I need an inexpensive wall clock that runs on a single battery, AA or AAA. And auto updates the time.

[shortylickens]

This is almost good enough, but needs too many AA's.

https://www.amazon.com/Crosse-Technology-WT-8005U-B-Digital-Temperature/dp/B002BDV8DC

It does not need a backlight obviously. Does not need alarms or multiple times zones or anything else. Just the time. Auto-updating.

 

[mindless1]

I think most of the digitals use at least 2 x AA or AAA, how about this:

https://www.amazon.com/Crosse-Technology-WT-3102S-Silver-Atomic/dp/B000AMCAUG

Why is 1 x AA important? I'd just toss a couple LSD, NiMH rechargeables in, will probably run over a year before they need recharged again, OR just not get atomic, considering non-atomic can run closer to 5 years (longer still if a simple LCD display with no backlight) and daylight savings changes will be ending fall 2023.

 

[snoopy7548]

Uses 1 AA battery:

https://www.amazon.com/Stilnovo-G132810BLACK-Giant-Watch-Clock/dp/B01NC2ZXWT/ref=pd_lpo_1?pd_rd_i=B01NC2ZXWT&psc=1

 

[Lost_in_the_HTTP]

The kicker will be the radio for the time updates. They use more juice than the rest of the clock and they need access to the signal. I have a couple that don't update regularly because they can't get the signal. WWV is very low power.

I'm not a fan of smart stuff, but this might be one of those things if you can find one that updates over the web instead of the radio.

 

[Greenman]

It's more than passing odd that two AA's is the deal breaker. Is there some reason for this?

 

[Red Squirrel]

Most micro controllers and other IC chips run at 3.3v or 5v so might be hard to find something that runs on a single AA as it's an extra step having to have a boost controller built in.

I think they do make analog wall clocks that use GPS though, so that might be an option. Didn't find any when doing a quick search though but if you search deeper might find one.

 

[sdifox]

Yeah no, one AA doesn't have enough power to do all you are asking the clock to do.

 

[shortylickens]

OK, I'll give in and get cheap atomic clock that needs 2.
I have to get several of them for the giant VFW hall and everybody who works there is too lazy to manually update the clocks. I wanted single AA or AAA because they are also cheap and dont like buying them. Maybe I can get a case of cheap ones from Costco or somewhere.

 

[sdifox]

Wht not just ac powered?

 

[shortylickens]

Wht not just ac powered?

no convenient outlets. and if they are too cheap for an extra AA, you can be damn sure they arent paying to drill and run wire and patch up walls.

 

[IronWing]

It’s a VFW hall; just set the clocks to ten minutes to bar time and leave the batteries out. They’ll sell a lot more beer.