2 layers95.3 × 95.3 mm
Panel25
sago35/keyboards
This repository was created to manage the circuitry and firmware for the keyboards I designed. The firmware is created using sago35/tinygo-keyboard.
77 parts22MIT
2 layers245.3 × 78.6 mm
Sg48key2
sago35/keyboards22This repository was created to manage the circuitry and firmware for the keyboards I designed. The firmware is created using sago35/tinygo-keyboard.
- Size
- 245.3 × 78.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 158
- Nets
- 118
- Pads
- 727
- Tracks, vias
- 2,449, 135
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 12 Mar 2024
- Updated
- 4 Oct 2026
Overview
Sg48key2 is an open-source printed circuit board by sago35, from the sago35/keyboards repository on GitHub, published under the MIT licence. It is a 2-layer board of 245.3 × 78.6 mm with 158 parts on 118 nets, routed with 2,449 tracks and 135 vias.
It is built around the RKJXV122400R, RP2040-ZERO and 1N4148W. Its parts include 103 diodes, 46 switches and 3 ICs. It belongs with the RP2040 boards of this library.
Main components
3
RKJXV122400R
插件10kΩ 125mW 5V ±5% 插件 Potentiometers, Variable Resistors ROHSALPSALPINEPotentiometers & Variable Resistors
RP2040-ZERO
-- Development Boards & Kits ROHSWaveshareDevelopment Boards & Kits
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
README
README.mdkeyboards
This repository was created to manage the circuitry and firmware for the keyboards I designed.
The firmware is created using sago35/tinygo-keyboard.
sg24
zero-kb02/
- kicanvas
- gerber data for jlcpcb
- For the
Mark on PCBitem, please selectOrder Number(Specify Position)
- For the
- case (stl / 3mf)
- workshop - https://github.com/sago35/tinygo_keeb_workshop_2024
pinout
| Name | Pin | Info |
|---|---|---|
| VR_BTN | machine.GPIO0 | InputPullup |
| WS2812 | machine.GPIO1 | Output |
| ROT_BTN1 | machine.GPIO2 | InputPullup |
| ROT_A1 | machine.GPIO3 | InputPullup |
| ROT_B1 | machine.GPIO4 | InputPullup |
| COL1 | machine.GPIO5 | Output |
| COL2 | machine.GPIO6 | Output |
| COL3 | machine.GPIO7 | Output |
| COL4 | machine.GPIO8 | Output |
| ROW1 | machine.GPIO9 | InputPulldown |
| ROW2 | machine.GPIO10 | InputPulldown |
| ROW3 | machine.GPIO11 | InputPulldown |
| SDA0_TX0 | machine.GPIO12 | I2C SDA |
| SCL0_RX0 | machine.GPIO13 | I2C SCL |
| EX01 | machine.GPIO14 | GPIO |
| EX02 | machine.GPIO15 | GPIO |
| EX03 | machine.GPIO26 | GPIO / ADC |
| EX04 | machine.GPIO27 | GPIO / ADC |
| VR_Y | machine.GPIO28 | ADC |
| VR_X | machine.GPIO29 | ADC |
matrix and leds
The image below represents the relationship between the COL and ROW of the MATRIX wiring, as well as the order of the LEDs.
It was created by rdon_key.
sg48key2
- kicanvas
- Configuration of U3 is incorrect and needs to be fixed.
conf2025badge
This is the badge for TinyGo Conference 2025 in JAPAN.
| No | 品名 | 個数 | 備考 |
|---|---|---|---|
| 1 | 基板 | 1 | |
| 2 | XIAO RP2040 | 1 | |
| 3 | ジョイスティック | 1 | |
| 4 | OLED 液晶 | 1 | SSD1306 128x64 |
| 5 | プルアップ抵抗 | 2 | 3.3K (1K – 10K) |
| 6 | キースイッチ | 2 | |
| 7 | キーキャップ | 2 | |
| 8 | キーソケット | 2 | MX socket |
| 9 | ロータリーエンコーダー | 1 | EC11 互換、20mm Plum |
| 10 | RGB LED | 2 | SK6812MINI-E |
| 11 | ブザー | 1 | |
| 12 | エンコーダーノブ | 1 | |
| 13 | ハット | 1 | ジョイスティック用 |
| 14 | スイッチプレート | 1 | |
| 15 | ボトムプレート | 1 | |
| 16 | 木ねじ 2.1×10 | 2 |
gocon2026badge
This is the badge for Go Conference 2026.
| No | 品名 | 個数 | 備考 |
|---|---|---|---|
| 1 | 基板 | 1 | |
| 2 | RP2040-Zero | 1 | Waveshare |
| 3 | TFT 液晶 | 1 | ST7789 1.54 インチ 240x240 SPI |
| 4 | RGB LED | 16 | SK6812MINI-E、5 個入りなので注意 |
| 5 | タクトスイッチ | 5 | 6mm 角、高さ 5mm |
| 6 | Grove コネクタ | 2 | I2C / UART |
pinout
| Name | Pin | Info |
|---|---|---|
| BTN_A | machine.GPIO3 | InputPullup |
| BTN_B | machine.GPIO6 | InputPullup (未搭載) |
| BTN_R | machine.GPIO7 | InputPullup |
| BTN_U | machine.GPIO8 | InputPullup |
| WS2812 | machine.GPIO9 | Output (16 LEDs) |
| LCD SCK | machine.GPIO10 | SPI1 SCK |
| LCD SDO | machine.GPIO11 | SPI1 SDO |
| LCD BL | machine.GPIO12 | Output |
| LCD CS | machine.GPIO13 | Output |
| LCD DC | machine.GPIO14 | Output |
| LCD RST | machine.GPIO15 | Output |
| BTN_L | machine.GPIO28 | InputPullup |
| BTN_D | machine.GPIO29 | InputPullup |
firmware
tinygo flash --target waveshare-rp2040-zero --size short --stack-size 8kb ./gocon2026badge/firmware/| Button on badge screen | Screen |
|---|---|
| A | Timetable |
| U | Breakout |
| R | Cyclone game |
| D | 3D demo |
| L | Name tag (D shows the QR code) |
Press A on each screen to go back to the badge screen.
Parts
158| Qty | Value | Footprint | References |
|---|---|---|---|
| 55 | 1N4148W | foostan/kbd:D3_SMD_v2 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +39 |
| 48 | YS-SK6812MINI-E | foostan/kbd:YS-SK6812MINI-E | LED1, LED2, LED10, LED11, LED12, LED13, LED14, LED15, LED16, LED17, LED18, LED19, LED20, LED21, LED22, LED23 +32 |
| 46 | SW_PUSH | sglib:ChocV1_V2_Hotswap | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +30 |
| 6 | MountingHole | sglib:Hole-2.5mm | H1, H2, H3, H4, H5, H6 |
| 2 | RKJXV122400R | sglib:FJ08K-S_ChocV1_V2_Hotswap | U2, U3 |
| 1 | rp2040-zero | sglib:rp2040-zero_wide_with_choc_socket | U1 |
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Questions
How big is the Sg48key2 PCB?
It measures 245.3 × 78.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sg48key2 use?
158 parts, built around the RKJXV122400R, RP2040-ZERO and 1N4148W. 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 Sg48key2 KiCad files?
From the sago35/keyboards repository on GitHub, at the commit this page was made from: the board is sg48key2/sg48key2/sg48key2.kicad_pcb and its schematic conf2025badge/conf2025badge/conf2025badge.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sg48key2 design in my own project?
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).