Hi again Zitt... All of the changes seem for good... but just for the sake of simplicity... did you try with only a pull-up resistor to the U3A inputs to see if you could bring the levels to CMOS ones? Actually, CMOS with 5 V levels are fully compatible with TTL ones, but when one wanted to be sure, a pull up to Vcc did the trick.
Regards Gaston On Friday, April 12, 2013 2:14:31 AM UTC-3, Zitt wrote: > > Updated schematics are posted here: > > http://www.Pinball-Mods.com/blogs/wp-content/uploads/2013/04/Bally7NixieFabB.pdf<http://www.pinball-mods.com/blogs/wp-content/uploads/2013/04/Bally7NixieFabB.pdf> > > Fab B changes: > > - Changes around D[5..7]; > - reworked for transistor inverters with pullups. > - U3A rewired to enable proper output with inverted signals. > - U4 I5 & I6 pull from Q1 & Q2 outputs instead of main connector so > that cmos levels are observed at input of U4. > > -- 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/-/VOXociKKkM0J. For more options, visit https://groups.google.com/groups/opt_out.
