I mean to try this on a device I'm building, but won't an H-bridge driver do ?
It will provide an average potential of half the drive voltage giving the ability to place a grid or anode at a small negative potential, and if the filament requirement is less than the easy 5V it can be reduced using PWM by floating the H-bridge. Higher or lower average acceleration voltages can be accommodated by setting both ends of the filament to 0 or 5 during the off-period . On Fri, Aug 20, 2021 at 10:51 PM Dekatron42 <martin.forsb...@gmail.com> wrote: > There is a nice article in NutsVolts magazine: > http://www.nutsvolts.com/media-files/Forum-Articles/QA_201110.pdf where a > powerful driver is shown, needs a small transformer but seems to be well > designed with equations for calculations of the transformer. > > /Martin > > On Friday, 20 August 2021 at 21:37:46 UTC+2 Hannah Mishin wrote: > >> Theres a section on filament driving in my blog here: >> >> https://hannahmishin.com/blog/2017/4/30/russian-tri-color-vfd-indicator-clock >> >> *Hannah Mishin* >> * She/her/hers* >> <http://hannahmishin.com/> >> >> *hannahmishin.com* <http://hannahmishin.com/> >> >> >> >> On Fri, Aug 20, 2021 at 1:48 PM Toby Thain <to...@telegraphics.com.au> >> wrote: >> >>> On 2021-08-20 12:58 p.m., Paul Andrews wrote: >>> > I'm designing a clock for DT-1704 tubes and am stumbling at the >>> filament >>> > drive stage. They want 1.6V. I want to power it from 5VDC. ... >>> > >>> >>> FWIW I've used LM2575 1A adjustable step down for DC filament voltages >>> in that range. >>> >>> --Toby >>> >>> >>> > ... >>> > >>> > So I would appreciate any suggestions for what direction I should take >>> > here. I have too many options and no clear criteria. >>> > >>> > -- >>> > 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 neonixie-l+...@googlegroups.com >>> > <mailto:neonixie-l+...@googlegroups.com>. >>> > To view this discussion on the web, visit >>> > >>> https://groups.google.com/d/msgid/neonixie-l/860d4d78-c807-415e-a740-b576a4b5d18cn%40googlegroups.com >>> > < >>> https://groups.google.com/d/msgid/neonixie-l/860d4d78-c807-415e-a740-b576a4b5d18cn%40googlegroups.com?utm_medium=email&utm_source=footer >>> >. >>> >>> -- >>> 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 neonixie-l+...@googlegroups.com. >>> To view this discussion on the web, visit >>> https://groups.google.com/d/msgid/neonixie-l/ce44816f-120e-abae-060f-fe062d24f836%40telegraphics.com.au >>> . >>> >> -- > 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 neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/a540fc31-ccde-4686-9c05-06a3c234c19dn%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/a540fc31-ccde-4686-9c05-06a3c234c19dn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CALiMYrtALXbeSY4BwyzetUyrSF704igiPh2JX_xzJ9u8F%2B3T9A%40mail.gmail.com.
