Thanks, this works perfectly for me about wwvb HOT 4 CLOSED

Great news! So i can add it to my very small 'IT WORKS!' list, what clock are you using?

Funnily enough, i dont actually have a wwvb clock - this all started as a 'quick' project to help out a mate (@mr-sneezy)

Sneezy is using a loop antenna in this video (@mr-sneezy youtube vid). He 3D printed a bracket for the antenna - ill have to get him to add it to this project. Loop antennas are very broad band and easy to get working. I would use one instead of an end fire antenna like you describe. we have gotten it working using 5 or so loops about 10cm diameter. You don't need that circuit with a loop antenna, just inline a led (or 10k resistor). I.e. WWVB out => loop => +led- => ground. The led or resistor acts as a current limiter.

from wwvb.

Hello Mark,
The clock I'm using is a really old one. It's notorious for not picking up Colorado.

Equity by La Crosse SkyScan 31269 LCD Atomic Alarm Clock
https://www.amazon.com/dp/B0001MHL1S/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=1X3TWXSCTQ0DI&coliid=I25OATSH4W0S4Q

I have a second clock I'm also going to test with to see if that one works.
La Crosse Technology WS-8418U-IT Atomic Digital Wall Clock with Moon Phase
https://www.amazon.com/gp/product/B0016MYATS/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

This second one picks up the signal from Colorado just fine, but it was in the other room and the signal from the arduino was not strong enough to set this clock.

I will work on your suggestions about the antenna and see if it improves my signal.

There were a few lines in the code related to Calibration, should I do anything with that? or is that for special cases?

Thanks.

from wwvb.

Thanks for the info!
The calibration data is there for the 60kHz carrier. In short, if your clock is syncing you don't need to modify it. I found the the register values needed to generate the 60kHz depends on the processing load and chip type.

Another thought with the antenna, an rfid antenna at 125kHz should work.
@mr-sneezy design : http://www.thingiverse.com/thing:1358090
His design works out to a couple meters, so not a huge range but better than cm's, but i could probably design an amplifier circuit if you want greater range. It should only require an op amp, some diodes and capacitors. If you have a negative supply it simplifies the circuit i have in mind.

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Alrighty - im closing this down 👍

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