Greetings,
Since completing my K2 in 2002, I've been working on a
long term, back burner project to design and implement
a nixie tube clock around a Motorola/Freescale HC908.
When I finished the clock, I had two unused pins on
the HC908 that could be used as a serial interface. I
also had room on the board for a TTL/RS-232 converter.
In other words, I had the ability to talk to the K2
I/O port.
I just completed "K2" mode for my nixie tube clock.
When the clock is powered up, it reads two dip
switches and enters 12 hour clock mode, 24 hour clock
mode, or "K2" mode. In K2 mode, it sends an "AI1;"
command to the K2. The K2 then sends its operating
frequency immediately and whenever the frequency
changes. The nixie tube clock uses an FSM to parse
the "IF" messages sent by the K2, extracts the
operating frequency, and displays six digits on the
nixie tubes.
This feature has no real utility, but it seemed like
the geek thing to do. And, it glows!
The project site is at
http://www.tuxcat.com/benjy/nixieclock.html or
view a single picture at
http://www.tuxcat.com/benjy/k2lite.jpg.
Benjy Cline, AC4XO
(If you wish to send me e-mail, use the address
at the bottom of the nixie clock project page.)
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