The most scematic i simulate with LTspice
http://www.linear.com/designtools/software/#LTspice. It have no cost and
is with no limits.
Good for begiining ar this documents from a german teacher.
http://www.gunthard-kraus.de/LTSwitcherCAD/SwitcherCAD-Tutorial_English/pdf-File/
http://www.gunthard-kraus.de/LTSwitcherCAD/index_LTSwitcherCAD.html
Jens
Am 14.05.2013 09:54, schrieb nix:
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
<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
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