Design with SparkFun Electret Microphone Breakout in Cirkit DesignerThe SparkFun Electret Microphone Breakout is a compact and versatile module designed to capture audio signals through its onboard electret microphone. This breakout board amplifies the weak electrical signals from the microphone, providing a usable analog output that can be easily interfaced with a variety of microcontrollers, such as the Arduino UNO, for audio detection and recording applications. Common use cases include sound level meters, audio recording, voice recognition, and simple audio-triggered systems.
This circuit is a digital voice playback and recording system powered by a 3.7V battery. It features an ESP32 microcontroller for processing, an Adafruit MAX98357A amplifier to drive a loudspeaker for audio output, and an Adafruit MAX9814 microphone amplifier for audio input. A pushbutton provides user interaction, and a 3.3V regulator ensures stable power supply to the components.
Open Project in Cirkit Designer
This circuit features multiple microcontroller units (MCUs) including a Wemos S2 Mini, Wemos D1 Mini, and an ESP32 Devkit V1, each interfaced with an Adafruit MAX4466 Electret Microphone Amplifier for audio input and an LCD TFT screen for display output. The circuit is powered by Polymer Lithium Ion Batteries connected through TP4056 charging modules, with power management facilitated by push and rocker switches. The primary function of this circuit appears to be audio capture and processing with visual feedback.
Open Project in Cirkit Designer
This circuit features an ESP32 Devkit V1 microcontroller connected to a Micro SD Card Module for data storage, an Adafruit MAX9814 Electret Microphone Amplifier for audio input, and an Adafruit MAX98357A I2S Class-D Mono Amp connected to a loudspeaker for audio output. A pushbutton is interfaced with the ESP32 for user input. The circuit is likely designed for audio recording and playback with the capability to store the audio data on the SD card.
Open Project in Cirkit Designer
This circuit features an Arduino Nano interfaced with an Adafruit Audio FX Mini Sound Board, a SparkFun Electret Microphone Breakout, a TIP120 Darlington Transistor controlling a 12V Power LED, and a loudspeaker. The Arduino processes audio signals from the microphone to detect claps and toggles the LED accordingly, while also sending signals to the sound board to play audio tracks through the loudspeaker based on the clap pattern. The circuit is powered by a 12V power supply, with the Arduino and sound board receiving regulated voltage from the supply.
Open Project in Cirkit Designer| Pin Name | Description |
|---|---|
| AUD | Audio output signal |
| GND | Ground |
| VCC | Power supply (2.7V to 5.5V) |
| Gain | Gain adjustment (potentiometer onboard) |
Powering the Module:
Adjusting Gain:
Reading Audio Signal:
// Define the pin connected to the audio output
const int microphonePin = A0;
void setup() {
// Initialize serial communication at 9600 baud rate
Serial.begin(9600);
}
void loop() {
// Read the analog value from the microphone
int audioLevel = analogRead(microphonePin);
// Print the audio level to the Serial Monitor
Serial.println(audioLevel);
// Delay for a short period to avoid flooding the serial output
delay(10);
}
Q: Can I use this module with a 5V Arduino? A: Yes, the module can be powered with a 5V supply, making it compatible with 5V Arduinos.
Q: How do I adjust the gain on the module? A: Use a small screwdriver to turn the onboard potentiometer. Clockwise increases the gain, while counterclockwise decreases it.
Q: What is the purpose of the AUD pin? A: The AUD pin outputs the amplified audio signal from the microphone, which can be read by an analog input on a microcontroller.
Q: Can I connect this module directly to a speaker? A: No, the output is an analog signal meant for microcontroller ADCs. To drive a speaker, additional amplification is needed.
For further assistance, please refer to the SparkFun Electret Microphone Breakout product page and forums for community support and resources.