Learn Ruby vs Learning transistor

Learn Ruby from scratch — no experience needed. Bite-sized Ruby lessons, a real code editor on your phone, and an AI mentor that answers your questions in seconds. Built for complete beginners, students and career switchers. WHY LEARN Ruby? • Ruby is an in-demand skill — a strong addition to any resume • Learn by doing: every lesson mixes short theory with hands-on practice • Build real foundations you can use in projects, work and interviews • Start from zero — every concept is explained in plain language WHAT YOU'LL LEARN • Ruby fundamentals — the core concepts, step by step • The essential building blocks used in real-world Ruby work • Practical techniques you can apply right away • Common mistakes — and how to avoid them • Hands-on exercises after every topic • Advanced topics to keep growing beyond the basics EVERYTHING YOU NEED TO LEARN Ruby • AI Mentor — stuck on a concept or an error? Ask anything and get a clear answer in seconds • 100+ bite-sized lessons (5–10 minutes each) — built for real life, not lecture halls • Real code editor — write and run Ruby code right on your phone • Quizzes and coding challenges after every topic to lock in what you learn • Weekly Code Challenge — compete with learners around the world • Certificate of completion — pass the final exam and prove your skills • Streaks, progress tracking and smart reminders to keep you consistent • Learn on the go — lessons load fast and keep working on flaky connections • App available in 22 languages WHO IT'S FOR • Complete beginners taking their first steps • Students who want extra practice alongside classes • Career switchers building job-ready skills • Anyone curious about Ruby Part of CoddyKit — a family of 40+ coding apps trusted by 100,000+ learners worldwide. Free to start: your first course is free, with a daily AI Mentor allowance. Pro unlocks every course, removes ads and gives you unlimited AI Mentor. Download Learn Ruby: Code & Build and write your first line of Ruby today. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.coddykit.com/terms/privacy-policy

How does a computer actually compute? Not metaphorically — physically. Learning Transistor answers that question in 14 interactive screens, starting from a single transistor and ending at a working one-bit computer you can step through with your finger. Every screen is a live circuit. Current flows as moving dots, voltage glows on the wires, and every input is yours to flip. Nothing is a video, and nothing is a quiz — you learn by turning things on and off and watching what the electrons do. THE JOURNEY - Meet Transistor Man — the classic mental model of how a transistor keeps its collector current exactly 100 times the base current, and what happens when it can't - The transistor switch: how 9.4 mA of base current lights a 100 mA lamp - The NOT gate: how a resistor and a transistor turn voltage into logic — and why "1" costs no current at all - NAND and NOR at the transistor level: series vs parallel, and why these two gates can build everything else - The symbol language: the D-shape, the pointed shape, and the little circle that flips every answer - Building with gates: AND from NANDs — abstraction you can tap to open and see the transistors still working inside - The SR latch: two crossed gates that remember one bit after your finger leaves the screen - XOR and the half adder: the moment logic becomes arithmetic, and 1 + 1 becomes 10 - The finale: memory + adder + feedback + a STEP clock — a one-bit computer, with every layer tappable all the way down to the silicon FREE TO START The first two screens — Transistor Man and the transistor switch — are free. A single purchase unlocks the rest of the journey. No subscriptions, no ads, no accounts, no data collection. Inspired by the classic figures of The Art of Electronics. Made for curious minds who want to know what is really happening inside the machine they are holding.