Pico Explorer Stopwatch ⏱️

A compact, lap-enabled stopwatch built for the Pimoroni Pico Explorer Base, using MicroPython and the picographics display library. Designed for clarity, tactile control, and segmented lap tracking with visual feedback.

Features

• 🟢 Start/Stop with Button X (GPIO 14)
• 🟡 Lap with Button Y (GPIO 15)
• 🔴 Reset with Button B (GPIO 13) or Button A (GPIO 12)
• 📺 Large main timer showing lap time while running
• 🕓 Secondary timer shows total race time after first lap
• 📋 Lap history displays last 4 laps in soft grey
• 🧠 Final lap auto-recorded when stopwatch is stopped
• 🧾 Idle screen shows button labels aligned with physical layout when reset

Display Behavior

• Idle (Reset): Screen shows “Start/Stop”, “Lap”, and “Reset” labels beside physical buttons
• Running: Main timer shows lap time; secondary timer shows total time (after first lap)
• Stopped: Main timer shows total time; secondary timer disappears
• Lap Pressed: Lap time is recorded and lap timer resets
• Stop Pressed: Final lap is recorded automatically

Hardware Requirements

• Raspberry Pi Pico (or Pico W)
• Pimoroni Pico Explorer Base
• MicroPython firmware with picographics and pimoroni libraries installed

Setup

1. Flash your Pico with Pimoroni's custom MicroPython firmware
2. Copy stopwatch.py to your Pico using Thonny or your preferred IDE
3. Run the script and interact using the onboard buttons

Button Mapping

Button	GPIO	Function
A	12	Reset
B	13	Reset
X	14	Start/Stop
Y	15	Lap

License

MIT License. See LICENSE.md for details.