I plan on using 12V 500 ma bulbs and staying away from triacs.



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John Mullan wrote:
>
> I have used the 5832 (high current 32 bit shift register).  You could
shift in data for each bulb.  I'm imagining that you will use low voltage
incandescents.  This driver chip can handle up to 24v (or there abouts).
>
> Depending on number of lamps driven at any given time, you may need to
drive the lamps using TIP30/31 or triacs if using AC.
>
> John Mullan

... for a long and steady power switch to the lamps, a triac in AC is
ok, but not for multiplexing, since you can not turn it off faster than
16.6ms... remember, once it turns on, it will still on until the senoid
crosses zero.

It means, that if high speed shifting the 5832 with triacs at its
outputs, all triacs that receive a fast "1" bit when shifting will turn
its lamp on...and stay on for a minimum of 16.6ms... will be funny... :)