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

macropad with 6 keys, 1 rotary encoder, 1 0.91" oled, 2 micro eleds
Original macropad is an open-source printed circuit board by eastmohan, from the eastmohan/macropad repository on GitHub. It is a 2-layer board of 63.3 × 78.8 mm with 11 parts on 16 nets, routed with 180 tracks and 13 vias.
It is built around the SK6812MINI-E. Its parts include 7 switches, 2 ICs and 2 diodes. It belongs with the keyboards and input and lEDs and displays boards and the RP2040 boards of this library.
macropad with 6 keys, 1 rotary encoder, 1 0.91" oled, 2 micro eleds
rotary encoder: set to control volume
keys: mapped to skip/pause songs, turn LEDs and OLED on/off, copy, and paste.
oled displays current song + artist
micro eleds and the XIAO onboard LED all cycle a rainbow (synced)
to use the oled for now playing, first install rainmeter and then add the skin in this repo. you may need a chrome extension to get now playing info from chrome. it should refresh every few seconds and save the song and artist to a txt file in the rainmeter folder, which the python script reads and prints to the oled.
for personal use
not for commercial use
Demo: https://www.youtube.com/watch?v=B0LNcNpDYtY
Updates since recording:
Upper left button:
BOM:
SK6812MINI-E mini LED - 2
Resistor_SMD:R_0402_1005Metric
Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB - 6
Keycaps - 6
Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm - 1
RF_Module:MCU_Seeed_ESP32C3 - 1
4pinoled:SSD1306-0.91-OLED-4pin-128x32 - 1
M3 x 16mm screws - 4
M3 heat set inserts - 4
| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5, SW6 |
| 2 | SK6812MINI | eled:SK6812MINI-E_fixed | D4, D5 |
| 1 | RotaryEncoder | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW7 |
| 1 | SSD1306 | 4pinoled:SSD1306-0.91-OLED-4pin-128x32 | U2 |
| 1 | XIAO-RP2040-DIP | XIAO_Series_Footprints_real:XIAO-RP2040-DIP | U1 |
It measures 63.3 × 78.8 mm and has 2 copper layers, 1.6 mm thick.
11 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 eastmohan/macropad repository on GitHub, at the commit this page was made from: the board is PCB/original_macropad.kicad_pcb and its schematic PCB/original_macropad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask eastmohan before reusing the design.

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