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Electret Condenser Microphone preamp analysis
Electret Condenser Microphone preamp analysis
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Old 16th September 2014, 01:07 PM   #21
Mooly is offline Mooly  United Kingdom
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Electret Condenser Microphone preamp analysis
So it seems the added noise is coming from the microcontroller.

This is something you will have to play around with and see what gives the best results. And its definitely something you need to be sat in front of to work on and see what is actually happening.
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Old 16th September 2014, 10:22 PM   #22
Chris Daly is offline Chris Daly  Australia
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Quote:
Originally Posted by hozone View Post
On some microcontrollers, i can not use 5V, they works at 3.3v.
You could drop 1.7v off the 5v, for the 3.3v supply, with a series connected (anode to 5v cathode to the microcontroller ) Red LED, pretty easy. Budget wise its a winner, but there are of course lower noise devices such as the LT1963 regulator.
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Old 24th September 2014, 05:35 PM   #23
hozone is offline hozone  Italy
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I've made further investigation, is the power line
As simple 7805 solved all.
Thank you for support.
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Old 24th September 2014, 05:37 PM   #24
Mooly is offline Mooly  United Kingdom
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Electret Condenser Microphone preamp analysis
Well done.
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