Hi Per, I found some errors myself, which I would like to correct in version 2 of the pcb. Your comments below unfortunately do not help at all. What exactly is wrong with the layout of the SMPS Thank you for your input.
Sergio On Tuesday, 14 May 2013 10:12:41 UTC+2, zapro wrote: > > Hand wired perfboard ? it's worse than that... > > Look at the board layout in the corner regarding the SMPS, it's a luck > that it actually works :-O > > > https://lh4.googleusercontent.com/-PsF8r0jvHEQ/UZDN7eiidtI/AAAAAAAABH4/x_mkJRi4IPU/s1600/nixieclock_v1.1_Leiterplatte.jpg > > That layout is _flawed_ > > // Per. > > > On 14/05/2013, at 02.38, threeneurons wrote: > > 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 neonixie-l+...@googlegroups.com <javascript:>. > To post to this group, send an email to neoni...@googlegroups.com<javascript:> > . > 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. > > > > > -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/ba7116fa-9f7e-4e24-945b-f38fa28113a5%40googlegroups.com?hl=en-GB. For more options, visit https://groups.google.com/groups/opt_out.
