anbu123:
i want to read the electrical appliances state.so i need to convert 230v to 5V dc.Is there any easiest way to convert voltage from 230 to 5V.
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is there any other alternate optocoupler available??
Also, I had nothing better to do, so I went with an interpretation of what you are looking for, but you still haven't elaborated in a way that any of us can be sure of what it is you really want. Grumpy_Mike is correct that your "state" statement is rather vague and meaningless.
I refer you to the "Rules" of this forum: How to use this forum - please read - Website and Forum - Arduino Forum