Wroom board
About the Wroom board
Wroom board is an open source ESP32 PCB design by SinaKarvandi, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 100 × 100 mm, with 59 components from 32 distinct parts.
Its main chip is the ESP32-WROOM-32D, from the ESP32 family. Other key parts include the USBLC6-2P6, CP2104, Si7021-A20, 74AHCT245 and TLV1117LV-3.3. By type, the board carries 20 resistors, 16 capacitors, 6 ICs, 6 connectors, 4 diodes and 2 transistors.
From the project
Blue Pill PCB
Custom PCB design for STM32 "Blue Pill" development board.
Schematic and layout for ESP32-S3-based design.
Simple circuit for testing LEDs and basic PCB workflow.
Main components on the Wroom board
Wroom board bill of materials (BOM)
59 components, 32 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-WROOM-32D | ESP32-WROOM-32D | U1 |
| 1 | USBLC6-2P6 | SOT-666 | U2 |
| 1 | CP2104 | QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U3 |
| 1 | Si7021-A20 | DFN-6-1EP_3x3mm_P1mm_EP1.5x2.4mm | U4 |
| 1 | 74AHCT245 | DIP-20_W7.62mm | U5 |
| 1 | TLV1117LV-3.3 | SOT-223-3_TabPin2 | U6 |
| 1 | UMH3N | SOT-363_SC-70-6 | Q1 |
| 1 | BC817 | SOT-23 | Q2 |
| 1 | USB_C_Receptacle_USB2.0_16P | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | Conn_01x04_Pin | JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J2 |
| 1 | Screw_Terminal_01x03 | TerminalBlock_Phoenix_MKDS-3-3-5.08_1x03_P5.08mm_Horizontal | J3 |
| 1 | Screw_Terminal_01x08 | TerminalBlock_Phoenix_MKDS-1,5-8-5.08_1x08_P5.08mm_Horizontal | J4 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J5 |
| 1 | Conn_02x05_Odd_Even | PinHeader_2x05_P2.54mm_Vertical | J6 |
| 1 | Fuse | Fuse_1206_3216Metric | F1 |
| 1 | Polyfuse_1Amp | Fuse_1206_3216Metric | F2 |
| 1 | RT314A05 | Relay_SPDT_Schrack-RT1-16A-FormC_RM5mm | K1 |
| 1 | SW_SPST | SW_Push_1P1T_NO_CK_KMR2 | SW1 |
| 1 | LL4148 | D_MiniMELF | D1 |
| 1 | YELLOW | LED_0603_1608Metric | D2 |
Show 12 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LED_RGBA | LED_RGB_Wuerth-PLCC4_3.2x2.8mm_150141M173100 | D3 |
| 1 | GREEN | LED_0603_1608Metric | D4 |
| 1 | BLM21PG221 | L_0805_2012Metric_Pad1.05x1.20mm_HandSolder | FB1 |
| 1 | 1000u/25V | CP_Radial_D10.0mm_P5.00mm | C1 |
| 7 | 100n | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C2, C6, C10, C12, C14, C15, C16 |
| 2 | 4u7 | C_0805_2012Metric | C3, C7 |
| 6 | 22u | C_0805_2012Metric | C4, C5, C8, C9, C11, C17 |
| 2 | 5K1 | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R1, R2 |
| 4 | 10K | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R3, R7, R14, R15 |
| 6 | 22R | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R4, R5, R18, R19, R20, R21 |
| 6 | 1K | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R6, R8, R9, R10, R16, R17 |
| 2 | 4K7 | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R11, R12 |
Wroom board design files
The KiCad project lives in the SinaKarvandi/PCB-Designs repository on GitHub; these links point at the commit this page was built from.
Wroom board: common questions
What microcontroller does the Wroom board use?
The Wroom board is built around the ESP32-WROOM-32D, from the ESP32 family.
How big is the Wroom board?
The Wroom board measures 100 × 100 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Wroom board?
59 components, from 32 distinct parts. The full bill of materials is listed on this page.
Where can I download the Wroom board design files?
From the SinaKarvandi/PCB-Designs repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Wroom board design in my own project?
Yes, under the terms of its GPL-3.0 license, which SinaKarvandi chose for the repository.
Can I test firmware for the Wroom board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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