Could you clarify something for me? Are you saying is that a 74141 should not be used for cathode-side blanking? What about the Russian K155ID1, which I assume has similar specs to the 74141?
On Feb 28, 7:24 pm, David Forbes <[email protected]> wrote: > On 2/28/12 4:48 PM, Deviantgeek wrote: > > > I was looking at the Supertex drivers, mainly the HV5522. Its 220v vs > > 300v, would that still work? I am driving 6 IN-18 tubes. I was also > > looking at the SN75468, and a few 50v drivers(TPIC6A596)which I think > > is too low... I will be building several clocks, and I want good, > > reliable, cheap drivers. > > > (this is just for the cathodes) > > The voltage required depends on what sort of control you plan to use, > and how many volts you apply to the anodes. The important thing to > remember is that if one cathode is lit, then the other cathodes don't > need more than 50V to turn them off. That's why the 74141 works with its > 55V Zener diode clamps on its outputs. > > If you want to display one or two cathodes in every tube at all times > (no blanking, but possibly fading between numbers), then a 50V driver is > barely sufficient. Or you can use an anode driver to blank the tube. I > use the TD62083 in my Nixie watch, and it works fine. > > If you want to blank the digit with the cathode, then a 100V driver > would be necessary and you'd need to use a power supply below 200V. > > If you want to blank the tube and use a >200V supply, then you need a > higher voltage cathode driver or an anode blanking circuit. > > I think most of the Supertex parts want 12V on their signal lines, so > they are not very easy to use since normal logic uses 5V levels. > > -- > David Forbes, Tucson AZ -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
