Hi -

Sorry but the MOC3023 and the rest of its family don't syncronise with the
mains. They are "just"
opto-triacs. (are ther others that do?)

But you can proberly use them anyway: 

a. Ignore the syncronisation (you won't "start/stop" that often)
b. use an input on the pic conntet to the mains (thru another opto?)
c. use a daming coil. (if space is no problem).

I have not tryed any myself...

/holger

> ----------
> From:         Seyler Jean-Yves[SMTP:Jean-Yves.Seyler@CNES.FR]
> Sent:         Tuesday, May 04, 1999 9:57 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: TRIACS FIRING
> 
> Use a MOC xxx device.
> I can't remember the exact reference : it is a opto-triac (DIL 6 pins)
> synchronized with the main:
> -> That makes a perfect isolation from the main and not much EMC since
> it opens and close when the main go to 0 volt.
> 
> Hope this helps
> 
> Jean-Yves
> 
> >----------
> >De :   WILLIE W. HO[SMTP:mtl@pub.zhongshan.gd.cn]
> >RŽpondre ˆ :       WILLIE W. HO
> >Date : mardi 4 mai 1999 06:13
> >A :    PICLIST@mitvma.mit.edu
> >Objet :        TRIACS FIRING
> >
> >Hello,
> >
> >I'm using 12C508 to control a heating device, anyone can tell me how to
> >firing a triacs to control the heating device on/off.
> >
> >Best Rgds,
> >
> >Willie W. HO
> >
>