Speech Recognition Module

Speech Recognition Module

Overview

• Converts voice commands into digital signals

• Enables voice-controlled devices and automation

• Compact, easy to interface with Arduino, ESP32, or Raspberry Pi

Working Principle

• Microphone captures sound waves

• Analog-to-digital conversion of audio signals

• Speech recognition IC processes patterns

• Outputs digital signal or serial data for microcontroller

Key Specifications

• Number of Commands: 880 (varies by module)

• Recognition Modes: Single-word, Continuous speech

• Trigger: Voice-: Digital pins (HIGH/LOW), UART/Serial

• Voltage: 3.3V 5V DC

• Current: 2050 mA

Module Components

• Microphone

• Speech recognition IC

• Processing circuit & amplifier

• Communication interface (UART / GPIO / I2C)

Features

• Custom Command Training

• Supports multiple languages

• Low power consumption

• Easy integration with microcontrollers

Applications

• Voice-controlled robots

• Smart home automation

• IoT voice commands

• Hands-free devices

• DIY electronics experiments

Usage Tips< background noise for better accuracy

Use proper power supply (stable 5V)

Keep microphone clean & unobstructed

Advantages

• Simple microcontroller interface

• Reliable recognition for limited commands

• Compact and lightweight

• Energy-efficient

Limitations

• Limited vocabulary on basic modules

• Accuracy affected by background noise

• Advanced features require software training