Hi everyone, I'd like to use the SN75468 as a nixie driver in my next clock.
According to earlier posts, the key thing to ensure is that the common pin (pin 9) is clamped to a voltage below the ic's darlington transistor rating of 100V. Looking at some earlier designs (some of which are based on the similar but lower voltage rated part, the ULN2003), this clamping has been achieved with a zener in one of two ways. I've illustrated these, which I call options A and B, pictorially here: http://lucsmall.com/2011/07/19/using-the-sn75468-as-a-nixie-tube-driver/ Can you tell me what the right approach to take is or, if things aren't so cut-and-dry, the relative merits of each approach? Here are the earlier designs to which I refer: http://www.cathodecorner.com/nixiewatch/theory/nwrf-schem.pdf http://web.jfet.org/nixie-1/ http://joule.bu.edu/~hazen/Nixie/ Many thanks, Luc -- 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.
