Raspberry Pi Pico Decibel Meter Using INMP441 (I2S Mic)

📌 Project Overview

Noise is everywhere — but how loud is too loud?

In this video, I build a portable Decibel Meter using Raspberry Pi Pico and a high-precision INMP441 I2S MEMS microphone. The device measures real-time sound levels, displays them on an OLED screen, and runs completely standalone with a battery-powered design.

This project covers:
• Real-time sound level measurement (dB)
• I2S microphone interfacing with Raspberry Pi Pico
• OLED visualization
• Custom 3D-printed enclosure
• PCB-based final assembly for a professional finish

This is a practical electronics + embedded systems project, perfect for IoT, environmental monitoring, noise analysis, and learning MicroPython with Raspberry Pi Pico.

🔧 Components Used
• Raspberry Pi Pico
• INMP441 MEMS I2S Microphone
• 0.98" OLED Display
• 3.7V Li-Po Battery
• TP4056 Battery Charging Module
• Custom PCB
• 3D-Printed Enclosure

🧠 What You’ll Learn
• How I2S microphones work with Raspberry Pi Pico
• Measuring sound intensity in decibels (dB)
• Displaying live sensor data on OLED
• Designing and printing an enclosure in Fusion 360
• Turning a prototype into a polished, portable device

Special thanks to JLCMC for sponsoring!
JLCMC offers nearly 600,000 mechanical component products for makers, engineers, and DIY enthusiasts.

🎁 Get $123 Discount Coupons (New User Offer):
👉 https://jlcmc.com/?from=RL2

JLCMC have recently upgraded their new-user registration benefits, increasing the value of the welcome coupon package to $123 in discount coupons. Whether you’re building DIY electronics, robotics, or mechanical projects, JLCMC has you covered with quality parts and fast delivery.

⏱️ Chapters
0:00 ➜ Final Device Preview
0:03 ➜ Introduction
0:12 ➜ Components Overview
0:52 ➜ Sponsor Message (JLCMC)
1:40 ➜ Breadboard Testing (Microphone + Pico)
1:57 ➜ Code Explanation & Testing
2:14 ➜ Adding OLED Display
2:26 ➜ Code Explanation & Testing
2:48 ➜ 3D Printed Enclosure
3:01 ➜ PCB & Power Circuit
3:23 ➜ Final Assembly
4:46 ➜ Sound Level Testing
5:25 ➜ Outro

💻 Source Code & Files
🔗 Source Code, Circuit Diagram & Design Files:
👉 https://github.com/ShahbazCoder1/Port...

🔔 Stay Connected
📺 Subscribe:    / @roboatticlab  
📷 Instagram:   / roboattic_lab  
🐦 Twitter (X): https://x.com/DiyBurner
📘 Facebook:   / diyburner  
🛠️ Instructables: https://bit.ly/2WtCcIt

🎵 Music Credit
1. Music: Bensound
License code: 5FQI2DRSPBCSUAJI
Artist: Marcus P.

2. Music I use: Bensound
License code: KLOXICDAZTMURVZL
Artist: : Aventure

Thank you for watching!
If you found this project useful, don’t forget to like 👍, share 🔁, and subscribe 🔔 for more Raspberry Pi Pico, electronics, and DIY tech projects.

#raspberrypipico #decibelmeter #sound #fusion360 #soundlevelmeter #inmp441 #i2smicrophone #raspberrypiprojects #picomicropython #electronics #electronicsdiy #iotprojects #noisepollution #anycubic #embeddedsystems #3dprintedenclosure #3dprinted #pcbdesigner