Could you use a shift register to expand the available pins?

On Fri, Jul 13, 2012 at 8:49 AM, dr pepper <seaking.helicopt...@gmail.com>wrote:

> I have a nixie clock prototype that uses 4 in1 nixies, a in9 bargraph and
> a og3 dekatron.
> The clock works well however the dekatron takes up 4 pins of the pic micro
> (3 for guides and 1 for zero detect), and I need these for further
> expansion.
> Is there an adaptation of the single pulse circuit that can be driven from
> 5v logic from the micro so that I can step the dekatron from just one pulse
> output from the micro.
> I'm thinking a few resistors and high volatge caps for the required guide
> time delay.
>
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