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Ian Field Ian Field is offline
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Default LED alarm clocks all lose accuracy over time


"Cydrome Leader" wrote in message
...
gregz wrote:
"William Sommerwerck" wrote:
Many years ago I reviewed Heath's "Most-Accurate Clock" for one of Ed
Dell's
magazines. It used the Bureau of Standards' shortwave time signals. Sync
was
a bit touchy (I eventually replaced the carbon calibration pots with
ceramic), but it otherwise worked very well. It even had an interface
that
allowed your computer to reset its clock each time the machine
restarted.

When I needed money a few years back, I sold it on eBay for something
like
$400, without anyone questioning the price.

If Heath wants to come back as a kit company, it needs to design
products
that have no commercial equivalents.


Heath had an fm tuner with direct frequency entry push button. I never
saw
another for home use, but there may have been another or commercial use.


I think it was GE that had an alarm clock like that in the late 70s. It
was actually pretty cool. It had a little keypad on it.



About that era, Henry's radio had a batch of project pages in their
catalogue - one of which was a digital clock.

I started building it but never got around to finishing it. Usual excuses;
can't afford the next lot of parts, by the time I got around to it the parts
had become obsolete etc.

The project was ongoing for many years and the parts added to it depended
where I was working at the time!

Pretty sure I still have the board in a tea chest at the back of the garage
somewhere.