SR99-Keyboard-PCB

⚠️ WIP: Work in Progress design, and is not tested. Please hold-off on building until the design can be verified and the software is written.

Intent

A 980-layout (99-key) compact near-full size keyboard.

Progression

‼️ This is a "when I'm bored" project - so "significant" progress is not expected.

• 12 Jun 2026
  • KiCAD 10 re-do done, but not built
• 15 Nov 2025: Re-do begins!
  • EAGLE design abandoned in favour of KiCAD design
  • STM32F411 discarded for STM32G474
• 27 Sep 2024: Beta 1 done
  • ⚠️ Not manufactured
  • ⚠️ Not tested
• See CHANGELOG.md

Beta PCB renders

Top

Bottom (Component side)

◊

Layout ideation renders

Render

Layout

Matrix coordinates (QMK & VIA)

Planned Features

• QMK build, with Via/l support
• 1x STM32G474 STM32 CPU (based on Black Pill design)
• 1x M95640-DRE 8K SPI EEPROM Module
• 3x MC74HC589A SPI Input Shift Registers - possibly faster scan rates
• 2x IS31FL3743B RGB Drivers, with independent LDOs
• 2x SKYLOONG rotary encoder/switch positions
• UDB C-Series Usb-C JST-SH

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Made with ❤️ by Silvino R