There is a chance that you have a bad 74141. I would try disconnecting
the 74141 inputs from your uC and try grounding them all. Does
everything turn off? try pull one of the inputs high and verify that the
correct number is lit. I'd do this before proceeding.
If the 74141/Nixie circuit works fine disconnected from the uC, then
you've got a uC problem. Figure out where your problem is before you
proceed any further.
-Adam
On 10/15/2012 9:57 AM, mpestkow wrote:
Hi all,
That's my first post, but I hope I get an answer to my huge beginner
problem. So, I've recently started to build my own Nixie clock. I have
four LC-531
<http://www.tube-tester.com/sites/nixie/data/lc-531.htm> nixie (Polish
production) gathered from old Unitra Multimeter. All of them works
fine when I'm trying to connetct it to HV source (Voltage converter
9V->150-220V - schematic
<http://mirley.firlej.org/files/P9150_Schemat.gif>) I'm using
~*180-190V *and *10k* resistor (*is it good?*).
Few days ago I finally get some 74141 and I was trying to test it, so
I connected it to ATtiny2313 like this:
<http://i.imgur.com/1a6Lw.png>
and program MCU with that code <http://pastebin.com/j62JTyVv>. It
should count on Nixie lamp from 0 to 9 (2 sec per digit).
Double checked all my connections and*as the result I've got Nixie
lamp with all digits glowing in the same time. *
I also checked 74141 using LED diods (+ to 5V and - to 74141 outputs)
and it works fine (diodes light one after another)
*Any suggestions what I'm doing wrong? It seems to in some way all
outputs are connected to GND when using HV to my nixie (works fine
with LED).*
EDIT If I'm missing any electronic part here, please provide me info
how to connect it and how it will help, I 'm Software Engineer and
unfortunately, I'm not good in whole electronic stuff (yet :) )
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