Thanks Gregebert, and thanks David. I removed the pin from the PLCC socket and soldered a thin wire directly to Vdd and to the POL pin on the HV5530. I hated to do that!
Dimming now works perfectly. David, I will do a revision 2 of the board, and I'll try to arrange GND and Vcc on the bottom. Thanks for the suggestion. Now to bring up more of the hardware. I'll be back. On Thursday, June 11, 2015 at 1:12:34 PM UTC-4, nixiebunny wrote: > > Mitch, > > Those of us who have been laying out PC boards for many years have > learned (the hard way) that it's a good idea to route all inputs that > are tied to Gnd or Vcc on the bottom layer with a narrow trace, so that > it may be easily cut later when we discover that the board design had an > error. > > Not that circuit designers ever make mistakes. > > I can tell you how to cut a trace that's buried in layer 4 of a 12 layer > board, using a drill bit and a microscope and an ohmmeter. Because I've > had to do it. > > On 6/10/15 5:21 PM, Mitch wrote: > > > > I grounded POL following the Nixiechron schematic. Somehow dimming works > > well with that clock. Hopefully the answer is not to connect POL to VCC. > > Traces are under the PLCC socket. > > > > > -- > David Forbes, Tucson AZ > > -- 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 [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/907fcae6-1ec2-4e4f-a757-eda9c662ddf7%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
