4 layers122 × 76 mm
ESP iRadio
hghaken/ESP-iRadio
ESP32 internet radio with Bluetooth A2DP output (headphones/speaker), 1.69" display and web control
122 partsGPL-3.0
2 layers29 × 45.3 mm
Spark devboard rf
emb3rcia/spark-devboard-rfRF focused devboard based on ESPRESSIF ESP32-WROVER-IE-N16R8 allowing Wi-Fi b/g/n, Bluetooth 4.2 Classic and Bluetooth 4.2 BLE communication using external u.FL antena
- Size
- 29 × 45.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 15
- Nets
- 45
- Pads
- 124
- Tracks, vias
- 273, 44
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 8 Apr 2026
- Updated
- 8 Apr 2026
Overview
Spark devboard rf is an open-source printed circuit board by emb3rcia, from the emb3rcia/spark-devboard-rf repository on GitHub. It is a 2-layer board of 29 × 45.3 mm with 15 parts on 45 nets, routed with 273 tracks and 44 vias.
It is built around the ESP32-WROVER-IE-N16R8, ESDA5V3L and SMAJ5.0A. Its parts include 3 capacitors, 3 resistors and 2 connectors. It belongs with the radio and wireless and microcontroller boards boards and the ESP32 boards of this library.
Main components
3
ESP32-WROVER-IE-N16R8
SMD,31.4x18mm-40℃~+85℃ -97dBm 2.4GHz 20.5dBm 3V~3.6V Bluetooth4.2 ESP32-D0WD-V3 IPEX interface UART、SDIO、SPI、I2C、GPIO SMD,31.4x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
ESDA5V3L
SOT-23-40℃~+125℃@(Tj) 15A@2.5us 2 220pF 2uA 300W 3V 5.3V 5.3V ESD IEC 61000-4-2 Unidirectional SOT-23 ESD and Surge Protection (TVS/ESD) ROHSSTMicroelectronicsESD And Surge Protection (TVS/ESD)
SMAJ5.0A
DO-214AC(SMA)-65℃~+150℃ 400W@10/1000us 43.5A 5V 7V 800uA 9.2V TVS Unidirectional DO-214AC(SMA) ESD and Surge Protection (TVS/ESD) ROHSMDDESD And Surge Protection (TVS/ESD)
README
README.mdspark-debug
Navigation
About project
spark-devboard-rf is RF focused devboard based on ESPRESSIF ESP32-WROVER-IE-N16R8 allowing Wi-Fi b/g/n, Bluetooth 4.2 Classic and Bluetooth 4.2 BLE communication using external u.FL antena
Motivation for the project
spark-devboard-rf was created from boreness, but also as a stepping stone before using the same module in upcoming audio player of mine
Pin functions
Pin functions are written on back of the PCB. Alternate functions can be found in this datasheet
Usage
You use it as any other developement board. Important caveats are programming and powering the board.
Programming
You need to program this board via UART interface specified on the back side of PCB. To enter flashing mode you need to hold BOOT button during power on or resetting the board
Powering
Board can be either powered by 5x 3.3V pins on board, where you need to supply minimum of 500 mA for board to work properly, or via USB-C power-only port on board, where the pins become 3.3V output. It is important to make sure that you are powering the board from only one supply method at the time
Directory overview
- 3D file of PCB is available in
/3D - KiCad project files are available in
/KiCad Project Files - Gerber files are available in
/Gerbers
Development tools
- KiCad for EDA work
Features
- ESP32 module with 8MB PSRAM and 16MB flash
- u.FL antenna slot
- USB-C port for power
- Integrated 3.3V LDO
Images
Schematic
PCB editor view
3D viewer top side
3D viewer bottom side
License
PCB / Schematic License
All files in /PCB, /Schematic and /Gerbers folders and their subsequent subfolders are licensed under the CERN Open Hardware License v2 (Weakly Reciprocal).
See /Licenses/CERN-OHL.txt for full terms.
3D files, images and documentation License
All files in /3D, /Images and /Docs folders and their subsequent subfolders are licensed under the CC-BY 4.0 License.
See /Licenses/CC-BY-4.0.txt for full terms
BOM
| Name | Purpose | Quantity | Total Cost (USD) | Link | Distributor |
|---|---|---|---|---|---|
| PCB | PCB | 5 | 2.10 | JLCPCB | |
| MOLEX 206994-0100 | Antenna for connectivity | 1 | 2.38 | https://www.tme.eu/pl/details/2069940100/anteny-wifi-bluetooth/molex/206994-0100/ | TME |
| ESP32-WROVER-E-N16R8 | MCU module | 1 | 6.40 | https://www.tme.eu/pl/details/esp32-wrover-e-16/moduly-iot-wifi-bluetooth/espressif/esp32-wrover-e-n16r8/ | TME |
| SHOU HAN TYPE-C 16PIN 2MD(073) | USB-C power port | 1 | 0.00 | https://www.lcsc.com/product-detail/C2765186.html?s_z=n_C2765186 | LCSC |
© 2026 emb3rcia
Hardware: CERN OHL v2 3D & Images: CC BY 4.0
Parts
15| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 5.1kOhm | Resistor_SMD:R_0603_1608Metric | R2, R3 |
| 2 | Conn_01x15_Pin | Connector_PinHeader_2.54mm:PinHeader_1x15_P2.54mm_Vertical | J1, J2 |
| 2 | TS6643TP 250GF 009 | easyeda2kicad:SW-SMD_4P-L6.2-W6.0-P4.50-LS9.0 | BOOT_BUTTON1, NRST_BUTTON1 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 10kOhm | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 22uF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | ESDA5V3L | ESDA5V3L:SOT-23_STM | CC_TVS1 |
| 1 | ESP32-Wrover-IE-N16R8 | ESP32WroverIEN16R8:ESP32WroverIEN16R8 | MCU1 |
| 1 | LD1117AS33TR | LD1117AS33TR:SOT230P700X190-4N | LDO1 |
| 1 | SMAJ5.0A | SMAJ5.0A:DIOM4325X250N | VBUS_TVS1 |
| 1 | TYPE-C 16PIN 2MD(073) | easyeda2kicad:USB-C-SMD_TYPE-C-6PIN-2MD-073 | USB1 |
Questions
How big is the Spark devboard rf PCB?
It measures 29 × 45.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Spark devboard rf use?
15 parts, built around the ESP32-WROVER-IE-N16R8, ESDA5V3L and SMAJ5.0A. 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 Spark devboard rf KiCad files?
From the emb3rcia/spark-devboard-rf repository on GitHub, at the commit this page was made from: the board is KiCad Project Files/spark-devboard-rf.kicad_pcb and its schematic KiCad Project Files/spark-devboard-rf.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Spark devboard rf design in my own project?
Its repository states no licence, so its author keeps all rights: ask emb3rcia before reusing the design.
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