2 layers103.8 × 50 mm
Galagino pcb set
harbaum/galagino
A Galaga, Pac-Man and Donkey Kong arcade emulator for the ESP32
26 parts558
2 layers55 × 70.5 mm
Treble
PuffyPufferfish0/trebleA hardware-based audio player built around the ESP32, utilizing a PCM5102A DAC for high-quality I2S digital audio output, a MicroSD card reader for storage, and an analog joystick for intuitive control.
- Size
- 55 × 70.5 mm
- Copper layers
- 2
- Thickness
- 1.58 mm
- Parts
- 5
- Nets
- 37
- Pads
- 57
- Tracks, vias
- 112, 0
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 28 May 2026
- Updated
- 26 Oct 2026
Overview
Treble is an open-source printed circuit board by PuffyPufferfish0, from the PuffyPufferfish0/treble repository on GitHub. It is a 2-layer board of 55 × 70.5 mm with 5 parts on 37 nets, routed with 112 tracks and 0 vias.
It is built around the ESP32-DEVKITC-VE. Its parts include 4 connectors and 1 IC. It belongs with the ESP32 boards of this library.
Main components
1README
README.mdESP32 I2S Audio Player -Treble
A hardware-based audio player built around the ESP32, utilizing a PCM5102A DAC for high-quality I2S digital audio output, a MicroSD card reader for storage, and an analog joystick for intuitive control.
Features
- High-Fidelity Audio: Hardware-decoded streaming via the PCM5102A DAC over the I2S bus.
- Expandable Storage: Reads audio files (e.g., 8MB
.mp3streams) directly from a MicroSD card via SPI. - Analog Navigation: KY-023 joystick integration for track/menu navigation, paired with a dedicated momentary trigger button.
- Custom PCB: Designed in KiCad to transition from a breadboard prototype to a clean, modular printed circuit board.
Hardware Components
- ESP32-DevKitC
- PCM5102A I2S DAC Module (Note: XSMT pin physically bridged to HIGH for hardware unmuting)
- MicroSD Card Adapter
- KY-023 Analog Joystick
- Momentary Push Button
Pin Mapping
| Component | Pin | ESP32 GPIO | Notes |
|---|---|---|---|
| PCM5102A DAC | BCK | GPIO 26 | I2S Bit Clock |
| DIN | GPIO 22 | I2S Data In | |
| LCK | GPIO 25 | I2S Word Select | |
| SCK | GPIO 13 | Driven LOW in software | |
| MicroSD Reader | MISO | GPIO 19 | VSPI Bus |
| MOSI | GPIO 23 | VSPI Bus | |
| CLK | GPIO 18 | VSPI Bus | |
| CS | GPIO 5 | VSPI Bus | |
| KY-023 Joystick | VRX | GPIO 32 | Analog Input (Powered via 3.3V) |
| VRY | GPIO 33 | Analog Input (Powered via 3.3V) | |
| Trigger Button | Pin 1 | GPIO 27 | Requires INPUT_PULLUP |
WARNING
this project is still in development
Software & Dependencies
This project is built using the Arduino IDE/PlatformIO for the ESP32.
- ESP32-audioI2S - Core library for I2S output and MP3 decoding.
- Standard
SPI.handSD.hlibraries for file system management.
- Breadboard prototyping and hardware debugging
- Hardware mute-bypass modification on DAC
- Schematic in KiCad
- PCB layout and routing
- Custom PCB fabrication and assembly
trebleIDE
An Electron application with React
Recommended IDE Setup
Project Setup
Install
$ npm installDevelopment
$ npm run devBuild
# For windows
$ npm run build:win
# For macOS
$ npm run build:mac
# For Linux
$ npm run build:linuxParts
5| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | ESP32-DevKitC | PCM_Espressif:ESP32-DevKitC | U1 |
| 1 | JOYSTICK | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical_SMD_Pin1Right | J3 |
| 1 | MICROSD_READER | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Horizontal | J2 |
| 1 | audio DAC | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Horizontal | J1 |
| 1 | button | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | J4 |
Questions
How big is the Treble PCB?
It measures 55 × 70.5 mm and has 2 copper layers, 1.58 mm thick.
What parts does the Treble use?
5 parts, built around the ESP32-DEVKITC-VE. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Treble KiCad files?
From the PuffyPufferfish0/treble repository on GitHub, at the commit this page was made from: the board is kicad/treble/treble.kicad_pcb and its schematic kicad/treble/treble.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Treble design in my own project?
Its repository states no licence, so its author keeps all rights: ask PuffyPufferfish0 before reusing the design.
Similar boards
- 2 layers115 × 75 mm
SpinCoater
RParkerE/OpenSilicon
OpenSilicon enables DIY semiconductor fabrication with open-source guides for building IC equipment at home. The project includes BOMs, 3D files, firmware, and PDKs, supporting makers and researchers in chip fabrication.
11 parts55GPL-3.0 - 2 layers127.3 × 54.1 mm
ESP32 SolarBox
cole8888/SRNE-Solar-Charge-Controller-Monitor
Read data from SRNE solar charge controllers.
34 parts42 - 2 layers62.2 × 57.1 mm
- 2 layers99.9 × 99.9 mm
- 2 layers
- 2 layers72.5 × 84.8 mm
Devboard
ste2425/PSP-Bluetooth-AVConnector
An AV-Out Breakout library for the PSP. Providing Kicad symbols and footprints to interface with the PSP 2/3K AVOut socket (also known as the TVOut socket)
13 parts12 - 2 layers100 × 88.9 mm
