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Chapters

This textbook is organized into 26 chapters covering all 500 concepts from the learning graph.

Chapter Overview

  1. Electricity Basics: Voltage, Current, and Resistance — This chapter introduces the core electrical quantities that every later chapter depends on: electric current, voltage, resistance, and Ohm's Law, along with basic circuit types and terminal/lead vocabulary.
  2. Current, Charge, Units, and Electrical Safety — Building on Chapter 1, this chapter covers how current actually flows (electron flow vs.
  3. Circuit Analysis, Kirchhoff's Laws, and Energy — This chapter deepens circuit-analysis intuition with Kirchhoff's Current and Voltage Laws, AC vs.
  4. Series, Parallel, and Circuit Topology — Students explore how resistances combine in series and parallel, voltage references, current dividers, and the vocabulary of circuit topology (nodes, loops, branches).
  5. Conductors, Batteries, and Circuit Vocabulary Review — The final foundational chapter covers conductors, insulators, and semiconductor materials, battery behavior (capacity, internal resistance, terminal voltage), and the last of the circuit-analysis vocabulary.
  6. Meet Your Breadboard — Students' first hands-on chapter: how a solderless breadboard's internal rows, columns, and power rails connect components together, and how to safely connect a battery pack or USB power supply.
  7. Wiring Skills and Circuit Layout — This chapter builds practical wiring skills — jumper wire types, wire gauge, color-coded wiring, and reading a wiring diagram — that make every later hands-on chapter faster and less error-prone.
  8. Troubleshooting and Optional Perfboard Packaging — Students learn systematic breadboard troubleshooting habits (checking for loose connections, bent leads, wrong-row placement) that they will use for the rest of the course.
  9. Resistors and Capacitors — The first passive-component chapter introduces resistors and capacitors: fixed vs.
  10. Capacitor Timing and Resistor Values — This chapter covers the specific resistor values used throughout the course's labs, plus how a capacitor charges and discharges over time and the RC time constant that governs it — a concept that resurfaces later in the 555 timer chapter..
  11. Resistor Codes and Capacitor Details — Students learn to read a resistor's color bands and a capacitor's printed value code, and meet the different resistor and capacitor types (carbon film, metal film, electrolytic, ceramic, tantalum) they'll encounter while sorting their kit..
  12. Diodes and LEDs — This chapter covers diode behavior — forward and reverse bias, rectifier and Zener diodes — and the electrical characteristics of LEDs (forward voltage, current rating, polarity) that set up every LED circuit built in the Output Components chapters..
  13. Meet the Transistor — Students meet the transistor: how its base, collector, and emitter let a small signal switch or amplify a much larger current, comparing the course's two transistors (BC547 and 2N2222).
  14. The 555 Timer Chip — This chapter introduces the classic 555 timer IC — its pin configuration and its astable and monostable modes — for building circuits that blink an LED or sound a buzzer on a schedule the student designs..
  15. Shift Registers and IC Handling — Students learn the 74HC595 shift register for controlling many LEDs from just a few input wires, plus general skills for safely inserting, orienting, and reading the pinout of any integrated circuit..
  16. Switches, Buttons, and Wired Logic — This chapter covers push buttons and switches, and the course's signature no-code trick: wiring two buttons in series to build an AND gate, or in parallel to build an OR gate, using nothing but wires and switches..
  17. Sensing Light: Photoresistors and Dark Detectors — Students build the classic 'dark detector' night-light circuit using a photoresistor and a voltage divider, and meet the general vocabulary of analog and digital inputs that applies across every sensor in the kit..
  18. LEDs, RGB Color, and Motors — This chapter covers driving single-color and RGB LEDs (including mixing custom colors), LED strips, and controlling small DC motors and their direction — the course's core visible and moving outputs..
  19. Driving Outputs: Motors, Buzzers, and More — Students go deeper into motor-driving details (stall current, back-EMF, noise suppression) and meet buzzers and general output-protection concepts needed before combining outputs into a real project..
  20. Using a Multimeter — This chapter teaches students to read voltage, current, resistance, and continuity with a multimeter, and to test individual components (resistors, diodes, LEDs) before or after placing them in a circuit..
  21. Systematic Troubleshooting — Students learn a structured troubleshooting process — checking power first, half-split testing, comparing to a known-good circuit, and isolating one variable at a time — for diagnosing any circuit that isn't behaving as expected..
  22. Batteries, Regulators, and Buck Converters — This chapter covers battery types and safe handling, the 7805 linear voltage regulator, and how a buck converter steps a higher voltage down efficiently — the first of the course's real-world power kits..
  23. Signal Generators and Solar Power — Students explore the XR2206 signal-generator kit's sine, square, and triangle wave outputs, plus solar cells and safe battery-charging circuits for a solar-powered night-light project..
  24. Boolean Logic and Transistor Gates — This chapter formalizes Boolean AND/OR/NOT reasoning with truth tables, then shows students how to build their first transistor-based logic gates — connecting back to the wired-switch logic from the Switches chapter, now built from active components..
  25. NAND, NOR, XOR, and the RS Latch — Students complete the course's digital-logic toolkit with NAND, NOR, and XOR gates, and build a simple RS latch — the course's only taste of digital memory, foreshadowing the flip-flops and memory cells in the final chapter..
  26. Advanced Circuits and Your Capstone Project — The course's capstone chapter combines everything into named real-world projects — a busy board, a solar night light, an LED noodle costume — and walks students through planning, designing, prototyping, and demonstrating an original capstone project of their own..

How to Use This Textbook

Chapters are ordered so that every concept's prerequisites appear in an earlier (or the same) chapter — you can read straight through from Chapter 1, or jump to a specific topic and follow its "Prerequisites" links backward to fill any gaps. Chapters 1-5 are pure theory with no hands-on building; Chapter 6 onward assumes you have a solderless breadboard and the course's $50 kit of parts in front of you.

Note: Each chapter includes a list of concepts covered. Make sure to complete prerequisites before moving to advanced chapters.