On 12 Apr 2014, at 23:03, Michel van der Meij wrote: > Hi John, > > I use the attached circuit in my ZX81 nixie clock and works great. On J7 pin > 1 is the 12V input (mine is 9V btw). Pin 2 can be pulled down to gnd with an > open collector circuit which will then power up the 555 circuit. The gate of > Q5 is normally kept high by resistor R16 which prevents Q5 from conducting. > R16 is not critical, you can also choose a 10K resistor, doesn't matter for > as long as the gate is kept high and the open collector transistor can drive > it low. > > Best regards, > Michel
Thank you Michel, that was very helpful information. John S -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/18187749-6C56-42D4-9C2A-FA91E2B587C0%40jsdesign.co.uk. For more options, visit https://groups.google.com/d/optout.
