Pi-Fest - Making Some Noise with Raspberry Pi Pico (Blog1)

23 Jun 2022

Hi All,

In this blog i write about my project concept and components required to make some noise with Raspberry Pi Pico.

My Project title name would be "Entry Theme Player" , The idea is to play theme track/music when people enters. This can be used in any party, events and sports for welcoming people etc.

In this design challenge i did not want to complicate with more stuffs like coding or using advanced technology since its going to be fun project. This project can be recreated by anyone like students or beginners.

In this design Raspberry Pi Pico is interfaced with sensor and amplifier. It detects the person entry and play a music for a few seconds.

Block Design

Components Required

Raspberry Pi Pico
MAX98357A I2S Amplifier
Speaker
Sensors (Radar/PIR Motion Sensor)
Battery or Solar Cells

Block Design

Making of Noise

Board Setup:

To make some noise , I started with breadboard hookup. Took an Pico board and interfaced to the MAX98357A board from Ada-fruit.

It uses I2S communication to stream audio data from Pico.

The Amplifier board is capable of driving 3W speaker. I have connected 8Ohm , 3W speaker to the Amplifier.

Code with Mu Editor:

The coding for Nano is done using MicroPython , I have used Mu Editor for coding and dumping the binary.

To start with coding, i have taken up basic code which generates the sine wave and sends the audio over I2S.

The code has been running on Pico , the LED blinks and makes noise for every seconds once. It also supports the .wav , .mp3 formats to play on speaker.