Led
Day 2: Blinking an External LED & Understanding the Breadboard
Day 2 of Learn Coding with Arduino — wire up your own LED on a breadboard, learn why resistors matter, and blink it from the Uno.
Day 6: Build a Traffic Light System
Day 6 of Learn Coding with Arduino — build a full red-yellow-green traffic light with realistic timing, then add a pedestrian button that overrides the cycle.
Day 10: Project — Smart Night Light
Day 10 of Learn Coding with Arduino — build a smart night light that turns on automatically when it gets dark, with a manual override button.