Dev board
About the Dev board
Dev board is an open source ESP32 PCB design by rajeev2705, published on GitHub. It is a 2-layer board measuring 67.2 × 45.4 mm, with 106 components from 49 distinct parts.
Its main chip is the ESP32-S3-WROOM-2, from the ESP32 family. Other key parts include the TP4056-42-ESOP8, MT3608, W5500, USBLC6-2SC6 and ULN2003. By type, the board carries 42 resistors, 39 capacitors, 8 ICs, 6 connectors, 5 inductors and 2 diodes.
It belongs with the dev boards & breakouts designs in this gallery.
From the project
Welcome to my PCB projects repository! This space is dedicated to documenting my journey in designing, creating, and improving printed circuit boards (PCBs). Here, I share various PCB projects, including schematics, layouts, bill of materials (BOM), and relevant documentation.
Main components on the Dev board
Dev board bill of materials (BOM)
106 components, 49 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TP4056-42-ESOP8 | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm_ThermalVias | U1 |
| 1 | MT3608 | SOT-23-6 | U2 |
| 1 | W5500 | LQFP-48_7x7mm_P0.5mm | U3 |
| 1 | ESP32-S3-WROOM-2 | ESP32-S3-WROOM-2 | U4 |
| 1 | USBLC6-2SC6 | SOT-23-6 | U5 |
| 1 | ULN2003 | SOIC-16W_5.3x10.2mm_P1.27mm | U6 |
| 1 | MAX98357A | TQFN-16-1EP_3x3mm_P0.5mm_EP1.23x1.23mm | U7 |
| 1 | TPS563208DDCR | SOT95P280X110-6N | U8 |
| 1 | AO3401A | SOT-23 | Q2 |
| 1 | 25MHz | Crystal_SMD_HC49-SD | Y1 |
| 1 | TYPE-C-31-M-12 | HRO_TYPE-C-31-M-12 | J1 |
| 1 | RJ45_Hanrun_HR911105A_Horizontal | RJ45_Hanrun_HR911105A_Horizontal | J2 |
| 1 | 7 Segment | JST_EH_B4B-EH-A_1x04_P2.50mm_Vertical | J3 |
| 1 | MIC | JST_EH_B5B-EH-A_1x05_P2.50mm_Vertical | J5 |
| 1 | B4B-PH-K-S | JST_EH_B4B-EH-A_1x04_P2.50mm_Vertical | J6 |
| 1 | Potentiometer | JST_EH_B3B-EH-A_1x03_P2.50mm_Vertical | J7 |
| 2 | TS-1088-AR02016 | SW_SPST_B3U-1000P | BOOT1, RESET1 |
| 2 | SS14 | D_SMA | D3, D4 |
| 1 | FerriteBead_Small | L_0603_1608Metric | FB1 |
| 2 | Ferrite Bead 0603 600Ω @100MHz ≥1A | L_0603_1608Metric | FB2, FB3 |
Show 29 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 22uH | L_10.4x10.4_H4.8 | L1 |
| 1 | 2.2uH 15mOhm | IND_SPM6530T-2R2M | L2 |
| 6 | 10uf | C_0603_1608Metric | C1, C5, C8, C28, C37, C38 |
| 13 | 0.1uf | C_0603_1608Metric | C2, C6, C7, C11, C12, C13, C14, C15 +5 |
| 2 | 18pf | C_0603_1608Metric | C3, C4 |
| 1 | 4.7uf | C_0603_1608Metric | C9 |
| 2 | 10nf | C_0603_1608Metric | C10, C20 |
| 7 | 1uf | C_0603_1608Metric | C16, C17, C27, C31, C33, C34, C36 |
| 1 | 10uf 16V | CP_EIA-3216-18_Kemet-A | C18 |
| 1 | 1nf 2KV | C_1206_3216Metric | C19 |
| 2 | 6.8nf | C_0603_1608Metric | C21, C22 |
| 1 | 22nf | C_0603_1608Metric | C24 |
| 3 | 22uf | C_0603_1608Metric | C40, C41, C42 |
| 3 | 5.1K | R_0603_1608Metric | R1, R6, R38 |
| 14 | 10k | R_0603_1608Metric | R2, R3, R8, R9, R10, R13, R14, R15 +6 |
| 1 | 0R | R_0603_1608Metric | R4 |
| 1 | 1M | R_0603_1608Metric | R5 |
| 1 | 3k | R_0603_1608Metric | R7 |
| 1 | 15k | R_0603_1608Metric | R11 |
| 1 | 2k | R_0603_1608Metric | R12 |
| 1 | 12.4k | R_0603_1608Metric | R20 |
| 2 | 330 | R_0603_1608Metric | R21, R26 |
| 4 | 33 | R_0603_1608Metric | R22, R23, R24, R25 |
| 2 | 49.9 | R_0603_1608Metric | R27, R29 |
| 2 | 49.1 | R_0603_1608Metric | R28, R32 |
| 2 | 100R | R_0603_1608Metric | R30, R31 |
| 5 | 22R | R_0603_1608Metric | R33, R35, R40, R41, R42 |
| 1 | 10 | R_0603_1608Metric | R34 |
| 1 | 33.2k | R_0603_1608Metric | R47 |
Dev board design files
The KiCad project lives in the rajeev2705/PROJECTS repository on GitHub; these links point at the commit this page was built from.
Dev board: common questions
What microcontroller does the Dev board use?
The Dev board is built around the ESP32-S3-WROOM-2, from the ESP32 family.
How big is the Dev board?
The Dev board measures 67.2 × 45.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Dev board?
106 components, from 49 distinct parts. The full bill of materials is listed on this page.
Where can I download the Dev board design files?
From the rajeev2705/PROJECTS repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Dev board design in my own project?
The repository has no license, so all rights stay with rajeev2705. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Dev 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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