This project is a wireless MP3 player system designed with two complementary units: a Main Player Block and a Cube Storage Module. The system blends modern wireless technology with a playful, modular design that can serve both as an educational toy and as a unique gadget for adults.

Main Player Block

The Main Board is powered by the ESP32-WROOM-32E-N4, handling wireless communication and real-time MP3 playback. It integrates a complete control panel with buttons for Play, Pause, Stop, Next, Previous, Volume Up, and Volume Down, offering intuitive music navigation.

For audio output, the block includes the PCM5100APWR DAC for high-fidelity digital-to-analog conversion, paired with the PAM8908JER amplifier for clean and powerful sound. Power is managed by an AMS1117-3.3 regulator and supplied via USB Type-C.

Additionally, the Main Block integrates a wireless power transmitter (NXQ1TXH5/101J), enabling it to power the Cube without physical connectors.

Cube Storage Module

The Cube Module is a compact, detachable unit built around the ESP32-WROOM-32E-N4, with an SD card for storing MP3 files. It streams audio wirelessly to the Main Block, making the system completely cable-free.

The Cube is powered wirelessly by the block through the BQ51013BRHLR receiver IC, which captures energy from the transmitter and regulates it via an AMS1117-3.3.

The Cube is designed to be placed under the Main Block, where the wireless power and data communication are seamlessly activated. Both units feature a cool and playful design, making the product visually engaging and interactive.

Key Features

• Dual-unit modular system: Main Player Block + Cube Storage Module
• ESP32-WROOM-32E-N4 on both boards for wireless communication and control
• High-quality audio via PCM5100A DAC and PAM8908 amplifier
• Full control buttons for music playback and volume adjustment
• Wireless power transfer: NXQ1TXH5 transmitter + BQ51013B receiver
• Cube stores MP3 files on SD card and streams wirelessly to the block
• Cube must be placed under the block for activation
• Attractive, fun design: works as an educational toy or as a creative adult gadget

Innovation

This project combines wireless audio streaming with contactless power transfer in a modular, user-friendly design. By merging high-quality audio hardware, ESP32 connectivity, and playful aesthetics, it creates a new way to experience music while being both entertaining and educational.