Atomic CLock with pure 120v ac?

[[email protected]]

Why do all the atomic clocks require batteries?

Makes no sence that I woul dbuy aclock to not have to reset
the time just so I can play with the batteries instead.

Anyone know of a simple analog atomic (naval time by radio) wall clock that
uses only 120v ac and no adaptor? (Online specs?) Much obliged.

- = -
Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist
http://www.panix.com/~vjp2/vasos.htm
---{Nothing herein constitutes advice. Everything fully disclaimed.}---
[Homeland Security means private firearms not lazy obstructive guards]
[Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos]

 

[Adrian C]

Why do all the atomic clocks require batteries?

Makes no sence that I woul dbuy aclock to not have to reset
the time just so I can play with the batteries instead.

Anyone know of a simple analog atomic (naval time by radio) wall clock that
uses only 120v ac and no adaptor? (Online specs?) Much obliged.

For flexibility of placement, quartz wall clocks have run on batteries
for many years. Having a visible power cable is ugly.

Radio controlled clocks have inherited this design requirement
unfortunately.

USB Power adaptors are pretty small, some not that larger than a plug.
Have a look at iPod or mobile phone accessories. If necessary adjust the
voltage downwards with a suitable series regulator. Single transistor,
resistor, capacitor and a zener should do it.

 

[mike]

Why do all the atomic clocks require batteries?

Makes no sence that I woul dbuy aclock to not have to reset
the time just so I can play with the batteries instead.

Anyone know of a simple analog atomic (naval time by radio) wall clock that
uses only 120v ac

Demand for this product is low. Most people prefer freedom of placement
over annual battery replacement.
Clocks that project time on the ceiling usually have AC adapters to support
the power demand. Mine were distributed by LaCrosse and Oregon
Scientific. No idea of current catalog.
and no adaptor?
That's a problem on several fronts. Anything that plugs in the wall
has an additional mountain of testing/certification, paperwork and
development
costs involved. If you purchase an approved/listed wall wart,
all of those problems go away.
Most vendors take that route.

(Online specs?) Much obliged.

- = -
Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist
http://www.panix.com/~vjp2/vasos.htm
---{Nothing herein constitutes advice. Everything fully disclaimed.}---
[Homeland Security means private firearms not lazy obstructive guards]
[Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos]

 

[N_Cook]

Why do all the atomic clocks require batteries?

Makes no sence that I woul dbuy aclock to not have to reset
the time just so I can play with the batteries instead.

Anyone know of a simple analog atomic (naval time by radio) wall clock that
uses only 120v ac and no adaptor? (Online specs?) Much obliged.

- = -
Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist
http://www.panix.com/~vjp2/vasos.htm
---{Nothing herein constitutes advice. Everything fully disclaimed.}---
[Homeland Security means private firearms not lazy obstructive guards]
[Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos]

If you don't want a backlight , how much HF electronic smog/ mains coupling
is available these days in the average domestic situation. Enough to power
LCD and short burst ULF receiver operation ?

 

[Bill Gill]

Another quite valid reason for "atomic" clocks being run from batteries is
that the clocks query the time sources for the exact time during the night,
when signal propagation is best. If the clock loses power during the day,
it needs to reset itself when power is restored, but probably won't be able
to receive a signal strong enough to be able to make a correction of the
time until late at night. Being on battery power solves this problem by
never having a loss of power except when the batteries finally die.

Well, that is true sometimes, but I have had good results replacing
the battery in the middle of the day. The clock normally resets just
fine.

I am very seldom up in the middle of the night to replace the battery.

Bill

 

[[email protected]]

Much obliged. I like the idea of solar, but I doubt it charges well
enough. Tried solar clocks in 1985 and 1990 do dismay.


- = -
Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist
http://www.panix.com/~vjp2/vasos.htm
---{Nothing herein constitutes advice. Everything fully disclaimed.}---
[Homeland Security means private firearms not lazy obstructive guards]
[Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos]

 

[Allodoxaphobia]

Try the Sanyo Eneloop cells; they claim about 85% after a year of
storage, and my experience using them in my camera confirms that.

+1

Jonesy