Wire it: schematic puzzles that teach the circuit
Five circuits to wire, one part at a time
Open Wire it from Learn or the Playground. Tap a part, tap the dashed spot it belongs in, and the board tells you right away: fits, wrong part, or right part placed backwards. Three mistakes clear the board; fewer mistakes earn more stars.
Then watch it run, and break it on purpose
Once wired, current flows along the schematic in slow motion. Tap any part to pull it out and read what the circuit does without it, in plain words. Every piece has a short note on why it is there and what it sets.
Learn is now one place: Lessons, Labs and Puzzles
The Learn page is now a hub with three doors. Lessons explain the why, Labs let you turn the knobs, Puzzles ask you to prove it. The course keeps its chapters at the same addresses; the index moved to Learn, then Course.
Also: react to news right from the home page
The latest post on the home page now carries the same reaction bar as the full article, with counts, so you can react without leaving the page.