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Topic: Sound with NRF24L01 (Read 156 times) previous topic - next topic

anie

Hello. I am Anie, and I am neww in Arduino....

I would like to ask for your help:

I need to connect a microphone with a NRF24L01 but the microphone needs 12v to work. How can I give that?

In the other part I need to receive the signal with other NRF24L01 and playback the sound, so I think I need to amplifier the signal, donĀ“t I?

Please help!!!

Thank you

AWOL

Does the microphone outputs digital signal?
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.
I speak for myself, not Arduino.

DVDdoug

If you are planning in using an Arduino as an ADC, I don't know if it's fast enough to digitize the audio while transmitting.  And, it doesn't have a DAC.

Quote
I need to connect a microphone with a NRF24L01 but the microphone needs 12v to work. How can I give that?
:P  With a 12V power supply, or a car battery...   I've never heard of a microphone that requires 12v, unless it's some kind of "module" with a mic & preamp.    Electret condenser computer microphones require 5V (supplied by the soundcard).   There are also electret condensers that work from one or two2 1.5V batteries...   Electret elements usually operate from a range of voltages.     Dynamic mics don't need power.   Studio condenser mics use 48V "phantom power" (supplied by the preamp, mixer, or interface).  

All microphones require a preamp to bring the millivolt signal to line level (about 1V).    And, any audio signal into the Arduino has to be biased, since the Arduino can't read the negative-half of an AC signal.

If you are going to drive a regular (passive) speaker, you'll need a power amplifier.   Powered/active speakers have an amplifier built-in, but "raw" speakers or hi-fi speakers don't (except home theater subwoofers are usually powered).

Whandall

Ah, this is obviously some strange usage of the word 'safe' that I wasn't previously aware of. (D.Adams)

Grumpy_Mike

Quote
I need to connect a microphone with a NRF24L01 but the microphone needs 12v to work. How can I give that?
By using a 12V power supply. Make sure the ground ( -ve ) of the power supply is connected to the ground of everything else.

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