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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Unbelievable accuracy from a walmart watch
Ignoramus30509 wrote:
A week ago I posted a surprised message about a $6 watch from walmart that seemed to be accurate. I have a little more data now. About 2 weeks ago, I set this watch very accurately to time that is kept by syncronizing with an NTP server (atomic clock), to the second. Today I checked time again whiel trying to be very good at catching the right moment. I typed "date" and pressed ENTER just as the arm of the watch passed :00:00. The result is that the watch is not even by one second off!!! Obviously, there are limits to my own precision in how I pressed the return key right when the watch ticked :00, plus the OS delay in starting "date", but in any case I could not detect any difference. I find it rather amazing, really. The watch is a quartz watch with hands, "water resistant". Quartz crystal oscillators can be extremely precise. I worked in an electronics design group for awhile that designed crystal oscillator chips, so I felt a pull to own a watch which used one. I wound up with a nice Tag Heuer, keeps great time too. GWE |
#2
Posted to rec.crafts.metalworking
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Unbelievable accuracy from a walmart watch
I havea sunbeam walclock with a taiwan mechanism that went thru a fire
and still never drops a second. A single AA battery lasts 2 years in this one. I hate time. It just never stops and this clock just ticks away loudly. I'm gonna have to discus this thing |
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