Greg, the board is hacked on the bottom. It doesn't look good, but it works. The next version will be perfect.
Brightness is definitely related to the batch. The 87s are the best. They are bright at 30v. The 90s are not nearly as bright at 35v or 45v. I'll run them at 45v for a few days to see if they improve. On Wednesday, March 25, 2020 at 7:54:11 AM UTC-4, Mitch wrote: > > The vexing problem I had with this design, is that the HK16K33s I/O lines > are supposed to float on initialization, to change the slave address. But > the inputs to the 74HC04s are held high for the digits, and low for the > segments, so the address would not change. I ended up using a separate I2C > bus for the second HK, and now everything works perfectly. I just have to > build a few more tube boards, and add the rest of the APA106s. > > > -- 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/a2cd09c4-4591-479d-ba17-b96a6a583083%40googlegroups.com.
