2 layers62 × 62 mm
4 layers25 × 29.6 mm
Micro
0xCB-dev/0xCB-micro51% - 65% keyboard controller with RGB underglow and a backlight driver
- Size
- 25 × 29.6 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 45
- Nets
- 50
- Pads
- 208
- Tracks, vias
- 456, 65
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 27 Jun 2021
- Updated
- 18 Jan 2022
Overview
Micro is an open-source printed circuit board by 0xCB-dev, from the 0xCB-dev/0xCB-micro repository on GitHub. It is a 4-layer board of 25 × 29.6 mm with 45 parts on 50 nets, routed with 456 tracks and 65 vias.
It is built around the ATMEGA32U4, USBLC6-2SC6 and 1N4148WT, with the FDS9926A and WS2812B among its other parts. Its parts include 10 capacitors, 9 resistors, 7 connectors, 2 ICs and 2 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
5
ATMEGA32U4
UncategorisedUnknown maker
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
1N4148WT
SOD-523-55℃~+150℃ 1.25V@150mA 100V 150mA 150mW 1uA@75V 2A 4ns Independent SOD-523 Switching Diodes ROHShongjiachengSwitching Diodes
FDS9926A
SOP-81.5W 112pF 142pF 17nC@4.5V 2 N-Channel 20V 22mΩ@4.5V、30mΩ@2.5V 6A 700mV 850pF N-Channel SOP-8 MOSFETs ROHSJSMSEMIMOSFETs
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
README
README.md0xcb-micro
1% - 65% keyboard controller with RGB underglow and a backlight driver
| Licence | OSHWA |
|---|---|
 |  |
Flashing
qmk clonecd qmk_firmwareexport LTO=Y- To go to bootloader hold the ESC key (row0 col0 / the key on the PCB) while plugging in (or short RST from the ISP header to GND).
make 0xcb/micro:via:flash
Assembly:
You can use the humanpnp to easily place components.
PCB:
KiCad 6 stable
| Top | Bottom |
|---|---|
 |  |
BOM:
| References | Value | Quantity | Part Nb. |
|---|---|---|---|
| C2, C3, C4, C5, C10 | 100n | 5 | C478888 |
| C6, C9 | 1u | 2 | C29936 |
| C7, C8 | 22p | 2 | C85969 |
| C1 | 10u | 1 | C85713 |
| R5, R6, R8 | 10k | 3 | C98220 |
| R1, R2 | 5.1k | 2 | C23186 |
| R3, R4 | 22 | 2 | C174301 |
| R7, R9 | 330 | 2 | C104763 |
| D1 | 1N4148WT | 1 | C511874 |
| D2 | WS2812B | 1 | C114586 |
| U2 | ATMEGA32U4 | 1 | ATMEGA32U4RC-MU-ND |
| U1 | USBLC6-2SC6 | 1 | C7519 |
| Y1 | 16MHz | 1 | C389842 |
| F1 | 1A | 1 | C369150 |
| FB1 | 600R | 1 | C74330 |
| Q1 | FDS9926A | 1 | C693202 |
| J1 | USB | 1 | C168688 |
Parts
45| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 100n | Capacitor_SMD:C_0603_1608Metric | C2, C3, C4, C5, C10 |
| 5 | G*** | svg2mod | 0xCB, micro, svg2mod, svg2mod, svg2mod |
| 3 | 10k | Resistor_SMD:R_0603_1608Metric | R5, R6, R8 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric | C6, C9 |
| 2 | 22 | Resistor_SMD:R_0603_1608Metric | R3, R4 |
| 2 | 22p | Capacitor_SMD:C_0603_1608Metric | C7, C8 |
| 2 | 330 | Resistor_SMD:R_1206_3216Metric | R7, R9 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | MountingHole_Pad | 0xcb:MountingHole_2.2mm_M2_DIN965_Pad_TopBottom_SMOL | H1, H2 |
| 1 | 10u | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 16MHz | 0xcb:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 1A | 0xcb:Fuse_0805_2012Metric | F1 |
| 1 | 1N4148WT | Diode_SMD:D_SOD-523 | D1 |
| 1 | 600R | 0xcb:Ferrite_Bead_0603 | FB1 |
| 1 | ATMEGA32U4 | 0xcb:QFN-44-1EP_7x7mm_P0.5mm_EP5.2x5.2mm_ThermalVias | U2 |
| 1 | Conn_01x02 | Connector_PinHeader_1.27mm:PinHeader_1x02_P1.27mm_Vertical | J3 |
| 1 | Conn_01x03 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | J4 |
| 1 | Conn_01x04 | Connector_PinHeader_1.27mm:PinHeader_1x04_P1.27mm_Vertical | J5 |
| 1 | Conn_01x05 | Connector_PinHeader_1.27mm:PinHeader_1x05_P1.27mm_Vertical | J6 |
| 1 | Conn_01x16 | Connector_PinHeader_1.27mm:PinHeader_1x16_P1.27mm_Vertical | J7 |
| 1 | FDS9926A | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | Q1 |
| 1 | ISP | 0xcb:AVR_PROG_2.54_THT | J2 |
| 1 | LOGO | 0xcb:oshwa | G*** |
| 1 | LOGO | 0xcb:logo | G*** |
| 1 | MX-LED | 0xcb:MXOnly-1U | MX1 |
| 1 | USB | 0xcb:HRO-TYPE-C-31-M-13 | J1 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D2 |
The 44 most common of 45 parts.
Questions
How big is the Micro PCB?
It measures 25 × 29.6 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Micro use?
45 parts, built around the ATMEGA32U4, USBLC6-2SC6, 1N4148WT and FDS9926A. 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 Micro KiCad files?
From the 0xCB-dev/0xCB-micro repository on GitHub, at the commit this page was made from: the board is rev1.0/micro.kicad_pcb and its schematic rev1.0/micro.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Micro design in my own project?
Its repository states no licence, so its author keeps all rights: ask 0xCB-dev before reusing the design.
Similar boards
- 4 layers80 × 80 mm
2026 C AV LPSU
EPFLRocketTeam/2026_C_AV_HARDWARE
Repository containing PCBs files of FH2 Avionics
132 parts - 2 layers89 × 100 mm
Hub16
joshajohnson/Hub16
A macro pad with 16 keys, two rotary encoders, a four port USB hub, and plenty of LEDs!
132 parts388 - 2 layers61.9 × 65.9 mm
- 2 layers285 × 94.6 mm
- 2 layers144 × 144 mm
- 6 layers
- 2 layers120.6 × 73.7 mm
