The Motorola Optoelectronics Device Data book has a very good section on
triac interfacing.  Page 8-24 - Applications of Zero Voltage Crossing
Optically Isolated Triac Drivers.  It has all of your basic logic to
triac opto to power triac circuits.  In some "circuit cookbooks" there
are circuits for direct logic drive of power triacs.  Unless the triac
is designed to be logic controlled do NOT direct drive.

Rob Tracy
FotoShield Controls
RnD

David Dobbs wrote:
>
> Hi,
>         We are working on a lighting controller but we need some info and /
> or code on Zero Crossing, Phase Control and Interfacing Triacs. We would
> prefer code for the 16C84 but that doesnt really matter as we can convert it.
>
>                                 Thanks from
>                                         David Dobbs
>
>
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>                 Just to let you know we have a web page at
>                       ' http://www.innotts.co.uk/~dobbs/ '
>
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