Hello Jens, thank you for your help. How did you simulate it? Kind regards Sergio
On Tuesday, 14 May 2013 08:46:54 UTC+2, JensG wrote: > > I have simulate the scematic. > > You need a resistor between NE555 out and Gate Q1. I think 150 Ohm is > good. The peek current is verry high, about the input capacity of the gate > from the mosfet. > > Jens > > Am 14.05.2013 02:38, schrieb threeneurons: > > 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 interferene. 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/f3ed76b0-e2c2-4276-a9b7-7cf1aaa5fd86%40googlegroups.com?hl=en-GB. For more options, visit https://groups.google.com/groups/opt_out.
