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Short Circuit Detection by microcontroller

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PersianMan

PersianMan

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I 'm designing a smart switch remote controllable for home automation.
I want add the capability of detecting short circuit and human body shocking protection to this single relay (of e.g. a lamp).
I mean when the circuit detect that (1) there is a short circuit in the side of lamp, or (2) live line (220v) is connected to a human body, A buzzer is alarmed and the power is break.
Hope you can understand my purpose.
Could you please suggest me a circuit or ideas to do that?

Added after 1 hours 32 minutes:

How can be protected of Electric shock (220v)?
 

Yeah it's a thing called and RCD, I don't even think this would be possible with a micro controller. If you get a short circuit on the live side then it should blow the fuse. Has all the lamps that I've seen is earthed and that is the protection. That's what ther earth is there for. If it's a plastic lamp or glasss then the live would not conduct through it
 

Hi

In order to distinguish between short and not short circuit in hi voltage circuit you need to measure the current flow though the circuit

You can use ADE7753 to measure high voltage and High current

But is is a bit of a complicated solution.

All the best

Bobi
 

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