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K Oscar 30th July 2008 10:59 PM

DIY mic mixer question

I'm new to this and I don't think this is a hard thing to figure out, but I can't figure it out.

I wanted to build a 4 channel microphone mixer for use with electret microphones.
I wanted to use this circuit diagram:

My questions:

If I need a fourth channel can I just add an extra input (input, Resistor and Pot)?

If I use this mixer do I still have to battery power the electrets like this:

wakibaki 30th July 2008 11:05 PM

1. Yes

2. Yes


Don't expect fantastic performance, the 741 isn't very good and the circuits aren't very sophisticated.

K Oscar 31st July 2008 11:27 AM

I figured that the sound wouldn't be that great.

But thanks a lot!


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