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<p>Robyn</p>
<p>Jasper has already suggested the MOC3014.</p>
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<p>When switching inductive loads, we used this method we copied from a commercial device, and it stopped us blowing up transformers.</p>
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<p>We used MOC3010 since we already detected the zero and switched then, and I was asked why the diodes ...</p>
<p>Because they were there .... but I presume they introduce 0.6v drop ...</p>
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<p>I used this ever since with no issues</p>
<p>Mark</p>
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<p>On Sun, 28 Dec 2014 11:22:26 +1300, Robin Gilks wrote:</p>
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<pre>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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