Austin is fortunate to have a lot of great vintage shops (here's a handy map). I love these places as you never know what you might find inside - furniture, clothing, records, magazines, and other tchotchkes. But it can be anything that catches a picker's eye. A few weeks back we stopped by the North Loop Spring Fling sidewalk sale (which had about double the normal volume of sellers and treasures). While my wife was looking through the usual fare, I spied this propped up against the wall:
Chronomix CC2000 Details
It's a big 4-digit 7-segment display used to keep time at sporting events (track meets and the like). In this case the segments aren't LEDs, they are fluorescent panels with actuators to rotate them into view with a solid clunk. Yes, it works. Yes, I bought it immediately. Here's a video of the precision clunking action:
Before I can control the clunking (like this pinball score reel project), I needed to learn as much as I could about those two connectors on the right side. Unplugging the control module didn't affect the counting, so the timekeeping intelligence is inside. Before I started taking it apart, I googled around for anyone else using this in a project (or taking it apart). Unfortunately, the iFixit guys haven't gotten their hands on one of these yet.
The Chronomix website wasn't much help either - apparently they were purchased awhile back, and no longer sell or support these older units. However, their FAQ did mention that former employees started a company to repair old units. So I emailed and asked for a manual, why not?
A week later, I had an original yellowed paper copy of the manual in the mail from Expert Timing Systems in Grants Pass, OR. The best part - the 3-pin connector is an RS-232 port (1200 baud!!) meant to allow external control. This drawing from the manual covers it nicely. Now to make a little cable adapter and I'll be up and clunking in no time!