They can be a bugger to debug, though. :)
Good luck with your design, Anton. Sounds like you've got a plan of
action. Let us know if we can help.
-Adam
On 8/2/2011 12:19 PM, anton andersson wrote:
The XMEGA, and other microcontrollers, offer not just two different
modes as one usually thinks. Apart from being logical true and false a
port may also become high impedive, in practice almost disconnected.
Every cathode still needs a transistor of their own, but placing them
in a matrix and connecting their bases and emitters in a most clever
way it is possible to activate them individually using only 4 pins on
the 湣. Heck, this is even better than the K155ID1 since up to 12
cathodes can be steered this way, at any voltage the designer chooses
(as long as the BE-junction is doesn't suffer from breakdown...) IMHO
the circuit is most beautiful when Nixies with dual decimal commas are
used, since the decoder is only utilized fully then.
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