(The NBS time standard) and constantly recilabrates itself. It has an RS-232 interface and Heath sells MS-DOS interface software. There has been some posting about it on sci.electronics in the past month. The clock is about $250 and the software is $25.
davidsen@sixhub.UUCP (Wm E. Davidsen Jr) (02/26/90)
If you just want to know what time it is, you can get a Heathkit "Most
Accurate Clock" kit. This gets the time from WWV and updates the time of
day. The standard PC clock is usually accurate to five digits for
short interval timing.
--
bill davidsen - davidsen@sixhub.uucp (uunet!crdgw1!sixhub!davidsen)
sysop *IX BBS and Public Access UNIX
moderator of comp.binaries.ibm.pc
"Getting old is bad, but it beats the hell out of the alternative" -anonjohnl@esegue.segue.boston.ma.us (John R. Levine) (02/27/90)
In article <5548@cetus.mi.org> besler@cetus.mi.org (Brent H. Besler) writes: >> Does anyone know where I might aquire a very accurate clock for >> a PC? ... > >Well it depends to what lengths and expense you want to go to for accuracy. >The ultimate would be to get the Heathkit "Most Accurate Clock". >... The clock is about $250 and the software is $25. An alternate approach is to get the cheapest modem you can find, about $50, and call the NBS's modem time phone when you want to reset the clock in your computer. A program to do so floated across comp.sources.misc a month or two ago. The cost is about 35 cents/call (a one minute call to Colorado), plus your time porting the simple program that resets the clock. At that rate, you can make a lot of calls before you spend $250. -- John R. Levine, Segue Software, POB 349, Cambridge MA 02238, +1 617 864 9650 johnl@esegue.segue.boston.ma.us, {ima|lotus|spdcc}!esegue!johnl "Now, we are all jelly doughnuts."