[chbot] Opto isolated triacs - Digikey account anyone?

[m.beckett at amuri.net]

Robyn 

Jasper has already suggested the MOC3014. 

When switching
inductive loads, we used this method we copied from a commercial device,
and it stopped us blowing up transformers. 

We used MOC3010 since we
already detected the zero and switched then, and I was asked why the
diodes ... 

Because they were there .... but I presume they introduce
0.6v drop ... 

I used this ever since with no issues 

Mark 

On Sun,
28 Dec 2014 11:22:26 +1300, Robin Gilks wrote: 

> Greetings all
> 
>
I'm going to have to change the way I drive the triacs on my
irrigation
> controller as I think the asymmetric switching I'm
currently using is
> causing a DC component to get to the solenoids and
blowing them up (8-9 of
> them so far this year at over $40 a pop!)
> 
>
The simplest mod I can come up with is to put zero switching opto
triacs
> between the existing drivers and triacs - that only requires a
4 pin DIL
> and 1 or 2 resistors (times 32 for the number of channels on
the
> controller)
> 
> The Toshiba part TLP361J(F) available from
Digikey looks like it will do
> the job but I'm pretty sure you need an
account to get stuff from them.
> Can anyone assist in this area?
> 
>
Cheers

  
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