Is there some hand wired perfboard circuitry involved ? If so, can you provide a photo of both sides. Back in school (when dinosaurs roamed the Earth), I noticed a lot of my fellow students, used thin wire for everything. Power and ground should be heavier. Those switching supplies generate a bunch of interference. This makes "physically" routing signals, especially power and ground, even more important. Everybody should get a copy of Don Lancaster's TTL Cookbook, if just for the construction guide lines. For actual circuit ideas, you can get his CMOS Cookbook, too. Both are old books, form the 70's, but many of the guidelines still apply.
On Monday, May 13, 2013 4:19:05 AM UTC-7, nix wrote: > > Hello I just build my own Nixie clock with input from Arduinix.com and a > power supply from ledsale (Build a nixie power supply - > LEDsales<http://www.google.ch/url?sa=t&rct=j&q=nixie%20power%20supply&source=web&cd=5&cad=rja&ved=0CEEQFjAE&url=http%3A%2F%2Fwww.ledsales.com.au%2Fkits%2Fnixie_supply.pdf&ei=-smQUbLsKvD24QSX9IDgDA&usg=AFQjCNEiqKM6Acf_mlaSDuBrhUqL2A5Uvw&sig2=Bi2PdGfH0ERKhqQkk5wFQA&bvm=bv.46340616,d.bGE> > ) > > Attached find the circuit and the pcb from fritzing. The clock works fine > but when I adjust the high voltage with R36 the ds1307 module from Twig > http://shop.boxtec.ch/twig-ds1307-p-40355.html starts to flicker because > on the serial interface it shows strange numbers like *165*:*165*:85. > After a while it does not return the time over the i2c interface at all. A > restart of the nixie clock starts showing the time again. With an > oscilloscope I can see that after a certain position on R36 the SDA puls > disapear and it shows a flat line. I think it is at high level. Not so > shure how to read the oscilloscope. > > Any Idea why? I don't see a direct link from the high voltage power supply > to the 2 wire interface. (see attached circuit) > > Kind regards > > Sergio > > -- 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/8f9bd2a6-1578-4dfe-b029-bc81159848d4%40googlegroups.com?hl=en-GB. For more options, visit https://groups.google.com/groups/opt_out.
