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
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/BH4/x_mkJRi4IPU/s1600/nixieclock_v1.1_Leiterplatte.jpg
That layout is _flawed_
//
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/
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
Hi Sergio.
The SMPS-part of your Circuit should not be in close contact with the rest of
the Circuit. The parts are all over the place on your board. They should be
together in an area of less than 1in. square. Remember to keep the gate lead
short and fat, and supply tracks short and fat too.
Sergio, I am not sure if you think that Per is having a go at you. He won't be.
If you look back at the topics in this group at both Google Groups and at Yahoo
Groups you will find a lot of discussion of power supply merits and pitfalls.
Maybe you have not been in the group for very long; those
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 :
Has anyone tried their PCB service? Prices seem cheap enough.
On May 13, 7:53 pm, threeneurons threeneur...@yahoo.com wrote:
I just got a package, that I ordered from Futurlec. It took almost a month
to get here. As not to alarm anyone, I can explain why. One of those weeks
could be attributed
On Tuesday, May 14, 2013 10:15:53 PM UTC+9:30, Terry S wrote:
Has anyone tried their PCB service? Prices seem cheap enough.
I actually found them slow and relatively expensive.
Now I wouldn't consider using anyone but Laen's service at www.oshpark.com
unless I need a BIG board - in which
On Tuesday, May 14, 2013 10:23:07 AM UTC+9:30, threeneurons wrote:
I just got a package, that I ordered from Futurlec. It took almost a month
to get here. As not to alarm anyone, I can explain why. One of those weeks
could be attributed to my local post office, or specifically, my mail
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
Even those prices seem expensive to me.
Take a board 5cmx5cm, roughly 4 sq in. At oshpark that's $20
for 3 boards.
At http://www.seeedstudio.com http://www.seeedstudio.com/, a 5cmx5cm
board will run $9.90
and you get 10 boards. That's considerably cheaper, but you may have to
wait a bit to
I use http://www.hackvana.com for my boards, even cheaper than seeedstudio!
Sent from my iPhone
On May 14, 2013, at 9:05 PM, Scott Burris electrosc...@yahoo.com wrote:
Even those prices seem expensive to me.
Take a board 5cmx5cm, roughly 4 sq in. At oshpark that's $20
for 3 boards.
At
Smiffy wrote:
... I settled on Element14, with whom I managed to wangle a good discount.
Element14, is part of Newark/Farnell. That's the big leagues, up there with
Mouser Digikey. Much more professional outfits. These are also the tree
killers. Both Mouser and Digi-key have catalogs as
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