Arduino NANO 328p compatible board with built-in digital microphone

Hardware Nano Family Classic Nano
1

Is there an Arduino NANO 328p compatible board with built-in digital microphone? I know there is Arduino Nano RP2040 Connect board, but its different thing.

2

No, there is no such board.

There is no point having "a built-in microphone" on classic Nano, because Atmega328 haven't enough hardware and resources to process audio signal

3

Will the code written for Arduino Nano 328p work with Arduino Nano ESP32?

4

It depends on the code.

1 Like
5

The Nano 33 BLE Sense Rev2 has an on-board microphone.

6

yes, but it 3.3V, I'm looking for 5V.

7

Moreover, the Nano 33 is not a Atmega328 compatible

8

A Nano ESP32, a 3V board without a built-in mic, was 'wondered about' in Post No.3

9

Will this code work on Nano ESP32?

10

The code use a direct access of the Atmega mcu registers:

  sbi(ADCSRA, ADPS2);
  cbi(ADCSRA, ADPS1);
  sbi(ADCSRA, ADPS0);

so it can't be run on the different mcu architecture such as ESP32

1 Like
11

@kvantum
Why the "built-in" microphone is mandatory for you?
The project that you link in #9 contains a schematic using an external audio source

12

@b707
Yes, that's correct. I just believe that using an on-board microphone will minimize possible interference. Or this isn't so important in this case?

13

sorry, I don't know.
But it doesn't matter because the code require an AVR mcu

14

There is no also Nano Atmega328 version with audio-in 3,5mm socket?

15

The ATmega328 is not useful for audio, so you are very unlikely to find one with a microphone, audio jack, etc.

16

Nevertheless, it works, and looks prettily.