WTV020SD Voice Module – SD Card Audio Playback Module

WTV020SD Voice Module – SD Card Audio Playback Module for DIY & Embedded Projects

The WTV020SD Voice Module is a compact and cost-effective audio playback solution designed for microcontroller-based projects, DIY electronics, and embedded systems. This module allows you to store and play voice or sound files directly from a Micro SD card, making it ideal for applications such as voice prompts, alarms, toys, and interactive devices.

With simple control via GPIO pins, the WTV020SD module is easy to integrate into Arduino, AVR, and other microcontroller platforms.

Key Features

• Micro SD Card Support – Store and play audio files directly from TF card
• Compact Design – Small footprint for easy integration
• Simple Control Interface – Trigger playback via IO pins
• Low Power Consumption – Suitable for battery-powered projects
• Multiple Playback Modes – Supports key control and serial control
• Onboard Audio Output – Connect directly to speaker or amplifier

Technical Specifications

• Model: WTV020SD
• Audio Format: AD4 (special format required)
• Storage: Micro SD / TF Card (up to 2GB recommended)
• Operating Voltage: 2.8V – 3.6V DC
• Output Type: PWM / DAC audio output
• Control Method: IO trigger / serial control
• Typical Current: Low power consumption design

Applications

• Voice prompts and announcements
• Game consoles and toys
• Alarm and alert systems
• DIY electronics projects
• Educational kits and learning modules
• Interactive displays and exhibits

Important Notes

• Audio files must be converted to AD4 format before use
• Works best with smaller capacity SD cards (≤2GB)
• External amplifier may be required for louder output
• Ensure correct voltage (3.3V) – not directly 5V tolerant

Why Choose the WTV020SD Module?

The WTV020SD is a simple and affordable voice playback solution for projects that require basic audio functionality. Its small size, low power consumption, and straightforward control make it ideal for both beginners and developers building interactive or audio-enabled systems.