Montaigne, Mike wrote:
>
>         I wanted to build a PIC controlled zero crossover lighting
> dimmer, for our church and briefly discussed this a few months ago.  I
> was using a 555 timer triggered on the zero crossover to get my delay.
> The problem was I wanted 0-10 volt remote control so I could locate my
> controls in the balcony and the power unit under the stage.  (The other
> problem is, we have no money).

Here is an alternative way of doing this, its also opto isolated.
You drive the led in the opto with a pmw signal ( of around 1kHz
should do ) you need no zero crossing with this system

Depending on your load you may need to use different transistors
ie: a TIPL 763 should be good for 1kw


Peter Cousens
email: peter@cousens.her.forthnet.gr  phone: + 3081 324450, 380534
snailmail:  Folia, Agia Fotini, Karteros, Heraklion  Crete, Greece.

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