On 6/22/2012 2:52 PM, [email protected] wrote:
I bought one of Threeneurons (mike?) dekatron spinner kits to play with
some ideas. I'm new tubes in general. Anyway, the dekatron puts out about a
50-60 volt "pulse" at NDX. I am trying to drop that closer to 5v but at
least less than 10v. I tried using a voltage divider made of 2 resistor
going from the NDX output to ground but this stops the dekatron movement.
Can anyone offer some advice.
BTW I am powering this from a +12/-12 DC power supply using +12 and ground.
I'm not using the -12. Not sure if it can be useful in any way but I
thought I'd mention it.
What resistor values did you use? The circuit is high impedance, so you may
have reduced the pulse size enough to break it by loading it with your resistor
divider.
Try with a 1 megohm resistor to the dekatron and a 100k to ground. The pulse
will not be sharp, but it ought to be there.
The output of that divider will need to go into a CMOS device so as to not load
down the divider.
--
David Forbes, Tucson, AZ
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