I found out why the 10k didn't work. This is being driven by pin 3 on the PIC (RA4) which is an open-drain output. I have a 10k pull-up on it. Reducing the base resistor to 10k loaded this down too much. When I reduce the pull-up to 2k, the 10k base resistor works.
On Tuesday, September 11, 2012 3:30:24 PM UTC-4, dr pepper wrote: > > Hi again, > > Good to see the 100k improves things, leakage either is or contributing to > the isse then, maybe the base of Q9 is capacitvely coupled to something, I > dont know why the 10k messed things up, 10k isnt a low enough resistance to > upset the pic, if you pull too much current from the pic and force its > current limit into operation then you can have all kinds of issues with the > good old read modify write problem. Maybe something else odd is going on > there. > > > -- 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]. To view this discussion on the web, visit https://groups.google.com/d/msg/neonixie-l/-/bBjYeDbeuIAJ. For more options, visit https://groups.google.com/groups/opt_out.
