I found that with no load, switching power supplies can swing wildly. -joe
On Thu, Sep 4, 2025, 9:45 AM Nick Andrews <[email protected]> wrote: > You may need a higher impedance meter to measure high voltages, especially > low current supplies as the typical meters will pull the measured voltage > down. If you use a 1 GOhm resistor to make a voltage divider, it's much > easier to measure high voltages more accurately on these tiny supplies. > > On Thu, Sep 4, 2025 at 2:34 AM 'JBro63' via neonixie-l < > [email protected]> wrote: > >> Hi all. >> >> I'm looking to incorporate a 12v -> HV power supply in to a PCB design >> rather then use the excellent external 6300/8200 Omnixie's. As a starter, >> have sourced the components for the threeneurons NK02. The only change was >> replacing R5/RX with a single 9.1k resistor. >> >> Once assembled (all components soldered) it seems to work ok - lights up >> a neon or nixie as expected. I'm unable to get a reliable reading of the >> output voltage using a multimeter, the values are all over the place >> sometimes exceeding the 600v max of the meter which concerns me a little. >> >> Anyone have any tips or insights on this behaviour? >> >> The NK02 design is from this >> <https://threeneurons.wordpress.com/nixie-power-supply/hv-supply-kit/> >> page. >> >> Thanks. >> >> -- >> 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, visit >> https://groups.google.com/d/msgid/neonixie-l/e0176390-9db5-4a88-bf6b-5d25043707c6n%40googlegroups.com >> <https://groups.google.com/d/msgid/neonixie-l/e0176390-9db5-4a88-bf6b-5d25043707c6n%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, visit > https://groups.google.com/d/msgid/neonixie-l/CAJD4P-jVB_q_TSMGpHwLmvcxaGQGTZ_t%3D3VyPEW_cLsG_nS%3DsA%40mail.gmail.com > <https://groups.google.com/d/msgid/neonixie-l/CAJD4P-jVB_q_TSMGpHwLmvcxaGQGTZ_t%3D3VyPEW_cLsG_nS%3DsA%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 [email protected]. To view this discussion, visit https://groups.google.com/d/msgid/neonixie-l/CAE%2BVk6OCyxTrti%3DQyi-Bh07C1dbdb_Qi7w7_Jiza%3DHrX0r1oqw%40mail.gmail.com.
