Beginning Electronics Lessons

Every lab below builds a real circuit with parts from the course's $50 kit. Each one links to a chapter that teaches the theory first — start there if a lab's "Before You Start" table names a prerequisite you haven't read yet.

The colored dot beside each lab in the sidebar shows how finished it is: green means publish-ready, amber means teachable but incomplete, and grey means it's still a stub. See the lab evaluator's scoring bands for the full scale.

• Identification of Parts

  

  Match every part in your $50 kit to its name, symbol, and job.

• Breadboarding Basics

  

  Learn how a breadboard's hidden rows and rails connect underneath the holes.

• Power

  

  Compare ways to bring 5 volts safely to your breadboard's power rails.

• Your First LED Circuit

  

  Light an LED on a breadboard with a current-limiting resistor, and learn to spot the four mistakes that keep an LED dark.

• LED Button Circuit

  

  Add a push button in series with your LED so you decide when it lights.

• And Buttons

  Wire two buttons in series so pressing both — and only both — lights the LED.

• Or Buttons

  Wire two buttons in parallel so pressing either one lights the LED.

• RGB LED Circuit

  

  Wire a common-cathode RGB LED and mix red, green, and blue with three resistors.

• 555 Timer LED Blinker

  

  Wire a classic NE555 astable circuit that blinks an LED on its own forever, and calculate exactly how fast it blinks.

• 555 Timer Buzzer and Siren

  

  Drive a piezo buzzer straight from a 555 timer, then swap in a trim pot to turn the pitch into a rising-and-falling siren.

• 555-Driven LED Bar Graph

  

  Wire a 555 clock into a 74HC595 shift register so eight LEDs fill up one at a time, then press a button to clear the bar and watch it fill again.

• Dark Detector

  

  Build a light-sensing circuit that switches an LED on automatically when it gets dark.

• Transistors

  

  A reference tour of common transistor types and what their datasheets mean.

• Comparing the BC547 vs. the 2N2222 Transistors

  Compare two popular NPN transistors side by side.

• Boolean Logic Gates From Transistors

  

  Build AND, OR, NAND, NOR, XOR, and XNOR gates from individual transistors.

• LED Noodle Circuit

  

  Drive a high-current LED strip safely using a transistor as a switch.

• Driving a Motor and a Buzzer Safely

  

  Build a button-controlled transistor motor driver protected by a flyback diode, then swap the motor for a buzzer.

• Meet Your Multimeter

  

  Put a multimeter on a circuit you already trust and turn four of this book's promises into numbers you measured yourself.

• Hunt Down a Hidden Fault

  

  Measure a healthy circuit's baseline, then use half-split testing to find a hidden fault in three measurements or fewer.

• Using Perf Boards

  An optional, beyond-the-kit guide to transferring a circuit from breadboard to solder.

• RC Circuit

  Time a resistor-capacitor circuit's charge and discharge curve.