You can protect against crashed programs from toasting tubes, at least with the pic micro by using the watchdog timer, carashes can be detected and dealt with. For real expensive tubes you could add a capacitor resistor missing pulse detector to power down the ht if the multiplex anode switches die/
On 27 Feb, 12:06, Cobra007 <mic...@xiac.com> wrote: > No no, the issue was that it was stated that 7 transistors MPSA42 with > a 300 Vceo could be replaced by 1 IC SN75468 with a 100 Vceo. > > The only thing I remarked was that this is only possible if the used > voltage is not too high (not over 250V) because otherwise you couldn't > blink the nixies to set the time for example (they won't turn > completely off). > > If blinking is required in any of the 3 designs that I just showed, > the transistors cannot be replaced with the SN75468. I didn't mean to > say all of them are dangerous designs, I only say they all use a DC > voltage above 300V. > > > 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. > > Thanks for letting me know, I am sure he will understand what my > remark was about. > > Michel -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
