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Microphone Sound Detection Sensor Blue

Microphone Sound Detection Sensor Blue

The Microphone Sound Detection Sensor Module acts like a microphone that detects sound and outputs digital signals based on an onboard Schmitt trigger circuit. This sensor is ideal for clap-activated projects, pet monitors, and other audio-triggered systems. It’s simple to use, affordable, and sensitive to a wide range of sound frequencies (50Hz–10kHz).

Package Includes:

  • 1 x Microphone Sound Detection Sensor Module (Blue)

12.00 AED 12.00 AED Tax Included
12.00 AED Tax Included

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Features:

  • Power-On LED: Indicates when the module is powered (LED1)
  • Electret Condenser Microphone (ECM): Captures sound signals from the environment
  • Output Status LED: (LED2) Illuminates when sound exceeds the threshold
  • Built-in Potentiometer: Allows adjustment of the digital output (DO) sensitivity threshold
  • Mounting Hole: Includes 3mm mounting hole for easy installation

Principle of Operation:

Sound waves cause the microphone diaphragm to vibrate, changing the capacitance and generating a voltage. This voltage is processed by the onboard comparator (LM393), which outputs a digital signal based on the preset threshold.

Pinout of the Module:

Microphone Sensor Pinout

  • VCC: Power supply (3.3V to 5V)
  • GND: Ground
  • OUT: Digital Output – LOW when sound is detected, HIGH otherwise

Applications:

  • Clap-activated switch projects
  • Sound-triggered LED or relay systems
  • Animal noise monitoring
  • Security systems

Circuit Diagram:

Circuit Diagram

Connect the module’s VCC and GND to 5V and GND on the Arduino. Connect OUT to digital pin 7.

Arduino Code Example:

#define sensorPin 7
unsigned long lastEvent = 0;

void setup() {
  pinMode(sensorPin, INPUT);
  Serial.begin(9600);
}

void loop() {
  int sensorData = digitalRead(sensorPin);

  if (sensorData == LOW) {
    if (millis() - lastEvent > 25) {
      Serial.println("Clap detected!");
    }
    lastEvent = millis();
  }
}

This code outputs "Clap detected!" to the Serial Monitor when a sound is detected.

Technical Details:

  • Mounting Hole Diameter: 3mm
  • Comparator IC: LM393
  • Power Supply: +5V
  • Dimensions: 35mm x 15mm x 14mm (L x W x H)
  • Color: Blue

 

Resources:

  • Tutorial 1 (watch for wiring and example use cases)

Comparison:

This module is perfect for binary (digital) sound detection without needing a microcontroller—just connect it directly to a relay. However, for analog sound level monitoring, consider a different sensor with analog output capabilities.

 

Features

  • LoRa SX1276 Wireless Module: Built around the SX1276 chip, the module employs LoRa technology, allowing for long-range data transmission and excellent penetration capabilities.
  • Configurable Output Power: The module's output power can be adjusted from +13 to +20 dBm (up to 100 mW) through software settings, providing flexibility in balancing communication distance and power consumption.
  • Low Power Consumption: During transmission, power consumption ranges from 50mA (+13 dBm) to 150mA (+20dBm), while in listening mode, it requires approximately 30mA, making it energy-efficient for battery-operated applications.
  • AES-128 Encryption Support: The module offers AES-128 encryption, ensuring secure and private data transmission, making it suitable for applications that require data confidentiality.
  • Multipoint Network Capabilities: It supports multipoint networks, allowing the establishment of individual nodes within the network for seamless and efficient communication.
  • Wide Power Supply Range: The module can be powered with a voltage range from 3V to 5V, making it compatible with various power sources and microcontrollers.

NOTE: It is important to solder a 16cm length of cable to the antenna pin before using it since not connecting any antenna can damage it. Optionally, the board has pads to solder an SMA connector with antenna thread.

Specifications

  • LoRa SX1276 wireless module with SPI interface (900 MHz)
  • Output power: +13 to +20 dBm up to 100 mW configurable by software
  • Consumption: 50mA (+13 dBm) to 150mA (+20dBm) in transmission, approx 30mA in listening
  • Supports AES-128 encryption
  • Supports multipoint networks with individual nodes
  • Power: 3 to 5V