WTV020-SD Mini SD Card MP3 Sound Module

WTV020‑SD Mini MP3 Sound Module – a compact, plug‑and‑play board that reads MP3, WAV or OGG files from a standard micro‑SD card and outputs them through a speaker or headphones. Designed for the Sound and Vibration Sensors family, the module fits on a breadboard or inside a 3‑D‑printed enclosure and works with any Arduino‑compatible board, Raspberry Pi Pico, ESP32, or micro:bit. With just a few lines of code you can trigger voice prompts, musical cues, or real‑time audio feedback, turning silent projects into interactive experiences.

Students who experiment with the WTV020‑SD will learn how digital audio is stored, decoded, and converted into analog sound, explore the basics of serial communication (UART), and practice designing circuits that blend sensors, actuators, and code. Key features include:

• Micro‑SD slot for up to 32 GB of audio files
• UART interface (TX, RX, VCC, GND) for effortless integration
• Built‑in amplifier (optional external speaker) for clear playback up to 3 W
• Low power consumption (≈ 30 mA idle) and sleep mode for battery‑operated projects
• Configurable playback (single‑track, loop, random) via simple command set

Because it bridges electronics, programming, and creative media, the module is a perfect STEAM tool: learners can prototype talking robots, interactive art installations, language‑learning toys, or data‑sonification projects while reinforcing concepts in physics (sound waves), computer science (file handling, state machines), engineering (circuit design), and the arts (audio storytelling). Its tiny footprint and plug‑and‑play nature let teachers focus on discovery rather than wiring, making it an engaging, versatile centerpiece for any classroom or makerspace.