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interface between 240Vac and 5Vdc of a PIC

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brunofunchas

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Hi!

I have a simple Project where I just want to know when a circuit breaker trips.

This CB does not have auxiliary contacts. So I thought that I can you use an interface and measure the voltage at the input of a PIC.

To isolate the high side(240Vac) from the 5Vdc from the PIC I should use a relay to signal at the port of the PIC the presences or not of tension.

Is it possible to do it with opto-couplers? Or another type of IC?

Thanks,
Bruno
 

hi


yes u can use ac solid state input moudel to interface high side 240v ac to ur pic

**broken link removed**
 
you can use a current transformer.
 
There are isolated ADC's available in the market

Google for it you will find a lot

Nandhu

Added : i found this one
 
hi
u can use this circuit to do interface between 240vac and 5vdc of a pic
 
Hello!

Thanks for all of the replies. It solved my problem.

Best regards,
Bruno
 

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