> I do have the soviet 74141s — could it be that they are different (don't have > the zener diodes) from the 74141s made elsewhere?
IIRC, they are different, but both have zeners, just different voltage zeners. The US 74141s have 60V zeners, the soviet ones have 100V zeners. And that's enough to make a difference. > My HV supply will be on a separate board, so turning it off isn't that > obvious, but perhaps I'll redesign it to incorporate an "HV enable" pin. The > simplest solution seems to be to implement a common driver for all the anodes > with a MPSA92/MPSA42 pair. A single MPSA92 should have no problem driving 6 > nixies. Yeah, an enable pin would be nice, but a common anode driver will work too. Instead of the transistor pair, you could use an optocoupler - an ordinary TLP371 will switch 300V and can handle 150mA. I'm fond of 'em for multiplexed designs, due to their soft turn-on, easy use, and isolation, but one would work fine just as an HV switch. - John -- 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.
