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TRIACS-need basic working explanation


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Can someone please explain to me how to hook up a triac?  I have a circuit in mind that uses an electronic doorbell running on 3 volts (2 D-cells) to pass a one-shot signal through the triac to turn it on and leave it on, allowing the secondary circuit of 12-volts to run until an inline switch resets it (turns it off).

I need to know what triac to use, pinout designation, etc.  With this info, I'll be able to plan my own circuit.

An help would be appreciated.  Send me drect e-mail at [email protected]

Thanks @;>)

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