On Wed, Jan 7, 2009 at 6:52 AM, David M. Witten II <[email protected]> wrote: > James R. Gorr wrote: >> Have you been able to RX WWVB with it (even if you haven't written anything >> to decode it)? > > No, I haven't had time to make one work. It seems like a nice little > package, but how useful and for what purposes I am not yet certain. My > curiosity just got the better of me (again). The device produces a > pulse train that encodes the WWV information.
It's super-easy to get bits out. (component side up, solder pads on the bottom edge) [1][2][3][4][5][6][7][8] 1) GND 2) VCC 5) GND 6) OUT 7) ~OUT pin 5 is the enable/power-on pin. ground it to turn the module on. then you get bits on pin 6 and 7. >> I wonder what the no CPU means? > > That worried me too. I read the manufacturer's information and it seems > that this is sometimes used with an Epson 4 bit CPU. But any CPU/MCU > should be able to do the job. A small PIC or AVR should be able to > handle it easily. I have one of these modules connected to an arduino (AVR)... for the moment i hacked up an ugly little logger that just samples at 100Hz, toggles the LED and prints the samples. I need to spend some quality time with the manual and read about input capture. > There is an article in the November '08 Circuit Cellar Magazine that > uses this module with a Freescale DEMO9S08QG8: http://www.projects-lab.com/?p=719 ftp://ftp.circuitcellar.com/pub/Circuit_Cellar/2008/220/Nickels-220.zip > The article gives some details of decoding, but I don't have Freescale > tools and have a satisfactory (better) NTP server, so I won't duplicate it. searching for "AVR WWVB" and "AVR DCF77" turned up some leads. http://www.ringolake.com/pic_proj/WWVB/wwvb.html http://www.mulder.franken.de/ntpdcfledclock/ http://www.embedds.com/neat-binary-dcf-77-clock/ ... -- GDB has a 'break' feature; why doesn't it have 'fix' too? _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
