I thought so too, but I’m thinking that the regulated HV pulses from one power supply may impact the feedback resistor(s) on the other power supply, potentially messing up the feedback loops on both sides.
I could add a HV diode such that current doesn’t flow from one power supply into the top resistor of the feedback divider from the other power supply, if it makes any difference at all (drop out voltage is tiny anyway). > On 19 Aug 2022, at 23:28, Moses <[email protected]> wrote: > > If the voltage from both supplies are about the same and the resistors on the > tubes are the same.. the brightness will be about the same. I don't see how > there would be a difference. > > Regards, > -Moses > > On Friday, August 19, 2022 at 3:12:00 PM UTC-7 [email protected] wrote: > Hello, > > As mentioned in one of my previous posts, I'm building a nixie clock with > Dalibor's RZ568M tubes. > > The idea is to make the base as thin as possible and to achieve that I am > using two power supplies, each with a transformer that is about 6mm tall. > > If I build a clock with 6 tubes and 2 colons, I can allocate 3 tubes + 1 > colon to each power supply and the brightness is nicely balanced. > > If I build a clock with 4 tubes and 1 colon divider, then I am not sure if I > should allocate 2 tubes + 1 colon to a power supply and 2 tubes only to the > other power supply. If I do so, the brightness in the 2 tubes only will be > different than in the 2 tubes connected to the colon. I could use PWM to > adjust brightness but let's assume that I just do direct drive with no PWM. > > I thought, is it possible to put two HVPS in parallel as you'd do with the > batteries to increase overall current for a higher load? I don't think that's > possible with DC/DC boost converters as it messes up the voltage on the top > resistor of the voltage divider/feedback loop. I can always try and > experiment but wanted to hear any suggestions before frying two power > supplies. > > I have built a larger power supply that can take all 6 Nixies etc but the > transformer is much taller of course, so I am not using that one. > > I could add a third mini power supply just for the colon, but it seems > overkill to have 3 power supplies! > > Any thoughts? > > Thanks, as always. > Max > > -- > 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] > <mailto:[email protected]>. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/28dc3079-a49a-4fdb-aa23-03ecaaf82037n%40googlegroups.com > > <https://groups.google.com/d/msgid/neonixie-l/28dc3079-a49a-4fdb-aa23-03ecaaf82037n%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 [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CADC1348-4297-46F7-AB9F-4119438D5078%40gmail.com.
