Electronics Fundamentals

Explore & Discover

Watch "How does electricity work?" on the Physics Girl or Veritasium YouTube channels — these videos make electrons, voltage, and current click in a way that textbooks never do. Then explore the free interactive simulator at phet.colorado.edu (built by the University of Colorado) and play with the "Circuit Construction Kit" — you can build circuits on screen without any real parts. Notice how adding more batteries increases brightness, and how a broken wire stops everything. This is the same logic that powers every device you own. You're ready for the next step when you can explain in your own words what voltage, current, and resistance do in a simple circuit.

Learn the Basics

Build three circuits on a breadboard: a basic LED light, an LED with a resistor (so it does not burn out), and a simple switch circuit that turns an LED on and off. Watch "Arduino Tutorial for Beginners" on Paul McWhorter's YouTube channel — his series is free, patient, and used by thousands of students. Learn to read a basic circuit diagram (schematic) so you can understand what to connect before you touch any wires. The free app iCircuit lets you test circuits virtually before building them. You're ready for the next step when you can build a working LED circuit with the correct resistor value calculated from the LED's voltage rating.

Build Your First Project

Connect an Arduino Uno to your computer and upload your first program using the free Arduino IDE software. Start with the built-in "Blink" example — it flashes the onboard LED and proves your setup works. Then write code to make an external LED blink in a pattern you choose, like an SOS signal in Morse code. Extend your project by adding a button: pressing it changes the blink speed. Each new feature is a small win. Comment every line of your code so you remember what it does a week from now. You're ready for the next step when your Arduino responds to a button press and changes the LED behavior based on your custom code.

Experiment & Iterate

Add sensors to your Arduino project. Wire up a temperature sensor (DHT11 or DHT22) and display the readings in the Arduino Serial Monitor — your computer screen becomes a live data display. Then add a simple buzzer that beeps when the temperature goes above a threshold you set. Try different threshold values and observe how the system responds. Search YouTube for "Arduino DHT11 tutorial" if you get stuck — there are dozens of free walkthroughs. Think about real applications: this is basically how a thermostat works. You're ready for the next step when your circuit reads temperature data and triggers an alarm automatically based on a value you programmed.

Advanced Techniques

Learn to read and draw your own circuit schematics, then design a multi-component project from scratch without following a tutorial step-by-step. Sketch the circuit on paper first. Then explore surface-mount components and learn what makes them different from the through-hole parts you have been using. The free tool KiCad (kicad.org) lets you design real printed circuit board (PCB) layouts — the same software professionals use. Watch "KiCad for Beginners" on YouTube and design one simple PCB layout even if you do not have it manufactured. You're ready for the next step when you have designed an original circuit on paper and laid it out in KiCad as a schematic.

Final Project Showcase

Build one complete, original electronic device that solves a real problem or does something genuinely interesting. Ideas: a weather station that logs Salt Lake City temperature and air quality (relevant given Utah's inversion season), a sound-reactive LED display, or a custom game controller. Your device should have at least two sensors or inputs, an Arduino brain, and a clear output. Write up how it works in a short document, including your schematic. Post photos and your code to GitHub. Share it at a local event — check Makerspaces in Salt Lake like the Sweat Shop Maker Space. You're ready for the next step when your device works reliably, the code is on GitHub, and you can explain every component's job to someone who has never seen it.