Unbelievable. I yanked out the four data wires, (picaxe to
74141), double checked them, and NOW, I get 4,5,6,7!!!! What is
going on!?
Shane
On Wed, Jul 20, 2011 at 4:48 AM, jb-electronics
<[email protected]
<mailto:[email protected]>> wrote:
Hi,
I think the problem can be circled fairly easy:
Create some sample code that is supposed to have the Nixie
tubes read out a static "12:48" for example. Then check the
corresponding BCD inputs on each chip. If the right number
appears there (in BCD format, that is) and the chip displays
a wrong number, then most likely the chip is defective.
If you realise there are already the wrong numbers on the BCD
inputs then you might want to recheck your wiring and coding.
It sounds really obvious, sorry for that, but this is the
first thing I do when this happens, and it happens more often
than one would actually presume. One of my favourites was
when I had a software-internal bit shift that made all my
numbers about twice as low as intended ;-) I thought it was a
circuit issue. So you might want to check out your software
as well.
Jens
Am 20.07.2011 11:05, schrieb Terry Kennedy:
On Jul 20, 1:20 am, Shane Ellis<[email protected]
<mailto:[email protected]>> wrote:
It's an IN-14.
I have a running version of this exact same circuit,
I built into a
Christmas ornament, been running perfectly since I
powered it on, on
December 23rd. I looked at my old files, and this is
identical, and still
this one is acting buggy. I'll mess with it again
tomorrow, and let
everyone know what, if anything, I figured out.
Are using the Soviet K155ID1 decoder / driver? There was
a bad batch
of those which caused all sorts of havoc. It could
probably happen in
the non-Soviet parts, too.
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