Custom ESP32 Audio Tinker PCB

I created this ESP32 Audio board to make common projects easier: for example, retrofitting an old radio to stream MP3s, interactive talking toys, or making a home automation announcement box.

Project Specs

• ESP32-WROVER Microcontroller, 16MB Flash, 8MB PSRAM
• 256kb/s MP3 capable output, 3w mono audio amp built-in
• Slide power switch and USB/Battery source switching
• SD card slot allows local storage of audio library, and several playback modes that work like virtual radio stations across different presets organized in folders
• 3.3v Regulator and reverse polarity protection
• Optional I2S microphone support
• PCB integrates I2S audio, GPIO, an I2C connector (QWIK) and level-shifted Neopixel port (WS2812, 5V)
• Flexible web configuration software with a nice UI, integrated with radio libraries online
• Open source, manually configurable, community supported

The Working prototype board, assembled:

PCB Close-up Details: