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Pro Micro compatible Microcontroller featuring USB C and exposing every usable pin

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0xCB-dev/0xCB-Pluto

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0xCB-Pluto

Electrically and physically compatible with the standard Pro Micro featuring USB C, a flatter design for thight builds and preflashed with the QMK DFU bootloader for added stability. Also exposing all available pins!

Licence OSHWA

Available here:

KeebSupply

Flashing

  • qmk clone
  • cd qmk_firmware
  • export LTO=Y
  • To go to bootloader press the reset button.
  • make 0xcb/pluto:via:flash

Assembly:

You can use the humanpnp to easily place components.

PCB:

KiCad 6 stable

Schematic

Top Bottom

BOM:

References Value Quantity Part Nb.
C3, C4, C7, C8 100n 4 C478888
C2, C9, C10 1u 3 C29936
C5, C6 22p 2 C85969
C1 10u 1 C85713
R1, R2 5.1k 2 C23186
R4, R5 22 2 C174301
R3, R6 10k 2 C98220
D1 SMF5.0CA 1 576-SMF5.0CA
U1 USBLC6-2SC6 1 C7519
U2 ATMEGA32U4 1 ATMEGA32U4RC-MU-ND
Y1 16MHz 1 C389842
F1 1A 1 C369150
SW1 SW_Push 1 C589221
FB1, FB2 600R 2 C74330
J1 USB_IN 1 900-2169900001CT-ND

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Pro Micro compatible Microcontroller featuring USB C and exposing every usable pin

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