Key board
About the Key board
Key board is an open source STM32 PCB design by TheBadZhang, published on GitHub. It is a 2-layer board measuring 72 × 66 mm, with 12 components from 5 distinct parts.
Its main chip is the STM32G431CBUx, from the STM32 family. Other key parts include the STM32G031G8Ux. By type, the board carries 8 switches, 3 ICs and 1 connector.
It belongs with the retro computing designs in this gallery.
From the project
NES 掌上游戏机，也不只是游戏机
archive - 归档文件，一些废弃的工作 nesshell - 主板（包含主要计算功能）（不包含音频输入输出（可能考虑包含），不包含HDMI、VGA等显示输出） keyboard - 按键子板（包含按键、LED、蜂鸣器等） mediaboard - 多媒体子板（包含音频输入输出、HDMI、VGA等显示输出） pmodextender - PMOD扩展板（包含PMOD接口） screenmodulest7789 - st7789 屏幕模块（包含IPS LCD、WiFi、蓝牙、SD卡等）
Main components on the Key board
Key board bill of materials (BOM)
12 components, 5 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32G431CBUx | QFN-48-1EP_7x7mm_P0.5mm_EP5.6x5.6mm | U1 |
| 1 | STM32G031G8Ux | QFN-28_4x4mm_P0.5mm | U2 |
| 1 | ~ | ns_joystick | U4 |
| 1 | Conn_01x20_MountingPin | TE_2-1734839-0_1x20-1MP_P0.5mm_Horizontal | J1 |
| 8 | SW_Push | KEY-SMD_4P-L4.2-W3.4-P2.15-LS4.5-TL | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 |
Key board design files
The KiCad project lives in the TheBadZhang/nes_shell repository on GitHub; these links point at the commit this page was built from.
Key board: common questions
What microcontroller does the Key board use?
The Key board is built around the STM32G431CBUx, from the STM32 family.
How big is the Key board?
The Key board measures 72 × 66 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Key board?
12 components, from 5 distinct parts. The full bill of materials is listed on this page.
Where can I download the Key board design files?
From the TheBadZhang/nes_shell repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Key board design in my own project?
The repository has no license, so all rights stay with TheBadZhang. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Key board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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