4 layers26.4 × 49.4 mm
RP2040 Dev
CafeAsh/DevBoards
Development board based on the ATmega32U4 microcontroller, designed for USB-enabled embedded projects, rapid prototyping, and firmware experimentation.
40 parts
4 layers28.6 × 48.5 mm
ESP32-S3 Dev
CafeAsh/DevBoardsDevelopment board based on the ATmega32U4 microcontroller, designed for USB-enabled embedded projects, rapid prototyping, and firmware experimentation.
- Size
- 28.6 × 48.5 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 30
- Nets
- 55
- Pads
- 177
- Tracks, vias
- 317, 60
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 17 Nov 2025
- Updated
- 19 Aug 2026
Overview
ESP32-S3 Dev is an open-source printed circuit board by CafeAsh, from the CafeAsh/DevBoards repository on GitHub. It is a 4-layer board of 28.6 × 48.5 mm with 30 parts on 55 nets, routed with 317 tracks and 60 vias.
It is built around the TPD2E1B06DRLR-TP, PTVS5V0Z1USKPYL and USB4105-GF-A. Its parts include 10 resistors, 7 capacitors, 3 ICs, 3 diodes and 3 connectors. It belongs with the ESP32 boards of this library.
Main components
3
TPD2E1B06DRLR-TP
SOT(5x3)-55℃~+125℃ 0.6pF 15V 5.5V 80nA 9.5V ESD IEC 61000-4-2、IEC 61000-4-5 SOT(5x3) ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
PTVS5V0Z1USKPYL
0603-40℃~+125℃ 12V 200W 200nA 20A 5V 6.4V IEC 61000-4-2、IEC 61000-4-5 TVS Unidirectional 0603 ESD and Surge Protection (TVS/ESD) ROHSNexperiaESD And Surge Protection (TVS/ESD)
USB4105-GF-A
SMD-40℃~+85℃ 1 12P 48V 5A Black Female Surface Mount, Right Angle Type-C USB 2.0 SMD USB Connectors ROHSGlobal Connector Technology (GCT)USB Connectors
README
ATmega32u4_Dev/README.mdATmega32U4 Development Board
Development board based on the ATmega32U4 microcontroller, designed for USB-enabled embedded projects, rapid prototyping, and firmware experimentation.
Overview
This project provides a hardware platform built around the ATmega32U4, a microcontroller with native USB support.
Ideal use cases include:
- USB HID devices (keyboards, mice, gamepads)
- Serial communication over USB (CDC)
- Custom USB devices
- General embedded applications
Features
- ATmega32U4 microcontroller
- Native USB support (no external USB-to-UART chip required)
- On-board 5V voltage regulation
- Power and Dataline surge protection
- ISP programming header
- Power Status LED
- Programable on board LED (Pin 13)
- GPIO breakout pins
- 16MHz Crystal Oscillator
- Designed to fit standard breadboards
Microcontroller Details
- Core: AVR 8-bit
- Flash Memory: 32 KB
- SRAM: 2.5 KB
- EEPROM: 1 KB
- Clock Speed: 16 MHz
- Interfaces:
- USB 2.0 Full Speed
- UART
- SPI
- I2C (TWI)
Pinout
Pinout leaves some to be desired. Future re-works will better address pin layout
Parts
30| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 0.1u | Capacitor_SMD:C_0402_1005Metric | C3, C4, C6, C7 |
| 4 | 10K | Resistor_SMD:R_0402_1005Metric | R7, R8, R9, R10 |
| 2 | 10u | Capacitor_SMD:C_0402_1005Metric | C1, C5 |
| 2 | 22 | Resistor_SMD:R_0402_1005Metric | R5, R6 |
| 2 | 5K1 | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | Conn_01x17_Pin | Connector_PinHeader_2.54mm:PinHeader_1x17_P2.54mm_Vertical | J1, J3 |
| 2 | SW_Push | Resistor_SMD:R_0402_1005Metric | SW1, SW2 |
| 1 | 1.2K | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 22u | Capacitor_SMD:C_0402_1005Metric | C2 |
| 1 | 4.7K | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | AMS1117CS-3.3 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | ESP32-S3-WROOM-2 | RF_Module:ESP32-S3-WROOM-2 | U3 |
| 1 | LED_GREEN | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | LED_RED | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | LOGO | Footprints:Coffee4.4W | G*** |
| 1 | PTVS5V0Z1USKP | Diode_SMD:Nexperia_DSN1608-2_1.6x0.8mm | D1 |
| 1 | Polyfuse | Fuse:Fuse_0603_1608Metric | F1 |
| 1 | TPD2E1B06DRLR | Footprints:SOTFL50P160X60-6N | U1 |
| 1 | USB4105-GF-A | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J2 |
Questions
How big is the ESP32-S3 Dev PCB?
It measures 28.6 × 48.5 mm and has 4 copper layers, 1.6 mm thick.
What parts does the ESP32-S3 Dev use?
30 parts, built around the TPD2E1B06DRLR-TP, PTVS5V0Z1USKPYL and USB4105-GF-A. 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 ESP32-S3 Dev KiCad files?
From the CafeAsh/DevBoards repository on GitHub, at the commit this page was made from: the board is ESP32-S3_Dev/ESP32-S3_Dev.kicad_pcb and its schematic ATiny1616_Dev/ATiny1616_Dev.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ESP32-S3 Dev design in my own project?
Its repository states no licence, so its author keeps all rights: ask CafeAsh before reusing the design.
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