Please disregard the shield that i am using. It doesn’t exist right now.
On my bench i have a 180V power supply, my board, two wires and a resistor. I tried with 2.5 / 3mA current per tube. Connecting the power supply to the anode-pin (Pin4) on the tube trough a suitable resistor for 2.5mA current and one of the digits to GND. The digit lights up, but some of the positive current leaks into the other tubes, making them light up too. The only common connection between the tubes is the cathodes. As you can see, right now Pin4(Anode), Pin7(Not connected), Pin10(Not connected), Pin13(Not connected) Pinout as per this site: http://www.tube-tester.com/sites/nixie/data/in-4/in-4-sh1.htm <http://www.tube-tester.com/sites/nixie/data/in-4/in-4-sh1.htm> Picture: https://www.dropbox.com/s/7nup6ndsvhjn63i/nixie4.jpeg?dl=0 Am I having these issues because of the tubes being semi-biquinary? // Per. > On 07 Jun 2015, at 14:11, Dekatron42 <[email protected]> wrote: > > I think that you should try to lower the value of the 100k resistor across > the base-emitter of every MPSA92 to say some 10k-22k, they will not be fully > turned off in some instances with the 100k resistor. > > Did you use the correct anode pin for the IN-4? Have look here: > http://www.tube-tester.com/sites/nixie/data/in-4/in-4-sh2.htm , they can be > driven in bi-quinary or normal mode and the anode pins are not in the same > place depending on what mode is used. > > What resistance do you use for the anodes, maybe you need to change that for > the IN-4 to work properly compared to the IN-17? -- 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/9D7F60DE-E7E1-477D-A4A3-39CEC3B9630A%40gmail.com. For more options, visit https://groups.google.com/d/optout.
