Thanks John, I would never have figured that out!
For anyone else reading this thread in the future here's a link that discusses what John mentions above. I found it using the new knowledge (pull down resistors) from John's post. http://www.msilverman.me/2010/06/z573m-nixie-tube-and-arduino-counter/ Thanks again. Steve On Oct 20, 7:24 pm, John Rehwinkel <[email protected]> wrote: > > My reasoning is that with no power to the BCD inputs that I am in > > effect encoding zero, so the zero pin should be sinking current. > > Nope - this is TTL logic, which has to be pulled down to zero, otherwise it > floats to (sort of) 1. So you've got all ones input, which will blank the > digit (not drive any cathodes low). Pull the highest bit ("8" or "D", pin 4) > to ground, and the "7" digit should illuminate. Note that you'll want an > anode resistor too, or the nixie will try to suck your power supply down to > its maintaining voltage, and that contest will likely only bring grief, no > matter which one wins. > > > Ground is ground right? Are all grounds considered equal? > > While it's possible to have separate high voltage and low voltage grounds, > there's no particular need to do so. > > > I notice > > both my power supplies have separate ground pins coming out of them > > over and above the ground pin for the power going in. Why wouldn't > > these just be wired together on the power supply's circuit board? Why > > do they supply another ground pin? > > They probably are wired together, unless that power supply has a floating > ground for the high voltage output (most don't). > > - John -- 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.
