Instead of using a Nano, have you considered just using the ATMega328 chip by itself? I do this all the time for various projects. You can purchase the DIP-package chip pre-programmed with the Arduino bootloader - just add a crystal and use a TTL-level USB-serial converter and you're in business. (Just use the regular Arduino IDE - such as it is...). The whole chip will run just fine off 5 volts, removing any 3.3V interfacing difficulties.
I looked around a little, and couldn't find the surface-mount chip Atmega328P-AUR (T-QFP package) pre-programmed with the loader, but it's not very difficult to use AVRDude and a serial programmer ($7 or so on eBay) to burn the loader, then you're all set. I *completely* understand the space constraint you're facing, although your available depth can be pretty large (at least 2 inches); using the surface mount might make sense for this. ~~ Mark Moulding On Monday, September 3, 2018 at 4:21:08 PM UTC-7, Thomas Kummer wrote: > > The schematic is for a Nixie boost gauge. Using IN-17 Nixies, and an > Arduino Nano. The second schematic is for two NE lamps for Boost and > vacuum. The NE lamp on the first schematic is the decimal place. > -- 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/msgid/neonixie-l/d3883c12-df6f-4f32-baa2-386c373d94cb%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
