Hi All,
thanks all for this valuable comments. I see now that I should have
studiedt more before creating the PCB. I really thought its just wiring the
things together!
I see that the arduinix layout is much cleaner, but does it fullfill all
the arguments from Alex?
I will take all this input
I have an other scematic,
simulatet and it works in hardware.
http://threeneurons.wordpress.com/nixie-power-supply/
Jens
Am 15.05.2013 08:47, schrieb nix:
Hi All,
thanks all for this valuable comments. I see now that I should have
studiedt more before creating the PCB. I really thought its
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
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
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/
Here's an example of a NE555 Nixie PSU with layout that shows the fat
tracks on the PCB:
http://bleuchez.wordpress.com/2011/09/05/a-low-cost-nixie-tube-power-supply/
(it
could be made even tighter but it works). At the end of the text there are
also references to a design by Nick De Smith :
Sergio,
I see the problem.
As others have said, your PC board layout may be correct for your net
list, but it is completely wrong for a switching power supply.
The Nixie power supply design by Nick DeSmith is a good one. Copy it
exactly.
When doing a PC board layout, the first thing to do
Am Montag, 13. Mai 2013 13:19:05 UTC+2 schrieb nix:
Hello I just build my own Nixie clock with input from Arduinix.com and a
power supply from ledsale (Build a nixie power supply -
What spence says, and keep your wiring short esp to the nixies.
A 1000u cap right at the power input wouldnt be bad either.
If the issue occurs at a certain ht voltage then maybe your reaching
the breakdown voltage of the switching fet/transistor, I've had this
before.
Another thing is the
The wires to the nixies are 10 to 20 cm long. The output of pin 3 on the
555 looks like this in the highest voltage where the problem exists.
https://lh5.googleusercontent.com/-U2MTDu_zPGE/UZFc8Iif_1I/BI4/4hwtpldobew/s1600/2.jpg
With the decoupling capacitor on the ds1307, it is possible to go a little
bit higher then the 170 Volts which is enough to illuminate all the digits.
The error still occurs when going over the 180 Volts, but the clock seems
to work :-)
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
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