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Help! Circuit on ac/dc switching

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ym2k said:
Thanks for your help dude, but they won't be a person doing a manual switching when the power is cutoff.
Click to expand...

Sorry mate. No person required on your side. Operation is automatic.

Forgot to mention that "whoever" in the previous post can be he/she/it. So it can also be a relay, or some mechanism which actually changeover 12V back to AC230V and is outside your control.

I have no comment on the use of an inductor to protect 12V application from AC230V.
 
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