Stopwatch

A two-button stopwatch (Start/Stop and Reset) on an OLED display.

Source book: Clocks and Watches
Kit page: https://dmccreary.github.io/clocks-and-watches/kits/stopwatch/
Printable one-pager: stopwatch-one-pager.html

Features

• Uses the Raspberry Pi Pico RP2040
• Uses the SSD1306 128×64 OLED

Benefits

• Free, open lessons: the Clocks and Watches textbook has the kit page, wiring, and MicroPython code.
• Try before you build: an interactive MicroSim on the kit page runs in the browser.
• Instant feedback: students see their code's results on lights or a display.
• Budget: about $14 (0.96" OLED about $4.40, two buttons about $0.50; Pico $4, breadboard $2, wires $1, USB cable $2).

Parts

• Raspberry Pi Pico ($4) — Microcontroller
• SSD1306 128×64 OLED — Display
• 830-Point Breadboard ($1.10) — Breadboard
• Micro-USB Data Cable ($2.50) — Power and programming cable