On Feb 27, 11:21 am, Cobra007 <[email protected]> wrote: > In short, > > Take a look at Geert's clock here:http://www.dos4ever.com/geert/geert.html > > Now, I do not know Geert but it seems to me he knows quite well what > he is doing. Check the HV power supply he uses for his clock and > estimate what the DC voltage will be.
...and he explicitly uses 400V cathode drivers (BF487), states the safety issue and isolates the clock in a suitable box. Just so you know for the future, Geert is the son of the sites author (Ronald Dekker), who works for Philips as is extremely well known here. > Or else, how about this > one?http://www.geocities.ws/podernixie/nixie/index-en.html Simply a dangerous design. Should never be built. > Or, jee (although through a transformer), another > one:http://www.ledsales.com.au/kits/in14_clock_instructions.pdf ...who uses 300V cathode drivers (MPSA42). I'm not sure what your beef is here - as has been stated by others, generally nixies are driven by about 180-200VDC. All you've uncovered in your examples are two good designs which use drivers with suitable Vceo, and one dangerous design which has no isolation and overdrives the cathode switches. Look, If you want to drive your nixies from 500V, then use suitable drivers. If, like probably 95% of the population you use about 180-200V to drive them, then 100V Vceo is fine. If you use 100V Vceo drivers and 300V on the anodes, then frankly you deserve all you get - this is the danger of the Internet... -- 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.
