As shown in the above musical fountain circuit diagram, the sound sensor is powered with 3.3V supply of Arduino Nano and the output pin of the sound sensor module is connected to the analog input pin ...

The block diagram of the Digital Firecracker is shown above. The brain of this project is an Arduino Nano ... the pins as input and output. Next, we initialize the Serial and the neopixel instance.

I power the iA6B using a 2-wire cable from the input rails ... The Arduino Nano makes things more difficult, as you have Vin/5V on one side, and RxD on the other side. So you need to use multiple ...

On the Uno, Nano ... the board's Arduino Store page). PWM pins in the diagram have the same tilde sign in front of the pin numbers. PWM pins are generally used in controlling output devices ...

Here's an outline of the code: Capture audio samples Perform the FFT library function on the samples Map the FFT output to the display ... which are read by the Arduino Nano through its analog input ...