Thanks to westdave for some pointers and to AJ for supplying the tube data, I have a 4 digit NEO-5000 clock going on the breadboard. I'm going to make a PCB for it and, PCB manufacturing being what it is, I'll have extras of course. Does anybody else want one? The PCB will use 4 NEO-5000s (for HH:MM) and one SP-332 (for the seconds). AVR processor, and other peripherals TBD. The plan is to put the displays on the front of the PCB and the remaining components, mostly surface mount, on the back side. The final PCB should be around 11" x 4" (the digits themselves are 2" high).
FWIW, the displays are multiplexed 6:1 (4 NEOs and 2 SP-332 digits). The NEOs run 200V on the anode with 15K cathode resistors. The multiplexing is about 3ms ON and 300us blanking for a refresh rate of about 50Hz. Peak per segment cathode current is about 4mA. I could actually drive 'em harder, but this is within the specs posted by AJ and they're passably bright even at this level. Hopefully they'll last longer this way. If you want a PCB (and have access to the displays!) contact me off list. Bob -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
