4 layers180.8 × 300.3 mm
Dilemma
Bastardkb/Dilemma
The Dilemma is a vertical stagger low-profile keyboard with mods.
383 parts590
2 layers12 × 37.4 mm
RubberUSB
code2344/RubberUSBThis was my attempt at a devboard / rubber ducky USB. It is unfinished but almost done, I just can't fit the decoupling caps. (or the traces to them)
- Size
- 12 × 37.4 mm
- Copper layers
- 2
- Thickness
- 2 mm
- Parts
- 32
- Nets
- 53
- Pads
- 400
- Tracks, vias
- 319, 31
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 21 May 2026
- Updated
- 21 May 2026
Overview
RubberUSB is an open-source printed circuit board by code2344, from the code2344/RubberUSB repository on GitHub. It is a 2-layer board of 12 × 37.4 mm with 32 parts on 53 nets, routed with 319 tracks and 31 vias.
It is built around the RP2040, W25Q128JVSIQ and SK6812MINI-E. Its parts include 18 capacitors, 5 resistors, 3 ICs, 1 diode and 1 connector. It belongs with the RP2040 boards of this library.
Main components
3
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
SK6812MINI-E
SMD-40℃~+85℃ 0.6mA 1.78mm 120mcd~240mcd 120° 160mcd~320mcd 1kHz 2.8mm 2000V 3.2mm 3.7V~5.5V 460nm~470nm 515nm~525nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Semi-transparent lens SMD RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
README
README.mdThis was my attempt at a devboard / rubber ducky USB. It is unfinished but almost done, I just can't fit the decoupling caps. (or the traces to them)
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 0.1uF | Capacitor_SMD:C_0201_0603Metric | C2, C3, C4, C5, C6, C7, C8, C9, C11, C12, C17, C18 |
| 4 | 1uF | Capacitor_SMD:C_0201_0603Metric | C1, C10, C13, C14 |
| 2 | 1K | Capacitor_SMD:C_0201_0603Metric | R3, R5 |
| 2 | 27R | Capacitor_SMD:C_0201_0603Metric | R1, R2 |
| 2 | 33pF | Capacitor_SMD:C_0201_0603Metric | C15, C16 |
| 1 | 10K | Capacitor_SMD:C_0201_0603Metric | R4 |
| 1 | 12 MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | LOGO | KiCad:stasis_logo | G*** |
| 1 | MCP1700x-330xxTT | Package_TO_SOT_SMD:SOT-23 | U2 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U1 |
| 1 | SK6812MINI-E | footprints:SK6812MINI-E_fixed | D1 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | SW1 |
| 1 | USB_A_PCB_Edge_receptacle | Connector_USB_PCB_Edge:USB_A_PCB_Edge_receptacle | J1 |
| 1 | W25Q128JVS | Package_SON:Winbond_USON-8-1EP_3x2mm_P0.5mm_EP0.2x1.6mm | U3 |
| 1 | qr-small | scsqr:qr-small | QR***** |
Questions
How big is the RubberUSB PCB?
It measures 12 × 37.4 mm and has 2 copper layers, 2 mm thick.
What parts does the RubberUSB use?
32 parts, built around the RP2040, W25Q128JVSIQ and SK6812MINI-E. 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 RubberUSB KiCad files?
From the code2344/RubberUSB repository on GitHub, at the commit this page was made from: the board is RubberUSB.kicad_pcb and its schematic RubberUSB.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the RubberUSB design in my own project?
Its repository states no licence, so its author keeps all rights: ask code2344 before reusing the design.
Similar boards
- 2 layers232.3 × 84.8 mm
Qazikat
weteor/Qazikat
qaz-like keyboard with offset space, arrow cluster and ISO-enter
236 parts88CERN-OHL-P-2.0 - 2 layers291.8 × 134.6 mm
- 2 layers84.2 × 100 mm
Fabpack out v5 8
yuz207/agentpad13
agentpad13 — open-source 13-key macropad for agentic work (RP2040, vial-qmk, planar joystick, Raw HID agent-status protocol)
126 parts41 - 2 layers151.8 × 78.3 mm
Minigeki
defvs/minigeki
A portable implementation of an ONGEKI controller, with all necessary buttons, two macros, RGB LED support, USB-C.
68 parts22GPL-3.0 - 6 layers90 × 90 mm
Codex micro wired revA route nognd
slopus/codex-keybored
A 100% vibe-coded hardware build: Fusion 360, six-layer KiCad PCB, STM32 firmware, and live JLC factory handoff.
97 parts10 - 2 layers255.8 × 122.5 mm
- 2 layers368 × 104 mm
TbKB
BigTuna94/RP2.65-F
RP2.65-F Mechanical Keyboard - a 65% Ortholinear Keyboard with Faders
331 parts4MIT