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Topic: Can I use a PC microphone? (Read 903 times) previous topic - next topic

flameproof

I am a beginner and just playing around with parts. But I can't get that darn microphone to work! I tried a few different circuits (but have no scope here to check the output.)

Can I connect a normal PC mic directly to Uno? I guess it's an electret mic and the circuit looks like that:



Or will I need a amplifier?

DimKo

You need to 1) power the microphone and 2) amplify its signal, before using it with the Arduino.

Here's a good article on powering microphones. As for the amplification, there are various schematics based around op-amps, power amps or transistors.

I have two posts on my blog that may be of help:
Mic amp with LM358 op-amp
Mic amp with LM386 power amp
--  Dimitar Kovachev  --  http://lowvoltage.wordpress.com

flameproof


Mic amp with LM386 power amp


I used sort of this circuit with 'nearby' parts (I had a 386 in my box) and it worked!

Thank you!

Not sure why my transistor circuit didn't work, but with no oscilloscope on hand it's hard to trouble shoot.

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