connecting a mic to ADC

[vesker]

I don't know if what I am trying to do is even possible (with my device).
I want to connect a microphone to one of the input ports and then sample it using the ADC
just to see if i get a voltage change, but I don't really understand how to wire the microphone (GND & POS).
I am using the MSP430.
I am new in embedded systems, and I will be more then happy to know if it is possible and if not why!

Thank you for answering!!!

 

[papunblg]

I don't know if what I am trying to do is even possible (with my device).
I want to connect a microphone to one of the input ports and then sample it using the ADC
just to see if i get a voltage change, but I don't really understand how to wire the microphone (GND & POS).
I am using the MSP430.
I am new in embedded systems, and I will be more then happy to know if it is possible and if not why!

Thank you for answering!!!

https://www.edaboard.com/threads/51865/

 

[vesker]

so from what I understand I need to connect the mic to some sort of amplifying circuit in order to receive a signal.
My application is not to record voice it's only to sense some noise change, is there an easier way? most of the circuits
look pretty complex.

 

[doraemon]

Hello!

I think there is no easier way, you have to use an amplifier. By the way, don't build
your amp with transistors. We are in 2012, you should use an op-amp. That's the best
solution in terms of surface and simplicity.
There is a good amplifier schematic to be used with MSP430. It's used on one board,
I don't remember the name of the board, but it was with a 4618 if I remember correctly.
Use that circuit (or buy the board if it's just for experimentation).

Dora.