Bill, I just read the article on nuts and volts, looks nice!
I must have misread the IV-9 datasheet initially.. I didn't see it listed values up to 4.5v. The 3.15v it refers to may just be a mid point nominal value or something. Looks like you are driving the tubes at 5v. The optional jumper with the diode is a nice idea. Regards, -Moses On Sunday, November 20, 2022 at 9:36:30 AM UTC-8 Bill van Dijk wrote: > > > 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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/b78ad3e9-796d-4bbf-a538-e5eba6060c2fn%40googlegroups.com.
