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google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards

BOM: - 6x Cherry MX Switches - 1x SK6812 MINI LED - 1x XIAO RP2040 - 6x Blank DSA Keycaps - 1x 3.3V I2C 0.91 Inch OLED Display
Macropad is an open-source printed circuit board by georgempla, from the georgempla/macropad repository on GitHub, published under the MIT licence. It is a 2-layer board of 61.9 × 64.3 mm with 9 parts on 15 nets, routed with 66 tracks and 3 vias.
It is built around the SK6812MINI-E. Its parts include 6 switches, 1 IC, 1 diode and 1 connector. It belongs with the keyboards and input boards and the RP2040 boards of this library.
After many hours of work I finally put everything together in what I hope is a functional hackpad. (A better picture will be added once everything is assembled)

I recently learned about the blueprint program and decided it was the perfect way to gain some experience actually building stuff.
This was the first PCB I have ever designed (which is probably obvious from the wiring). Getting the software to work and learning the fundamental aspects of PCB design was challenging but thankfully my previous knowledge helped me overcome any problems.
After reading a lot of documentation this is what I came up with. Now obviously I can't test the code since I don't have anything similar so as soon as everything is assembled I will test, bug fix and upload the new code with any corrections that were made.
BOM:
Others:
| Schematic | PCB | Case |
|---|---|---|
![]() | ![]() | ![]() |
| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5, SW6 |
| 1 | I2C_Connector | Oled:SSD1306-0.91-OLED-4pin-128x32 | J1 |
| 1 | SK6812MINI | LED_SMD:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D2 |
| 1 | XIAO-RP2040-DIP | OPL Lib:XIAO-RP2040-DIP | U1 |
It measures 61.9 × 64.3 mm and has 2 copper layers, 1.6 mm thick.
9 parts, built around the SK6812MINI-E. 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.
From the georgempla/macropad repository on GitHub, at the commit this page was made from: the board is PCB/macropad.kicad_pcb and its schematic PCB/macropad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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