On 23 lis 2011, at 18:26, Adam Jacobs wrote: > I built a direct-drive clock with Moses' chip years ago with IN-8's. It turns > off for about 12 hours out of each day using only the blanking feature on the > 74141's. I don't notice any glow, the tubes seem to turn very cleanly "off". > It might be because I used the soviet 74141's, though.. or maybe it only > works with specific tubes. > I agree with David, the cleanest solution would be to simply turn off your HV > supply. >
I do have the soviet 74141s — could it be that they are different (don't have the zener diodes) from the 74141s made elsewhere? 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. --J. > On 11/23/2011 8:22 AM, Jan Rychter wrote: >> I'd like to be able to periodically switch off my nixies in order to extend >> their lifespan. I have a non-multiplexed direct-drive circuit with 74141s >> driving the nixies. I've been wondering - is it enough to keep the 74141s >> switched off, or do I need to build in a circuit that will remove the anode >> voltage? >> >> Normally I would just leave the anodes powered and there should be no >> current flowing, but nixies and high voltages are not something I understand >> very well. >> >> --J. >> > > -- > 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. > -- 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.
