7/25/2023 0 Comments Tooth fairy letter template![]() ![]() I've been using this thing for several years now, and haven't had any problems. So, I kept the supply limited to about 150-170 volts and the open circuit voltage on the cathodes never went above the chip's rated voltage. FYI, the A6818 chip (see attachment) that I used were only rated for 60 volts, but I was using IN-16 nixies which work quite well with a 150 volt supply. Interestingly, I found that if one cathode was grounded it would change the open circuit voltage on adjacent cathodes a bit, sometimes higher and sometimes lower, but not enough to cause problems. I never measured more than about 70 volts on any cathode. ![]() I connected a HV supply to the nixie anode (through a 27k current limiting resistor) and with the cathodes open circuited, I measured the cathode voltage with a high impedance (several hundred megohms) multimeter. So, I did some measurements before I committed myself to the HV driver chips. I questioned this myself when I built mine.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |