Hi. Being a Nixie-hoarder for many years, i’m actually guilty of not having a working clock at home. The only clock i have working is sitting in the local hackerspace. It’s an direct driven design and have been working perfectly for about 6 years now.
As i have a million “real” projects that i am working on, ii’m pretty sure that getting the time to design a clock “properly” isn’t just around the corner. On one of those late-night shopping-sprees i came across this board: http://switchmodedesign.com/collections/arduino-shields/products/open-source-nixie-tube-shield-cut-jump-pcb <http://switchmodedesign.com/collections/arduino-shields/products/open-source-nixie-tube-shield-cut-jump-pcb> and ordered 2 pcs. I “trusted” the website-name (switchmode designs) as the board being designed by one that knew what he was doing, so i didn’t check schematic or board layout before i had the boards in hand …. Maybe i should have done that, because that switcher is the worst design i have /EVER/ seen. Anyway, apart from that, it works ok-ish. I wanted to use this board as a “backend” for my own board with tubes. I quickly whipped up a board for 4 IN-4’s: https://www.dropbox.com/s/dsk1hv2xly7e9v2/Nixie.png?dl=0 <https://www.dropbox.com/s/dsk1hv2xly7e9v2/Nixie.png?dl=0> https://www.dropbox.com/s/yn42qtdki3vr7bo/Nixie2.jpeg?dl=0 <https://www.dropbox.com/s/yn42qtdki3vr7bo/Nixie2.jpeg?dl=0> It’s a milled PCB so that’s why the copper is left around the tracks. Now i am having this stupid problem - ghosting! No, it’s not software ghosting, because if i only connect a single tube with two wires (the wide cable isn’t connected) , sometimes the neighboring tube lights up, too. So somehow the tubes being connected only by the cathodes and the anodes floating, powering one can excite the others. I even removed the pins for the tubes so the anode pins of the unused tubes is not even touching the fibreglass-material. Only cathodes is thouching. (anode-pin connected by flying wire to anode resistor and driver) https://www.dropbox.com/s/y0xhc9gazrxa120/nixie3.jpeg?dl=0 Is there anything to do here, or should i scrap the boards and design my own direct-driven circuit? // Per. -- 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 post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/4F3B5E68-F3D9-4687-91C7-917F44DD4AF3%40gmail.com. For more options, visit https://groups.google.com/d/optout.
