Visual Sound Alert Detector / Sound Analyzer : Wifi Kit 32 V3 (ESP32) + Max9814 + (3xAA or 18650 holder)

Gadget: Sound Alert System

Description: This gadget utilizes Arduino and various libraries to create a sound alert system. The main functionality of the code is to detect specific frequencies with certain intensities and display corresponding alerts on an OLED display.

The system continuously captures sound through the Max9814 microphone, performs fast Fourier transform (FFT) analysis on the sound data, and checks for specific frequencies and intensity thresholds. When a detection occurs, an alert is triggered, and the corresponding message is displayed on the OLED screen.

Github project: https://github.com/nadamas2000/soundAlert-soundAnalyzer-ESP32

Hardware:

• Microcontroller Board: Heltec Wifi Kit 32 V3 (ESP32)
• Microphone: Max9814
• Battery Holder: 3xAA Battery Holder / 1x18650 Battery Holder

References:

• Heltec Wifi Kit 32 V3 board: https://heltec.org/project/wifi-kit-32-v3/
• Microphone Max9814: https://www.analog.com/media/en/technical-documentation/data-sheets/max9814.pdf

Working wake up and frequency detection: https://www.youtube.com/watch?v=QawYXSqPsZ8
Working in case: https://www.youtube.com/watch?v=QHgimJAhCMs
Different sound analyzing modes (old release): https://www.youtube.com/watch?v=icu3Co2jCHw

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