2 layers233.7 × 91.5 mm
Skywatch
ozkan/skywatch
35% ergonomic ortholinear keyboard, powered by RP2040, along with OLED and hotswap sockets support
133 parts41MIT
2 layers125.5 × 95.1 mm
Kuromaru
0xcharly/kuromaruA fork of the Dilemma in a smaller footprint
- Size
- 125.5 × 95.1 mm
- Copper layers
- 2
- Thickness
- 1.2 mm
- Parts
- 55
- Nets
- 60
- Pads
- 254
- Tracks, vias
- 589, 48
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 3 Sep 2022
- Updated
- 11 Sep 2022
Overview
Kuromaru is an open-source printed circuit board by 0xcharly, from the 0xcharly/kuromaru repository on GitHub. It is a 2-layer board of 125.5 × 95.1 mm with 55 parts on 60 nets, routed with 589 tracks and 48 vias.
It is built around the RP2040, GD25Q80CEIGR and XC6210B332MR-G. Its parts include 31 capacitors, 12 resistors, 3 ICs, 2 diodes and 2 connectors. 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)GD25Q80CEIGR
USON-8-EP(2x3)-40℃~+85℃ 100,000 cycles 120MHz 1uA 2.7V~3.6V 20 Years 600us 8Mbit SPI USON-8-EP(2x3) NOR FLASH ROHSGigaDevice Semicon BeijingNOR FLASH
XC6210B332MR-G
SOT-25-5-40℃~+85℃@(Ta) 1 100mV@(200mA) 3.3V 55uA 60dB@(1kHz) 6V 700mA Fixed Over Current Protection、Over Temperature Protection、Enable Positive SOT-25-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
Parts
55| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | SW_Push_SK6812 | local-libraries:delay_SW_MX_flipped | C1R1, C1R2, C1R3, C2R1, C2R2, C2R3, C2R4, C3R1, C3R2, C3R3, C4R1, C4R2, C4R3, C5R1, C5R2, C5R3 |
| 8 | 100n | Capacitor_SMD:C_0402_1005Metric | C7, C8, C9, C10, C11, C12, C13, C14 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric | R2, R9, R11 |
| 3 | 1k | Resistor_SMD:R_0402_1005Metric | R1, R3, R8 |
| 3 | 5.1k | Resistor_SMD:R_0402_1005Metric | R4, R5, R10 |
| 2 | 15p | Capacitor_SMD:C_0402_1005Metric | C3, C4 |
| 2 | 1µ | Capacitor_SMD:C_0402_1005Metric | C5, C6 |
| 2 | 1µ | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 27 | Resistor_SMD:R_0402_1005Metric | R6, R7 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_CK_KXT3 | SW1, SW2 |
| 1 | 5.1k | local-libraries:R_0402_1005Metric_nolabel | R14 |
| 1 | B5817 | Diode_SMD:D_SOD-323 | D2 |
| 1 | Crystal_GND24 | Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm | Y1 |
| 1 | FerriteBead_Small | Inductor_SMD:L_0603_1608Metric | FB1 |
| 1 | GD25Q80CEIGR | 0xLib_Package_DFN_QFN:USON-8-1EP_3x2mm_P0.5mm_EP0.25x1.65mm | U2 |
| 1 | LED | LED_SMD:LED_0402_1005Metric | D1 |
| 1 | Polyfuse | Fuse:Fuse_0603_1608Metric | F1 |
| 1 | RP2040 | 0xLib_Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U1 |
| 1 | Serial | local-libraries:delay_TRRS_PJ_320A | J102 |
| 1 | USB_C_Receptacle_USB2.0 | 0xLib_USB_Type-C:USB_C_Receptacle_HRO_TYPE-C-31-M-13B | J1 |
| 1 | XC6210B332MR-G | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | locked | local-libraries:delay_SW_MX_flipped | C1R4 |
Similar boards
- 2 layers134 × 95.1 mm
- 2 layers17.8 × 33 mm
- 4 layers180.8 × 300.3 mm
Dilemma
Bastardkb/Dilemma
The Dilemma is a vertical stagger low-profile keyboard with mods.
383 parts590 - 4 layers137 × 141 mm
- 2 layers41.6 × 77.6 mm
- 2 layers
- 4 layers194.2 × 160 mm
Questions
How big is the Kuromaru PCB?
It measures 125.5 × 95.1 mm and has 2 copper layers, 1.2 mm thick.
What parts does the Kuromaru use?
55 parts, built around the RP2040, GD25Q80CEIGR and XC6210B332MR-G. 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 Kuromaru KiCad files?
From the 0xcharly/kuromaru repository on GitHub, at the commit this page was made from: the board is kuromaru.kicad_pcb and its schematic kuromaru.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Kuromaru design in my own project?
Its repository states no licence, so its author keeps all rights: ask 0xcharly before reusing the design.