Thanks for your reply. That is an excellent transformer indeed.
I have made a custom version of it, slightly smaller, it goes up to 100mA (gets a little warm but not much) and can comfortably take 70mA too. It can comfortably take 6 RZ568M nixies made by Dalibor. I am now looking at the Taylor’s transformers, I believe Dalibor uses them in his 6 digit nixie clocks so I was curious to build the same power supply (just for fun, they are so cheap that it’s easies to buy them). Such power supply use a coupled inductor, which is interesting and impressive at the same time as 1 power supply can indeed support 6 large RZ568M, it seems. I have tried with 4x RZ568M and Taylor’s power supply gets warm more than I’d like so I’ll look to review the spec of the coupled inductor. The power supply I have built using LT1619 works well with my custom transformer, but this idea of using a couple inductor may work well while saving a few millimetres of space. If anyone has experience with the maths of coupled inductors, please let me know. > On 3 Oct 2022, at 13:39, newxito <axta...@gmail.com> wrote: > > I use a flyback design based on a schematic from the LT3757 datasheet. The > version I made for the calculator goes up to 70 mA. Since this project only > needs max. 40mA, I use a 50mA fuse. > The efficiency is quite good (>90% from 30 to 70mA), so no problems with > heat. > > <PSU.jpg> > > flata...@gmail.com schrieb am Montag, 3. Oktober 2022 um 12:08:06 UTC+2: > Just curious, what is the power of the high voltage power supply? I suppose > you need 35mA but really at least 60mA to avoid any heating issues? > > -------- Original message -------- > From: Adrian Godwin <artg...@gmail.com > <applewebdata://E9596CD3-F4EE-4607-A272-12CE339E2436>> > Date: 03/10/2022 10:46 (GMT+00:00) > To: neoni...@googlegroups.com > <applewebdata://E9596CD3-F4EE-4607-A272-12CE339E2436> > Subject: Re: [neonixie-l] Re: 14-digit nixie calculator project with clock > function > > I used to work on Canon machines for my father's business in the '70s. They > were mostly 12 or 14 digit. > I wonder why they used so many digits in an era when they were so expensive ? > 8 or maybe 10 seemed to be enough in the LED era. > > > On Mon, Oct 3, 2022 at 9:39 AM Dave ZL3FJ <2c...@silverbears.nz > <applewebdata://E9596CD3-F4EE-4607-A272-12CE339E2436>> wrote: > Good work-very space age looking. > > But here’s a Burroughs original - all 16 digits of it….. from the 1960s, IIRC. > > DaveB, NZ > > > > From: neoni...@googlegroups.com > <applewebdata://E9596CD3-F4EE-4607-A272-12CE339E2436> > [mailto:neoni...@googlegroups.com > <applewebdata://E9596CD3-F4EE-4607-A272-12CE339E2436>] On Behalf Of newxito > Sent: Monday, October 03, 2022 20:59 > To: neonixie-l > Subject: Re: [neonixie-l] Re: 14-digit nixie calculator project with clock > function > > > > No worries, this is a strictly limited edition, this thing is serial number 1 > of 1 :-) > I cheated a little bit; I just modified the original case and connected the > display part with a metal tube. > > -- > 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 > <applewebdata://E9596CD3-F4EE-4607-A272-12CE339E2436>. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/2f3a95ac-b6d1-4ca2-b956-5b063aeab739n%40googlegroups.com > > <https://groups.google.com/d/msgid/neonixie-l/2f3a95ac-b6d1-4ca2-b956-5b063aeab739n%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 > <applewebdata://E9596CD3-F4EE-4607-A272-12CE339E2436>. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/008901d8d703%2495d07510%24c1715f30%24%40silverbears.nz > > <https://groups.google.com/d/msgid/neonixie-l/008901d8d703%2495d07510%24c1715f30%24%40silverbears.nz?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 > <applewebdata://E9596CD3-F4EE-4607-A272-12CE339E2436>. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/CALiMYrsWzmVYiiOYo9_9KBRO6U9ahQ7kjNLjipS-wX82N-jHkg%40mail.gmail.com > > <https://groups.google.com/d/msgid/neonixie-l/CALiMYrsWzmVYiiOYo9_9KBRO6U9ahQ7kjNLjipS-wX82N-jHkg%40mail.gmail.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 > <mailto:neonixie-l+unsubscr...@googlegroups.com>. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/172875b7-1418-481e-804a-7c23e7329333n%40googlegroups.com > > <https://groups.google.com/d/msgid/neonixie-l/172875b7-1418-481e-804a-7c23e7329333n%40googlegroups.com?utm_medium=email&utm_source=footer>. > <PSU.jpg> -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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