22 Dec
2007
22 Dec
'07
11:35 a.m.
To actually drive the tubes. you need something that
can handle the volage/current. Use MPSA42 transistors
- they're cheap, about 8 cents each. One transistor
per cathode. Tie the anode of the tube to the power
source of 200v or whatever. Connect each cathode to
the collector of a MPSA42, tie the emitters all to
ground. To drive a segment, drive the base high
through a 33k resistor.
Now if only I could find some nixie tubes... :o)