So I found an elevator control panel in the garbage. They were replacing a broken one in the dorm next to mine. It appears to have 425A5 'touch tube' trigger tubes instead of mechanical switches. I saw an old thread here about them which had a bit of info. I think you need to connect a 150vac supply between ground and the cathode, then 135vdc across the anode and cathode to use them as a touch button. There needs to be some resistance in series with the tube of course, and the 135vdc needs to be isolated from the ac. Also, I think the trigger input needs to be tied to the cathode somehow.
I still have all the wiring in the panel as it was when I found it. There are 12 floors and a basement, so I'm thinking the buttons can represent the hour of a clock as well as an am/pm light. Furthermore, for setting the time, the tubes can still be used as buttons to type in the time. I'd appreciate if I can get some tips on driving circuitry and supplies since these are cold cathode neon tubes, something I have never dealt with before. -- 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/bbce197d-03c5-4883-9514-929ea396408a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
