I have made up some driver PCBs for IV18s, using an Eagle part from the Adafruit library. (See attached, if Google hasn't eaten it.)
There is some confusion when every pinout I find shows 22 pins - but the actual tube only has 19. Are the pins I see in Dieter Waechter's datasheet marked 'not connected' in reality not actually there? In an attempt to identify pin 1 - which appears to be at the bottom of the tube in relation to the display, I assumed that only pins 1 and 13 (heater) would show continuity. Pins 1 an 13 do not show continuity - pins 1 and 10 do, further reinforcing my suspicion that 'not connected' is a rather confusing way of saying 'missing.' If pins 6, 7, 8 are actually gaps 6, 7, 8 (I notice the pitch of the pins on the front of the tube are less than at the rear) then I think I may need to re-hash the part library, as putting pads/holes on a PCB with nothing to go in them is, well, confusing! Or are there two variants of the IV18 - one with unconnected pins, one with no pins? Then I have the fun figuring out how to get hardware SPI to send 20, not 24 bits to the MAX6921 :-) (I'll probably bit-bang it.) -- 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/msg/neonixie-l/-/01sskcGmQwgJ. For more options, visit https://groups.google.com/groups/opt_out.
<<attachment: iv18board.png>>
