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pyKeyboardOS

A Real-Time OS built for Keyboard using CircuitPython.

S68K7 S68K6 S68K4_and_S68K5

Software

Files

  • module/keyboard: Circuit Python Keyboard(usb & ble)

Usage

Circuit Python Keyboard

  • Fn + Q: connection via right usb type-c

  • Fn + W: connection via upper usb type-c

  • Fn + E: connection via bluetooth

  • Fn + BackSpace: erase saved bluetooth info(use when connection error)

  • Fn + TAB: switch rgb lighting mode

  • Fn + UP_ARROW: light++

  • Fn + DOWN_ARROW: light--

  • Fn + Home: PageUp

  • Fn + End: PageDown

  • Fn + Esc: PrtSc

  • Fn + 1-10,-+: F1-12

Changes

2024.11.17

2024.11.05

2024.11.01

  • Fix Bluetooth(hardward issue)
  • Add Basic RGB colors
  • 6-key sequential(via upper usb type-c)

2024.10.21

  • Update PCB adaptation
  • Disable BLE

2024.10.08

  • Middle Term Report
  • Final Goal: Basic Keyboard + Sleep Mode + At Least One Modular Module (Camera, Screen, Numpad, etc.).
Basic Keyboard
  • Connection via USB or BLE.
  • Basic RGB lighting
  • Basic key mapping
Sleep Mode
  • Auto-sleep (low power mode)
  • Low-latency waking
Modular Modules
  • Camera
  • Screen
  • Numpad
  • Knobs
  • Motor

2024.10.05

  • Add independent camera code

2024.09.27

  • Set the CH9329 as the default connection.
  • When using the CH9329 connection, if more than six keys are pressed simultaneously, the additional (beyond six) keys will be released in the order they were pressed.

Tracking

Hardware

Prototype Keyboard Case Design

  • Foot Pads: Completed √
  • Li Battery: Completed √
  • Upper-side USB port: Completed √
  • USB HUB: Testing
  • Dry Battery: Designing

S68K7 2024.10.28 (Unstable, debugging)

Schematic Diagram (Non-final version, proceed with caution.)

Key Light Power Control

PCB (Non-final version, proceed with caution.)

S68K7

  • The voltage of the dry battery boost system is low.
  • When powered by USB, the battery pin voltage of the IP5407 should not be left floating.
  • There is a conflict between the two USB ports.

S68K6 2024.10.13 (success; Prototype 2)

  • Use IP5407 power circuit(works fine).
  • Add USB Type A for external power supply.

S68K5 2024.9.30 (failed; power)

  • Use SX1308 power circuit(significant error)
  • Place the battery interface on the top
  • Thickness of the main control board
  • Front height, foot support
  • Check key position coordinates

S68K4 2024.8.26 (partial success; Prototype 1)

  • Use ETA9741 power circuit
  • Replace single-channel AND gate circuit
  • Automatic charge-discharge switching
  • Battery switch MOS control
  • Physical battery switch position
  • MCU main control board
  • Key alignment
  • PCB shape

S68K3 2024.8.19 (failed; power)

  • RGB input signal interruption (replace 470K resistor with 500Ω and add 3.3v-5v boost circuit) √
  • Battery charging anomaly (seems fine, recheck; prone to failure?)
  • Charging circuit capacitor optimization
  • Charging indicator light arrangement optimization √
  • Replace charging interface with a surface mount √
  • Reduce component variety
  • USB to TTL chip √
  • USB Type-C pin GND reversed (Done, to be checked) √
  • Consider moving USB Type-C upwards

S68K2 2024.7.31 (failed; power, led)

  • RGB LED pin assignment error (replaced backing in the next design)
  • Power supply short circuit (replaced battery chip in the next design)

TODO:

  • Add Prototype Picture
  • Migrate to MicroPython

Reference