4 layers51 × 51 mm
ESP32-S3
alisarpaksoy/ESP32-S3-Testboard
Custom ESP32-S3 test board designed in KiCad with USB-C, Si7021 temperature/humidity sensor, Qwiic I2C connector, RGB LED, and GPIO headers.
44 parts
4 layers50 × 50 mm
ESP32-S3-testboard
Imdad2005/ESP32-S3-testboard1Custom 4-layer ESP32-S3 IoT testboard designed in KiCad 9, featuring USB-C, 3.3 V power regulation, environmental sensing, and QWIIC/SPI expansion.
- Size
- 50 × 50 mm
- Copper layers
- 4
- Thickness
- 1.58 mm
- Parts
- 42
- Nets
- 56
- Pads
- 195
- Tracks, vias
- 373, 96
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 14 Oct 2026
- Updated
- 14 Oct 2026
Overview
ESP32-S3-testboard is an open-source printed circuit board by Imdad2005, from the Imdad2005/ESP32-S3-testboard repository on GitHub. It is a 4-layer board of 50 × 50 mm with 42 parts on 56 nets, routed with 373 tracks and 96 vias.
It is built around the ESP32-S3-WROOM-1-N8, SI7021-A20-GM and LM1117MP-3.3, with the USBLC6-2SC6 and BLM21PG220SN1 among its other parts. Its parts include 11 resistors, 8 capacitors, 6 diodes, 4 ICs and 4 connectors. It belongs with the home automation and IoT boards and the ESP32 boards of this library.
Main components
5
ESP32-S3-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -98.2dBm 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
SI7021-A20-GM
DFN-6-EP(3x3)DFN-6-EP(3x3) Temperature and Humidity Sensor ROHSSilicon LabsTemperature And Humidity Sensor
LM1117MP-3.3
SOT-2230℃~+125℃@(Ta) 1 1.2V@(800mA) 15V 3.3V 5mA 75dB@(120Hz) 800mA 99uVrms Fixed Over Current Protection、Over Temperature Protection Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
BLM21PG220SN1
08051 22Ω@100MHz 6A 9mΩ ±25% 0805 Ferrite Beads ROHSMurataFerrite Beads
README
README.mdESP32-S3 Testboard
A custom ESP32-S3 test and development board designed in KiCad 9 for embedded systems and IoT prototyping. Integrates the ESP32-S3-WROOM-1 module with power regulation, onboard sensing, programming interfaces, and peripheral expansion on a compact 50 × 50 mm PCB.
Board Preview
| Top | Bottom |
|---|---|
 |  |
Features
- ESP32-S3-WROOM-1 — Wi-Fi + Bluetooth module, 8 MB flash
- USB-C — power and programming interface with ESD protection
- Si7021-A20 — onboard temperature and humidity sensor
- QWIIC connector — I2C expansion for external sensors
- BOOT / RESET / User buttons
- RGB LED and 3.3 V power indicator LED
- 2×5 SPI expansion header
- 2×3 programming header
- 4× mounting holes (3.2 mm)
Power
| Rail | Source |
|---|---|
| 5 V | USB-C |
| 3.3 V | LM1117MP-3.3 voltage regulator |
PCB Specifications
| Parameter | Value |
|---|---|
| EDA Tool | KiCad 9 |
| Copper Layers | 4 |
| Board Dimensions | 50 × 50 mm |
| Mounting Holes | 4 × 3.2 mm |
Repository Structure
ESP32-S3-testboard/
├── hardware/
│ ├── ESP32-S3-testboard.kicad_pro
│ ├── ESP32-S3-testboard.kicad_sch
│ └── ESP32-S3-testboard.kicad_pcb
├── fabrications/
│ ├── BOM.csv
│ └── gerbers.zip
├── docs/
│ ├── ESP32-S3-testboard.pdf
│ ├── esp32-s3-wroom-2_datasheet_en.pdf
│ ├── pcb_top.png
│ └── pcb_bottom.png
├── .gitignore
└── README.mdTools
Author
Imdad Aqueel
B.Tech in Electronic and Communication Engineering, Bengaluru
Parts
42| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 1k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R5, R7, R8, R9 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 100n | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C2, C3, C7 |
| 3 | 10K | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R1, R4, R6 |
| 3 | ESD3.3 | Diode_SMD:D_SOD-923 | D2, D5, D6 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric | C4, C8 |
| 2 | 2.2k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R10, R11 |
| 2 | 22u | Capacitor_SMD:C_0805_2012Metric | C5, C6 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R2, R3 |
| 1 | 10u | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 1N5817 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 1 | BLM21PG220 | Inductor_SMD:L_0805_2012Metric | FB1 |
| 1 | BOOT | Button_Switch_SMD:SW_SPST_B3U-1000P | SW3 |
| 1 | CLV1L-FKB | LED_SMD:LED_Cree-PLCC4_3.2x2.8mm_CCW | D4 |
| 1 | Conn_01x04 | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J4 |
| 1 | Conn_02x03_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J3 |
| 1 | ESP32-S3-WROOM-1 | RF_Module:ESP32-S3-WROOM-1 | U2 |
| 1 | GREEN | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | LM1117MP-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | Pin_2x5 | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | J2 |
| 1 | Polyfuse 1A | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | RST | Button_Switch_SMD:SW_SPST_B3U-1000P | SW1 |
| 1 | Si7021-A20 | Package_DFN_QFN:DFN-6-1EP_3x3mm_P1mm_EP1.5x2.4mm | U4 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
| 1 | USER_SW | Button_Switch_THT:SW_Tactile_SPST_Angled_PTS645Vx31-2LFS | SW2 |
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Questions
How big is the ESP32-S3-testboard PCB?
It measures 50 × 50 mm and has 4 copper layers, 1.58 mm thick.
What parts does the ESP32-S3-testboard use?
42 parts, built around the ESP32-S3-WROOM-1-N8, SI7021-A20-GM, LM1117MP-3.3 and USBLC6-2SC6. 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-testboard KiCad files?
From the Imdad2005/ESP32-S3-testboard repository on GitHub, at the commit this page was made from: the board is hardware/ESP32-S3-testboard.kicad_pcb and its schematic hardware/ESP32-S3-testboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ESP32-S3-testboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask Imdad2005 before reusing the design.