ESP32 Hi-Fi Boombox: I2S Audio & Power Management Suite

This isn't just another ESP32 breakout; it is a fully integrated audio engine featuring dual-channel I2S amplification, smart LED visualization, and a rock-solid power delivery system designed to squeeze every watt out of the MAX98357A.

Technical Specifications

• Processor ESP32-WROOM Series (Integrated Bluetooth/Wi-Fi)
• Audio DAC/Amp 2x MAX98357A (Left & Right Channel separation)
• Output Power 3.2W at 4Ω / 1.8W at 8Ω (per channel)
• Power Input USB-C with CC Resistor Coding (5V/3A negotiation)
• LED Peripherals 2x On-board Headers for WS2812B (8 LEDs per strip)
• Audio Protocol Digital I2S for noise-free transmission

Safety & Power Engineering

To ensure your battery and speakers stay healthy, the circuit includes:

• OVP (Over-Voltage Protection): Shuts down the rail if a faulty charger is detected.
• UVP (Under-Voltage Protection): Prevents deep discharge of your Li-ion source.
• Reverse Polarity Protection: Because mistakes happen.
• Dedicated 5V Rail: Boosted and filtered to ensure the amps have the headroom they need for peak transients.

Visuals: VU Metering Ready

The board includes dual 3-pin headers specifically mapped for two 8-LED smart strips. Use the provided sample code to turn these into high-speed VU meters that react to the I2S stream in real-time