Hi, if anyone is interested, here are the results: yes, you can PWM IV-6 filament directly from 5V. I tweaked a bit arduino analogWrite() by setting prescaler to 1 (thus changing PWM frequency from ~4kHz to 32,5kHz) and set PWM to really low duty cycle (max 10/256, which is around 4%). I didn't feed the filament directly from pin, I made a simple MOSFET switch - it has low RDSon, so we can simplify it to having 5V directly on filament.
Tests are positive, on 10/256 the filament is visibly hot (but far from being overdriven and burning), and stops being visible at 8/256. Applying voltage 25V higher than cathode on all anodes+grid correctly lights up all of them, they look identical to directly heated filament one. -- 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/e79e1446-cdf1-4db0-b366-65e63697589d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
