On Jan 9, 6:03 am, Imbanon <[email protected]> wrote: > Hi everyone. > First of all, I wish you a happy New Year and all the best! > > Even after searching the whole group, I have some questions about > multiplexing, now that I've finally received my spare uC. > > I am using this schematic:
http:// www. imageshack. us/photo/my-images/209/ anodecontrol.png I think you're trying to make the circuit in figure (a), below: http://threeneurons.files.wordpress.com/2011/08/anode_nixie01.gif That one uses a NPN (MPSA42) and a PNP (MPSA92). Note: R3 is required, due to the non-linear nature of a BE junction. Both transistors work in the "common emitter" mode. The circuit in Figure (b) uses two NPNs. The 1st is configured as a common emitter stage, and the 2nd as an "emitter follower" (common collector). The output (emitter) will follow the input (base), so it needs to swing the entire voltage range. "Follower" stages have a voltage gain of one (rounded off, but really just under). They are used for current gain. Like in all things, don't believe me. Hook it up and see for yourself. -- 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.
