Design with Adafruit PDM Mic with JST in Cirkit DesignerThe Adafruit PDM Mic with JST is a compact and versatile sound sensor module that captures high-quality audio signals using Pulse-Density Modulation (PDM). This microphone is ideal for a variety of applications, including sound detection, voice recognition, and audio recording in embedded systems. Its small form factor and simple interface make it a popular choice for hobbyists and professionals working on projects with microcontrollers like the Arduino UNO.
This circuit connects an Adafruit PDM microphone to an Arduino UNO for audio input processing. The microphone's VDD and GND pins are powered by the Arduino's 3.3V and GND pins, respectively. The microphone's CLK and DATA pins are connected to the Arduino's D3 and A0 pins, allowing the Arduino to receive and process the digital audio signal from the microphone.
Open Project in Cirkit Designer
This circuit features a Raspberry Pi Zero connected to an INMP441 MEMS microphone and a 1.3" OLED display. The Raspberry Pi Zero communicates with the OLED display via I2C (using GPIO2 for SDA and GPIO3 for SCL), and it interfaces with the INMP441 microphone using I2S (with GPIO4 for SCK, GPIO9 for L/R selection, ID_SD for SD, and GPIO12 for WS). The circuit is designed for audio input through the microphone and visual output on the OLED display, likely for applications such as sound visualization or audio monitoring.
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 is a portable audio-visual device featuring two Wemos microcontrollers for processing, Adafruit MAX4466 microphone amplifiers for audio input, and an LCD TFT screen for display. It includes power management with TP4056 modules and LiPo batteries, and user-controlled toggle and rocker switches.
Open Project in Cirkit Designer| Pin Number | Name | Description |
|---|---|---|
| 1 | SEL | Select pin for mode configuration (floating or tied to GND) |
| 2 | DAT | PDM data output |
| 3 | CLK | Clock input for PDM data |
| 4 | GND | Ground connection |
To use the Adafruit PDM Mic with JST in a circuit:
#include <PDM.h>
// Define the CLK and DAT pins
const int clkPin = 2; // Connect to CLK pin of the microphone
const int datPin = 3; // Connect to DAT pin of the microphone
// Buffer to store audio samples
short buffer[512];
void onPDMdata() {
// Callback function to process PDM data
int bytesAvailable = PDM.available();
PDM.read(buffer, bytesAvailable);
}
void setup() {
// Initialize serial communication
Serial.begin(9600);
// Configure the CLK and DAT pins
PDM.begin(clkPin, datPin);
// Set up the PDM microphone
PDM.setBufferSize(512);
PDM.onReceive(onPDMdata);
PDM.setGain(20);
PDM.setSampleRate(16000); // Set the sample rate to 16 kHz
}
void loop() {
// Main loop does nothing, audio processing is done in onPDMdata
}
Q: Can I use this microphone with a 5V microcontroller? A: Yes, the microphone can operate with 3.3V to 5V, but ensure that the logic levels for data and clock are compatible with your microcontroller.
Q: How do I change the sample rate?
A: The sample rate can be adjusted in the setup function using PDM.setSampleRate().
Q: What is the maximum distance the microphone can pick up sound? A: The effective range depends on the ambient noise and the sound volume. For clear audio, it is recommended to keep the source within a few feet of the microphone.
Remember to follow all safety precautions when working with electronic components and ensure that your work area is well-ventilated and free from static discharge.