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One component radio clock time transmitter
Binary Thermometer 2.0
$5 Pocket Solar Battery for QRP Radio Transceiver
Haven't tied this yet but I'm going to, it's called Poor Man's Tiny Tuner that simplifies the oscillator tuning process with ready-made sketch for attiny. http://forum.arduino.cc/index.php?topic=8553.0 . The author states that the oscillator can be as much as 10% off from the factory, which may explain the inaccuracy issues I had with the Digispark.
Thanks for the tips... Looks like the (or my) Digispark is just too unstable, keeps fluctuating a couple of kHz no matter what I do with the antenna or code values, so I'll probably have to read up on oscillator calibration if I want to stick with the Digispark. The real proof is that my wave ceptor second hand never moves to the W (work/stable) while receiving :-(. Yes, great watch, mine is a Japan model, all titanium with a white face and sapphire crystal - it's gorgeous like a Tag Twin Time but with a ton of features :-).
Hi, I tried this with a Digispark but it wouldn't set my Casio Wave Ceptor Multiband 6 watch - always errors out. The antenna wire is in pin 6 - P1 on the digispark - with 5v from the Digispark 5v pin connected to the antenna near the board - see attached picture. It's definitely modulating at just below 60 kHz as tested with a sperry multimeter that has a hz function, but not sure how sensitive this watch is when the signal is about 1 kHz off. Also not sure if there's any interference from the USB connection itself which is how I'm powering everything. Any ideas why it's not working with a Digispark? I have a bare atmega16 on the way which I intend to try on a breadboard like your project, so hopefully that will work. I'd rather have the USART instead of using softserial and the extra flash space so I can translate gps or ntp time for modulation on the AVR instead of having to use a companion program due to the limited space. Thanks for this example even if you don't have any comments about it not working on a Digispark :-).
Thanks for trying out my code! I have a solar powered wavecepter too. It is the best watch I've ever had. Works flawlessly and never needs batteries. You can always for your signal on a scope just to make sure things looks like the ought to. Also, you might want to try a longer wire for an antenna. The signal is very low, 60khz, and does not get much energy out of a non-resonant antenna. The longer the wire, the closer it will be to resonant and the more RF you will get out. Also, the 60khz is being generated from the on board RC oscillator which can drift. You can calibrate the oscillator to about 1% or so of true value if you need to. See AVR053 from Atmel. Have fun!
24 Hour Binary Clock with Bamboo Case
I'm well on my way to implementing a device similar to this using a Particle Photon that can retrieve the current time via NTP. This article was a big help in that effort. It's pretty much my primary reference, along with the Wikipedia article on WWVB.I would like to point out, though, that the code block for the switch statement is incorrect. Everywhere it says ">> 4", it should say ">> 3". Otherwise, those slots will always evaluate to zero.Thanks!
Build an Electronic Random Character Generator for One Time Pad Cryptography
I was able to build the kit without problem, however, I don't have the instruction sheet and would like to be able to set the time. Can you add instructions for how to set the clock?
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