dear friend,
i new to here, pls help me i doing a project in 89c51 and i would like feed the inputs, which i getting externally so for isolating i using cd4016 ic.
problem is i c'nt use it as switch by controlling external source for feeding input to mic. pls refer me any such circuits


thanks and regards.

sajeeve.p

 

problem is i c'nt use it as switch by controlling external source for feeding input to mic

If you mean as a voltage-controlled switch for connecting a mic to an amp input, why can't you?

 

Call me old fashioned but I get turned off when I see textese, no capitalization, poor grammar.

 

You're old fashioned! But so am I, so it's a compliment and high praise.

Few skills in life are more important than the ability to communicate precisely and concisely, and sometimes compellingly. This skill does not get enough priority in school. I never appreciated how important it was until I started working. In the "real world", communication skills definitely trump technical ability. It's hard for a nerd to accept.

To be fair, we've seen far worse here that what this OP has offered.

 

You can call me old-fashioned too.
From the textese I'd put money on the OP's age being <20.
We have to make allowances for the grammar of OPs whose first language isn't English.

Edit: Is 'OP' textese?

 

Nope, it's a good old fashioned abbreviation/acronym, expressing two real words by their two initial letters.