While in Tokyo, I shopped at the world famous Akizuki Denshi, a small electronics shop that sells, amongst other things, fabulous kits. On the chart for this weekend: a PIC chip programmer (photo of my kit, assembled, including the 4.0 upgrade) that I’ve been needing for a while, and a JJY clock receiver (Peter Evans’ assembly, photos and translation). There’s one modification to the kit I made: rather than directly choose the polarity of the DC jack via hard-wiring the jumpers on the lower left, I used a bit of a pin header I had left over from the JJY clock receiver kit and some leftover 2-pin jumper blocks from my PC. (It’s unfortunate they didn’t do what Tristate did with their JJY receiver, where a rectifier is used to accept either polarity of DC voltage input. Ah well, it keeps the component count and cost down, I guess.)
Now, I’d wanted the JJY clock receiver to run off of WWVB, the similar station broadcasting out of Colorado, and to set up an NTP stratum 1 server for my house. So I bought a 60kHz ferrite antenna and 2 60kHz crystals to run the thing. I built it up yesterday, and powered it up, only to realize that the signals have some differences in both their encoding and their bit patterns.
So, sooner than I’d been expecting, I built up the PIC programmer so I can reprogram the JJY clock receiver to understand WWVB. Rewriting the code will be my project for this week; it’s reasonably straightforward, but this is my first taste of PIC code. At a glance it looks very 6800-esque, with some reminiscence of 6502 (naturally). I think I’ll enjoy PIC assembly. ^_^
I’ll post a photo of the JJY … er, WWVB receiver once it’s working.