Export board
About the Export board
Export board is an open source ESP32 PCB design by zeugmaster, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 60 × 110 mm, with 127 components from 62 distinct parts.
Its main chip is the ESP32-C3-WROOM-02-N4, from the ESP32 family. Other key parts include the TP4054-42-SOT25R, SY8089AAAC, USBLC6-2SC6, TLV803EA30DBZR and PN7160A1HN/C100E. By type, the board carries 54 capacitors, 42 resistors, 9 ICs, 5 transistors, 5 connectors and 4 diodes.
It belongs with the keyboards and displays & leds designs in this gallery.
From the project
Nucula Board: an ESP32-C3 hardware prototype with USB-C, PN7160 NFC, OLED and detachable keyboard. KiCad sources and manufacturing files.
Upload nucula-v2-gerbers.zip. Order five bare four-layer FR-4 boards, nominal 1.6 mm, green mask, white legend, ENIG, standard copper and supplier stackup. No controlled impedance, via filling/capping, or custom dielectric construction is required. Request normal electrical testing. Keep the keyboard attached. The Gerber job identifies the four layers and nominal board thickness; its individual material-stack dimensions are deliberately omitted. Follow the supplier's standard four-layer construction and the accompanying specification.
Main components on the Export board
Export board bill of materials (BOM)
127 components, 62 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TP4054-42-SOT25R TOPPOWER(Nanjing Extension Microelectronics) | SOT-23-5 | U1 |
| 1 | SY8089AAAC Silergy Corp | SOT-23-5 | U2 |
| 1 | ESP32-C3-WROOM-02-N4 Espressif Systems | ESP32-C3-WROOM-02-N4_NoEPADSolder | U3 |
| 1 | USBLC6-2SC6 STMicroelectronics | SOT-23-6 | U4 |
| 1 | TLV803EA30DBZR Texas Instruments | SOT-23 | U5 |
| 1 | PN7160A1HN/C100E NXP Semicon | PN7160A1HN_C100E | U6 |
| 1 | AP3012KTR-E1 Diodes Incorporated | SOT-23-5 | U7 |
| 1 | PCF8574T/3,518 PCF8574T NXP Semicon | SOIC-16W_7.5x10.3mm_P1.27mm | U8 |
| 1 | MCP1700T-3002E/TT Microchip Tech | SOT-23 | U9 |
| 2 | IRLML6402TRPBF IRLML6402 Infineon Technologies | SOT-23 | Q1, Q3 |
| 3 | BSS138 onsemi | SOT-23 | Q2, Q4, Q5 |
| 1 | NX2016SA-27.12MHZ-EXS00A-CS06346 27.12MHz / CL 10pF NDK | Crystal_NDK_NX2016SA_2.0x1.6mm | Y1 |
| 1 | USB4105-GF-A-120 Global Connector Technology | USB_C_GCT_USB4105_16P_Standard | J1 |
| 1 | B2B-PH-SM4-TB(LF)(SN) JST-PH / 1S Li-ion JST | JST_PH_B2B-PH-SM4-TB_1x02-1MP_P2.00mm_Vertical | J2 |
| 1 | KEYBOARD / USER FIT | PinHeader_1x09_P2.54mm_Vertical | J3 |
| 1 | MAIN LINK / OPTIONAL | PinHeader_1x05_P2.54mm_Vertical | J4 |
| 1 | MODULE LINK / OPTIONAL | PinHeader_1x05_P2.54mm_Vertical | J5 |
| 1 | FH12A-24S-0.5SH(55) SSD1309 OLED / 24-pin HRS(Hirose) | Hirose_FH12A-24S-0.5SH_1x24-1MP_P0.50mm_Horizontal | DS1 |
| 1 | B3U-1000P RESET Omron Electronics | SW_SPST_B3U-1000P | SW1 |
| 1 | B3U-1000P BOOT Omron Electronics | SW_SPST_B3U-1000P | SW2 |
Show 42 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | B340A-13-F B340A Diodes Incorporated | D_SMA | D1, D2 |
| 1 | KT-0603R CHARGE (red) Hubei KENTO Elec | LED_0603_1608Metric | D3 |
| 1 | SS14-E3/61T SS14 Vishay Intertech | D_SMA | D4 |
| 1 | LSXND3030QKT2R2MNG 2.2uH Taiyo Yuden | L_Taiyo-Yuden_NR-30xx | L1 |
| 2 | 0805HP-151XGRC 150nH Coilcraft | L_Coilcraft_0805HP | L2, L3 |
| 1 | LPS4018-103MRC 10uH Coilcraft | L_Coilcraft_LPS4018 | L4 |
| 3 | CL32B226KAJNNNE 22uF Samsung Electro-Mechanics | C_1210_3225Metric | C1, C2, C4 |
| 2 | CL10C220JB8NNNC 22pF Samsung Electro-Mechanics | C_0603_1608Metric | C3, C41 |
| 3 | CL31A226KAHNNNE 22uF Samsung Electro-Mechanics | C_1206_3216Metric | C5, C6, C9 |
| 2 | DNP / USB tune | C_0603_1608Metric | C7, C8 |
| 12 | CL10B104KB8NNNC 100nF Samsung Electro-Mechanics | C_0603_1608Metric | C10, C11, C13, C14, C16, C18, C20, C25 +4 |
| 1 | CL10B105KA8NNNC 1uF Samsung Electro-Mechanics | C_0603_1608Metric | C12 |
| 4 | CL21B105KBFNNNE 1uF Samsung Electro-Mechanics | C_0805_2012Metric | C15, C42, C49, C52 |
| 3 | CL31B106KAHNNNE 10uF Samsung Electro-Mechanics | C_1206_3216Metric | C17, C19, C40 |
| 6 | CL21B225KAFNNNE 2.2uF Samsung Electro-Mechanics | C_0805_2012Metric | C21, C22, C23, C24, C47, C50 |
| 1 | CL10C120JB8NNNC 12pF Samsung Electro-Mechanics | C_0603_1608Metric | C26 |
| 1 | CL10C150JB8NNNC 15pF Samsung Electro-Mechanics | C_0603_1608Metric | C27 |
| 2 | GRM2165C2A102JA01D 1nF Murata Electronics | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C28, C29 |
| 2 | CC0805FRNPO0BN331 330pF YAGEO | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C30, C31 |
| 2 | CC0805FRNPO0BN680 68pF YAGEO | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C32, C33 |
| 4 | DNP / TRIM | C_0805_HandSolder_NoPaste | C34, C35, C38, C39 |
| 2 | CC0805GRNPO0BN101 100pF YAGEO | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C36, C37 |
| 1 | CL21B475KAFNNNE 4.7uF Samsung Electro-Mechanics | C_0805_2012Metric | C44 |
| 1 | CL31B475KBHNNNE 4.7uF Samsung Electro-Mechanics | C_1206_3216Metric | C46 |
| 2 | CC0805JRNPO0BN330 33pF YAGEO | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C53, C54 |
| 2 | 0603WAF5101T5E 5.1k UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R1, R2 |
| 9 | 0603WAF1002T5E 10k UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R3, R5, R8, R9, R10, R11, R21, R35 +1 |
| 3 | 0603WAF2201T5E 2.2k UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R4, R19, R20 |
| 1 | RT0603BRD07220KL 220k YAGEO | R_0603_1608Metric | R6 |
| 1 | RT0603BRD0748K7L 48.7k YAGEO | R_0603_1608Metric | R7 |
| 2 | 0603WAF220JT5E 22R UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R12, R13 |
| 1 | 0603WAF1000T5E 100R UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R14 |
| 2 | 0603WAF4703T5E 470k UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R15, R16 |
| 9 | 0603WAF1003T5E 100k UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R17, R18, R22, R23, R24, R33, R34, R36 +1 |
| 2 | 0805W8F2201T5E 2.2k UNI-ROYAL(Uniroyal Elec) | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R25, R26 |
| 2 | CRCW12062R70FKEAHP 2.7R Vishay Intertech | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R27, R28 |
| 1 | 0603WAF0000T5E 0R UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R29 |
| 1 | CPF0805B1M8E 1.8M TE Connectivity | R_0805_2012Metric | R30 |
| 1 | RT0603BRD07200KL 200k YAGEO | R_0603_1608Metric | R31 |
| 1 | 0603WAF9103T5E 910k UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R32 |
| 2 | 4.7K 4.7k | R_0603_1608Metric | R38, R39 |
| 2 | RC0805JR-070RL 0R YAGEO | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R41, R42 |
Export board design files
The KiCad project lives in the zeugmaster/nucula-board repository on GitHub; these links point at the commit this page was built from.
Export board: common questions
What microcontroller does the Export board use?
The Export board is built around the ESP32-C3-WROOM-02-N4, from the ESP32 family.
How big is the Export board?
The Export board measures 60 × 110 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Export board?
127 components, from 62 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Export board design files?
From the zeugmaster/nucula-board repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Export board design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which zeugmaster chose for the repository.
Can I test firmware for the Export 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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