Circuit Documentation

Summary

This circuit integrates an ESP32 microcontroller with an Adafruit MAX9814 Electret Microphone Amplifier. The ESP32 is a versatile microcontroller with a wide range of GPIO pins suitable for various applications, including IoT devices, automation, and signal processing. The Adafruit MAX9814 is a high-quality microphone amplifier with automatic gain control, designed for easy interfacing with microcontrollers like the ESP32.

The purpose of this circuit is to capture audio signals through the microphone amplifier and process them with the ESP32. This could be used for applications such as voice recognition, audio recording, or sound level monitoring.

Component List

ESP32 (30 pin)

• Description: A 30-pin microcontroller with Wi-Fi and Bluetooth capabilities, suitable for a wide range of applications.
• Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, Vin, D23, D22, TX0, RX0, D21, D19, D18, D5, TX2, RX2, D4, D2, D15, 3V3

Adafruit MAX9814 Electret Microphone Amplifier

• Description: A microphone amplifier module with automatic gain control.
• Pins: GND, VDD, GAIN, OUTPUT, A/R

Wiring Details

ESP32 (30 pin)

• D34: Connected to the OUTPUT pin of the Adafruit MAX9814 Electret Microphone Amplifier.
• GND: Common ground with the Adafruit MAX9814 Electret Microphone Amplifier.
• 3V3: Powers the Adafruit MAX9814 Electret Microphone Amplifier by connecting to its VDD pin.

Adafruit MAX9814 Electret Microphone Amplifier

• OUTPUT: Sends the amplified microphone signal to the ESP32's D34 pin.
• GND: Common ground with the ESP32.
• VDD: Powered by the 3V3 pin from the ESP32.

Documented Code

No code has been provided for the microcontrollers in the circuit. To fully utilize the circuit's capabilities, embedded code for the ESP32 should be developed to handle the input from the microphone amplifier, process the signal, and perform the desired actions based on the application's requirements.