Thanks Jon, I will give it a try on the breadboard. Jon schrieb am Dienstag, 16. September 2025 um 03:14:43 UTC+2:
> It's a current-stealing effect. If you search the old archives of the > group you'll find that Pete Hand identified it and also proposed the use of > a single transistor constant current sink driver as an alternative to the > decimal point cathode resistor. I encountered the problem when developing > my Niximatrix clock that uses IN-12B, and experimented with the current > sink driver per his recommendation - it works a treat. > > Jon. > > > On Friday, September 12, 2025 at 3:21:23 PM UTC+1 Jarod Findley wrote: > >> Its looks like your voltage or amperage is high try cutting it back a few >> volts or a miliamp >> >> On Fri, Sep 12, 2025, 7:45 AM newxito <[email protected]> wrote: >> >>> I have the problem with all my IN-12B... >>> >>> Schematic of the display: >>> https://github.com/axtar/Nixie-Calculator/blob/main/Schematics/Schematic_Nixie_Calculator_IN-12_Display_Rev2.pdf >>> If using the B version I populate the 82K resistors. If using the A >>> version, I populate the neons and the 270K resistors. >>> >>> Schematic of the driver: >>> https://github.com/axtar/Nixie-Calculator/blob/main/Schematics/Schematic_Nixie_Calculator_IN-12_Driver_Rev2.pdf >>> Just the usual HV5622 thing... >>> >>> What resistor values are you using for your Bitcoin Ticker? >>> >>> Michail Wilson schrieb am Freitag, 12. September 2025 um 13:13:08 UTC+2: >>> >>>> Something is wrong. >>>> >>>> >>>> >>>> My project (Bitcoin Ticker) uses 8x IN-12B and they (hundreds of tubes >>>> worth) don’t have that issue). I used the 12B since it has a decimal >>>> point >>>> on both sides. >>>> >>>> Have you tried another tube? What’s your project schematic? >>>> >>>> >>>> >>>> M1 >>>> >>>> >>>> >>>> *From:* [email protected] <[email protected]> *On >>>> Behalf Of *newxito >>>> *Sent:* Friday, September 12, 2025 1:09 AM >>>> *To:* neonixie-l <[email protected]> >>>> *Subject:* [neonixie-l] IN-12B decimal point >>>> >>>> >>>> >>>> I was told several times to use IN-12B instead of IN-12A with neon bulb >>>> as decimal point. I finally tried that but I don't like it. Is anyone >>>> using >>>> the decimal point of an IN-12B in a project? When combined with a 3 or 8, >>>> the point is barely noticeable. Another problem I'm having is that it >>>> glows >>>> much brighter when no digit is lit. As soon as a digit is lit, it gets >>>> dimmer. Is this normal or I’m doing something wrong? I use a 15K anode >>>> resistor and an 82K cathode resistor for the decimal point with a voltage >>>> of 170V. >>>> >>>> >>>> -- >>>> 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/613d7d66-dcab-48ae-bd34-a5f714071e72n%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/neonixie-l/613d7d66-dcab-48ae-bd34-a5f714071e72n%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/c9cbf447-021e-4b3f-bf5a-b1871d3c94e6n%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/neonixie-l/c9cbf447-021e-4b3f-bf5a-b1871d3c94e6n%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/c3e0cb37-5559-4ac7-898b-c6eb33182d95n%40googlegroups.com.
