I made an IV-9 based clock some years ago which was featured in the Nuts & Volts magazine September 2016. I used 4511 BCD to seven segment decoders with latch function to drive the tubes directly. An HC164 shift register is clocked by a mpu to make sure the data gets to the correct tube. The tubes therefore are not multiplexed, and the whole thing can drive as many tubes as you want with only one 8 bit port. There are a few hundred of this clock in circulation, and after 6 years I am starting to see the odd tube failure aside from a couple of “infant mortalities”. Below is an excerpt from the schematic showing the part related to the tubes. JP1 is simply a way to lower the voltage of the tubes by 0.7V if so desired.
-- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/009c01d8fd06%249d821a10%24d8864e30%24%40gmail.com.
