Since it's multiplexed, there should be 4 or 5 anodes (and obviously 7 segments) depending upon how the colon, AM, and PM connections are made. I counted 18 pins total, so it's very possible there are individual cathodes for A,M,P,M, and each of the 2 dots in the colon. This is what was done in the SP-151 display I have in my wristwatch.
BTW, the SP-151 is probably an earlier-generation display because it has visible contacts that appear to touch a thin film deposited on the inner surface of the frontal glass. I'm sure the pinout is similar to your Panaplex. As far as identifying the anodes, you will eventually find them by trial-and-error. Just be careful to limit the current to very low values, maybe 100-200uA. Remember there's no need to apply full-rated current (ie, full brightness); all you need is just enough current to see a faint glow to ID the pins. You will inevitably apply ~180V across 2 adjacent segments (which have almost no spacing), so a very high electric field will be present which could damage the device if done for extended time. You'll probably see a blue dot. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/7d36b5cb-6217-470d-a153-b785a0b1697c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
