2 layers42 × 67 mm
2 layers21 × 51 mm
Custom Dev Board
CosmicengineerC/Custom-Dev-Board1A custom dev board designed by me to allow me to create intricate projects
- Size
- 21 × 51 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 35
- Nets
- 53
- Pads
- 192
- Tracks, vias
- 568, 37
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 27 Apr 2026
- Updated
- 15 May 2026
Overview
Custom Dev Board is an open-source printed circuit board by CosmicengineerC, from the CosmicengineerC/Custom-Dev-Board repository on GitHub. It is a 2-layer board of 21 × 51 mm with 35 parts on 53 nets, routed with 568 tracks and 37 vias.
It is built around the RP2040 and W25Q128JVSIQ. Its parts include 17 capacitors, 7 resistors, 4 connectors, 3 ICs and 1 switch. It belongs with the microcontroller boards boards and the RP2040 boards of this library.
Main components
2
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
README
README.mdCustom-Dev-Board
A custom dev board designed by me to allow me to create intricate projects
A minimal, high-performance prototyping board based on the Raspberry Pi RP2040.
Core Specs MCU: Dual ARM Cortex-M0+ (133 MHz, 264 KB SRAM).
Storage: 2 MB QSPI Flash.
I/O: 20-pin breakout (GPIO, ADC, UART, SPI, I2C).
Clock: 12 MHz Crystal.
Power: USB-C (5V) to 3.3V LDO.
How to Use:
Honestly idk, however you want, its a cheaper version of an esp-32, meant for small projects, its meant to be disposable in the sense of messing it up before a 100 dollar chip.
Why I made this:
I made this because i wanted to test my skills, and allow me to easily create more intricate projects with ease. It is also a good starter project to learn the intricacies of PCB design.
Parts
35| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C2, C3, C4, C5, C6, C7, C8, C9, C11, C12, C17 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric | C13, C14 |
| 2 | 1uF | Capacitor_SMD:C_0402_1005Metric | C1, C10 |
| 2 | 27 | Resistor_SMD:R_0402_1005Metric | R3, R4 |
| 2 | 33pF | Capacitor_SMD:C_0402_1005Metric | C15, C16 |
| 2 | 5.1K | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | Conn_01x20_Pin | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | J2, J3 |
| 1 | 10K | Resistor_SMD:R_0402_1005Metric | R7 |
| 1 | 12MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 1K | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | 1k | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J4 |
| 1 | LOGO | Library:Death Star | G*** |
| 1 | LOGO | Library:Mand | G*** |
| 1 | NCP1117-3.3_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U1 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | SW1 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | W25Q128JVS | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U3 |
Questions
How big is the Custom Dev Board PCB?
It measures 21 × 51 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Custom Dev Board use?
35 parts, built around the RP2040 and W25Q128JVSIQ. 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 Custom Dev Board KiCad files?
From the CosmicengineerC/Custom-Dev-Board repository on GitHub, at the commit this page was made from: the board is Custom Dev Board.kicad_pcb and its schematic Custom Dev Board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Custom Dev Board design in my own project?
Its repository states no licence, so its author keeps all rights: ask CosmicengineerC before reusing the design.
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