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I've been thinking of my own way to do something similar, but this setup seems (after reading the first part and looking over the rest) too easy to screw up and do something dangerous with a lot of electricity for me. Proceed with caution.

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For a safer method of interfacing with AC voltage you can use something like the PowerSwitch Tail[1]. It is a little pricy (~$26 at Adafruit.com) and only works with one plug, but it means that you don't have to mess with AC voltage directly.

@cscru There is a 240V kit version of the PowerSwitch tail available.

[1] http://www.powerswitchtail.com

good point. but i do think that my setup works stable and safe for me.

however, i had added the disclaimer because others might be facing a different situation and therefore they are warned.

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