On 1/10/12 8:02 AM, Ron Schuster wrote:
I'm using the same circuit but I have these resistor values: R1 = 33k,
R2 = 220k , R3 = 2.2k. I don't remember where I got those values from
originally. I'm sure I just copied them from someone else's schematic.
I guess the exact values are not all that critical, but I just
wondering if there is a way to calculate what the "best" values would
be.
I think you're trying to make the circuit in figure (a), below:
http://threeneurons.files.wordpress.com/2011/08/anode_nixie01.gif
Those resistor values look familiar to me, as I used them in my nixie
clocks successfully. They work only if the second transistor is a PNP type.
--
David Forbes, Tucson AZ
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