2 layers88.9 × 50.8 mm
DogeKey2
acamilo/pcb-artwork-project
Collection of graphical PCBs containing memes, logos of youtube channels i watch, among other things.
23 parts1
2 layers19 × 19 mm
Snowflake
acornitum/snowflake9one key macropad w/ ch552e!!
- Size
- 19 × 19 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 21
- Nets
- 15
- Pads
- 62
- Tracks, vias
- 144, 34
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 23 Aug 2026
- Updated
- 27 Sep 2026
Overview
Snowflake is an open-source printed circuit board by acornitum, from the acornitum/snowflake repository on GitHub. It is a 2-layer board of 19 × 19 mm with 21 parts on 15 nets, routed with 144 tracks and 34 vias.
It is built around the CH552E and WS2812B-2020. Its parts include 4 resistors, 2 capacitors, 2 switches, 1 IC and 1 diode. It belongs with the keyboards and input boards and the 8051 (CH55x, STC, AT89) boards of this library.
Main components
2
CH552E
MSOP-1016KB 24MHz 3.3V~5V 51 Family 8bit FLASH MSOP-10 Microcontrollers (MCU/MPU/SOC) ROHSWCH (Nanjing Qinheng Microelectronics)Microcontrollers (MCU/MPU/SOC)
WS2812B-2020
SMD,2.2x2mm0.6mA 0.84mm 120us 160mcd 200mcd 2kHz 2mm 2mm 300ns 470.4nm 515.6nm 520mcd 5V 622.5nm 800Kbit/s Built-in power-on reset circuit、Built-in power-on reset circuit、Integrated intelligent reverse connection protection function Top-mount SMD,2.2x2mm RGB LEDs(Built-in IC) ROHSWorldsemiRGB LEDs(Built-In IC)
README
README.mdSnowflake - one key macropad
Snowflake is a one key macropad! Solder on any mx-style switch and use it as a one key keyboard - the PCB itself measures 19x19mm :D
Featuring:
- CH552E as the microcontroller
- Neopixel on the bottom
- All unused pins broken out
- USB-C for power and data
- Keychain hole (M2 screw size); hang it on your bag!
This project was made in ~5h in one go, art included.
I've ordered 160 of these - at that quantity, when panelized, they cost <1.5 USD each, parts and assembly included. I'll be giving them out - if you see me IRL, feel free to ask for one!
Screenshot of schematic + PCB in KiCad:
This repo will be updated with a 3d printable case later :D
For uploading your own firmware, go to the readme in the firmware folder of this repo!
Parts
21| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP1, TP2, TP3, TP4, TP6, TP7 |
| 3 | LOGO | LOGO | G***, G***, G*** |
| 2 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 330 | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | CH552E | Package_SO:MSOP-10_3x3mm_P0.5mm | U1 |
| 1 | DFU | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | SW2 |
| 1 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad | H1 |
| 1 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1 |
| 1 | USB_C_Receptacle_USB2.0_14P | PCM_marbastlib-various:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | WS2812B-2020 | LED_SMD:LED_WS2812B-2020_PLCC4_2.0x2.0mm | D1 |
Questions
How big is the Snowflake PCB?
It measures 19 × 19 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Snowflake use?
21 parts, built around the CH552E and WS2812B-2020. 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 Snowflake KiCad files?
From the acornitum/snowflake repository on GitHub, at the commit this page was made from: the board is pcb/snowflake.kicad_pcb and its schematic pcb/snowflake.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Snowflake design in my own project?
Its repository states no licence, so its author keeps all rights: ask acornitum before reusing the design.
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