Mini SD Card MP3 Sound Module WTV020-SD-16P

Product Description

The Mini SD Card MP3 Sound Module WTV020-SD-16P is a compact audio playback module designed to add voice and sound functionality to Arduino, PIC, and other microcontroller-based projects. It supports audio files stored on an SD card and provides simple control through a microcontroller or external keys.

The module supports 4-bit ADPCM/AD4 and WAV audio formats and can automatically recognize stored voice files. It allows individual voice segments to be selected and played, as well as supporting combination playback for creating customized audio sequences.

With its compact design, easy operation, and low storage requirements, the module is suitable for DIY electronics, robotics, interactive projects, voice prompts, alarms, and educational applications.

Note: This product is available in the WTV020-SD-16P variant. The HW-251 board may be supplied depending on the product version; its working functionality remains the same.

Features

• WTV020-SD-16P audio playback module
• Supports SD card storage
• Supports FAT file system
• Supports 4-bit ADPCM/AD4 audio
• Supports WAV audio
• Automatic voice-file recognition
• Microcontroller control
• Key-control support
• Supports individual voice segment playback
• Supports combination playback
• Supports mute combinations
• Retains operating data when power is removed
• Compact and space-saving design
• Suitable for Arduino and PIC projects
• No special software required to load voice files onto the SD card

Specifications

Parameter	Specification
Product Type	Mini SD Card Sound Module
Variant	WTV020-SD-16P
Storage	SD Card
Maximum SD Card Capacity	Up to 1GB
File System	FAT
Audio Formats	AD4 / WAV
AD4 Sampling Rate	6kHz–32kHz, 36kHz
WAV Sampling Rate	6kHz–16kHz
Control	Microcontroller / Key
Playback	Individual / Combination
Application	Voice & Sound Playback

Working Principle

Audio files are stored on a compatible SD card and automatically recognized by the module. A microcontroller or connected keys can then control the playback of individual voice segments or combinations of stored audio files.

The module processes the stored audio and provides the corresponding sound output, allowing voice and sound playback to be added to an electronic project without requiring complex audio-processing circuitry.

Applications

• Arduino projects
• PIC microcontroller projects
• Robotics
• Voice prompt systems
• Interactive electronics
• DIY audio projects
• Educational projects
• Electronic toys
• Alarm systems
• Voice notifications
• Automated announcements
• Interactive displays
• Embedded sound systems

Package Includes

• 1 × Mini SD Card MP3 Sound Module

Product Disclaimer

This product is available as the WTV020-SD-16P variant. The HW-251 board designation may vary depending on the supplied hardware version, while the working functionality remains the same.

Product images are for representation purposes only. The actual product may vary slightly in colour, PCB layout, components, or appearance depending on the manufacturing batch.

For detailed technical specifications, file naming requirements, pin configuration, and operating instructions, refer to the datasheet provided with the product.