On Jun 22, 4:23 pm, David Forbes <[email protected]> wrote: > 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
Thanks! this worked on the lower speeds but was still freezing at higher speeds until I adjusted the PW resistor in the neon relazation oscillator and now all works as I'd like it to. -- 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.
