Chessler
About the Chessler PCB
Chessler is an open source ESP32 PCB design by vuktacic, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 41 mm, with 37 components from 23 distinct parts.
Its main chip is the ESP32-WROOM-32D-N4, from the ESP32 family. Other key parts include the MP2393GTL-Z, CH340C and GT-USB-7047B. By type, the board carries 15 resistors, 13 capacitors, 4 ICs, 3 transistors, 1 diode and 1 inductor.
From the project
View the PCB on KiCanvas: [](https://kicanvas.org/?github=https://github.com/vuktacic/chessler/tree/main/pcb)
Main components on the Chessler
Chessler bill of materials (BOM)
37 components, 23 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-WROOM-32D-N4 ESP32-WROOM-32D ESPRESSIF(乐鑫) | WIFIM-SMD_39P-L25.5-W18.0-P1.27-BL | U3 |
| 1 | MP2393GTL-Z MPS(芯源) | SOT-583-8_L2.1-W1.2-P0.50-LS1.6-BL | U4 |
| 1 | CH340C CH340C_C7464026 WCH(南京沁恒) | SOP-16_L10.0-W3.9-P1.27-LS6.0-BL | U5 |
| 1 | GT-USB-7047B G-Switch(品赞) | MICRO-USB-SMD_GT-USB-7047B | U6 |
| 2 | MMBT3904(RANGE:100-300) Q_NPN CJ(江苏长电/长晶) | SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR | Q1, Q2 |
| 1 | AO3400A NMOS AOS | SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR | Q3 |
| 1 | SS14 MDD(辰达半导体) | SMA_L4.2-W2.6-LS5.0-RD_1 | D4 |
| 1 | CMI201209U2R2KT 2.2uH FH(风华) | L0805 | L2 |
| 6 | CC0603KRX7R9BB104 0.1uF YAGEO(国巨) | C0603 | C1, C3, C4, C5, C9, C14 |
| 1 | CL10A106MA8NRNC 10uF SAMSUNG(三星) | C0603 | C2 |
| 3 | CL21A226MAQNNNE 22uF SAMSUNG(三星) | C0805 | C8, C10, C16 |
| 1 | 0603B682K500NT 6.8nF FH(风华) | C0603 | C11 |
| 1 | CL10A105KB8NNNC 1uF SAMSUNG(三星) | C0603 | C12 |
| 1 | CL10C100JB8NNNC 10pF SAMSUNG(三星) | C0603 | C13 |
| 5 | 0805W8F1002T5E 10kΩ UNI-ROYAL(厚声) | R0805 | R1, R2, R4, R5, R6 |
| 1 | 0603WAF1000T5E 100Ω UNI-ROYAL(厚声) | R0603 | R3 |
| 1 | 0603WAF4022T5E 40.2kΩ UNI-ROYAL(厚声) | R0603 | R7 |
| 1 | 0603WAF1302T5E 13kΩ UNI-ROYAL(厚声) | R0603 | R8 |
| 1 | 0603WAF5603T5E 560kΩ UNI-ROYAL(厚声) | R0603 | R9 |
| 1 | 0603WAF2202T5E 22kΩ UNI-ROYAL(厚声) | R0603 | R10 |
Show 3 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 0603WAF200JT5E 20Ω UNI-ROYAL(厚声) | R0603 | R11 |
| 2 | 0603WAF1001T5E 1kΩ UNI-ROYAL(厚声) | R0603 | R12, R15 |
| 2 | 0603WAF5101T5E 5.1kΩ UNI-ROYAL(厚声) | R0603 | R13, R14 |
Chessler design files
The KiCad project lives in the vuktacic/chessler repository on GitHub; these links point at the commit this page was built from.
- Layoutpcb/chessbot.kicad_pcb
- Schematicpcb/chessbot.kicad_sch
- BOMbom.csv
Chessler: common questions
What microcontroller does the Chessler use?
The Chessler is built around the ESP32-WROOM-32D-N4, from the ESP32 family.
How big is the Chessler PCB?
The Chessler measures 100 × 41 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Chessler?
37 components, from 23 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 Chessler design files?
From the vuktacic/chessler repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Chessler design in my own project?
Yes, under the terms of its MIT license, which vuktacic chose for the repository.
Can I test firmware for the Chessler 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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