Clock

State Diagram

stateDiagram-v2

   %% Style overrides

    style HoursMinutes fill:#000,stroke:#333,stroke-width:2px,color:#ff4444,font-family:"Courier New",font-size:18px,font-weight:bold
    style MinutesSeconds fill:#000,stroke:#333,stroke-width:2px,color:#ff4444,font-family:"Courier New",font-size:18px,font-weight:bold
    style ShowSeconds fill:#000,stroke:#333,stroke-width:2px,color:#ff4444,font-family:"Courier New",font-size:18px,font-weight:bold
    style ShowMinutes fill:#000,stroke:#333,stroke-width:2px,color:#ff4444,font-family:"Courier New",font-size:18px,font-weight:bold    
    style ShowHours fill:#000,stroke:#333,stroke-width:2px,color:#ff4444,font-family:"Courier New",font-size:18px,font-weight:bold
    

    HoursMinutes --> MinutesSeconds : Tap
    MinutesSeconds --> HoursMinutes : Tap
    HoursMinutes --> ShowSeconds : Press & Release
    MinutesSeconds --> ShowSeconds : Press & Release
    ShowSeconds --> ShowMinutes : Tap
    ShowSeconds --> EditSeconds : Press
    EditSeconds --> ShowSeconds : Release
    ShowMinutes --> ShowHours : Tap
    ShowMinutes --> EditMinutes : Press
    EditMinutes --> ShowMinutes : Release
    ShowHours --> HoursMinutes : Tap
    ShowHours --> EditHours : Press
    EditHours --> ShowHours : Release

    HoursMinutes: HHMM
    MinutesSeconds: MMSS
    state "  ✨SS✨  " as ShowSeconds
    EditSeconds: *to 00*
    state "    ✨MM✨" as ShowMinutes    
    EditMinutes: *increments*
    state "✨HH✨    " as ShowHours
    EditHours: *increments*

Loading

Note: ✨ indicates blinking.

Display Modes

• HHMM
• MMSS

Tap: Switch between the two display modes.

Press & Release: Move to the edit modes.

Edit Modes (blinking)

• ✨SS✨
• ✨ MM✨
• ✨HH ✨

Tap: Move through the three edit modes and then return to the display modes.

Press: Change the value. Seconds go to 00. Minutes and hours increment quickly.

Release: When the value is what you wish.

Wiring

See the slides from the June, 2024 Seattle Rust User Group meeting for the wiring diagram. Press the down arrow to the slide for each step. This design shows one resistor for each display digit. Alternatively, you can use one resistor for each segment for slightly more even brightness.

Tools & Debugging

This is project is setup to use probe-rs. The setup is based on https://github.com/U007D/blinky_probe/tree/main from the Embedded Rust Hardware Debug Probe workshop taught at the Seattle Rust User Group in November 2024.

License

Licensed under either:

• MIT license (see LICENSE-MIT file)
• Apache License, Version 2.0 (see LICENSE-APACHE file) at your option.