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40% Mechanical TH Keyboard that using m3 screw instead of m2 screw that got less stock.

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alipank/0xCB-Static-M3

 
 

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0xcb-static

40% with OLED and Encoder running QMK

Licence OSHWA

Flashing

  • qmk clone
  • cd qmk_firmware
  • export LTO=Y
  • To go to bootloader hold the ESC key while plugging in (or RESET switch, then hold the BOOT switch, release RESET, release BOOT). The board should now appear in lsusb (or device manager).
  • make 0xcb/static:via:flash

Assembly:

You can use the humanpnp to easily place components.

PCB:

KiCad 6 stable

Schematic

Top Bottom

3D files:

STLs

BOM:

References Value Quantity Part Nb.
C3, C4 20pF 2 C415398
C1, C2 0.1uF 2 C409821
R1, R2 5.1K 2 C58676
R3, R4 75 2 C713897
R5 10k 1 C58673
R6 1.5k 1 C433494
D1, ..., D48 1N4148 48 C14516
D49, D50 1N4729 2 C2532
U1 ATmega328-P 1 ATMEGA328P-PU-ND
Y1 16MHz 1 C16212
F1 500mA 1 C268799
SW1, SW2 RESET, BOOT 1 450-1650-ND
MX1, ..., MX44 MX-NoLED 43 Cherry MX switches
OL1 OLED 1 SSD1306 128x32
MX12 EC11 1 PEC11R-4220F-S0024-ND
J1 USB4085 Type C 1 640-USB4085-GF-A

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40% Mechanical TH Keyboard that using m3 screw instead of m2 screw that got less stock.

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