Re: gEDA-user: basic anti-EMI design q

["John Luciani" <jluciani@xxxxxxxxx>]

On 3/25/06, DJ Delorie <dj@xxxxxxxxxxx> wrote:

> Hmmm... would it help if I timed the opto transitions to occur at a
> zero crossing?  I was planning on putting a sensor on the AC anyway,
> as an additional clock and power detect, but I could use it to
> syncronize the optos.  Remember, no dimming - stricly on or off, for
> minutes on end.

Switching at a zero crossing is a good idea in general. You will dissipate less
power in your switch and generate less EMI since the di/dt should be much lower.

(* jcl *)


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