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Exploring Electronics

Exploring ElectronicsšŸ”—

Every circuit is a push, a flow, and something in the way.

Learn those three properly and the rest of electronics stops being magic: why a bird can sit on a power line, why a cold light bulb reads 10 Ī© on a meter, why every LED needs a resistor.

This site teaches electronics from the atom up, with numbers from real datasheets and measurements, circuits drawn as real schematics, and nothing that assumes you've done this before.

Pick Your Starting PointšŸ”—

  • Brand new to electronics

    Start at the atom and climb one step at a time. No background needed.

    Conductors, Insulators, and Semiconductors

  • Want to build something today

    Wire a real circuit and make an LED blink, then come back for the why.

    Blink an LED

  • Staring at a schematic

    Learn the symbols and follow the current through any circuit diagram.

    How to Read a Schematic

  • Studying for amateur radio

    The exam's electronics sections, taught for understanding, not memorization. Exploring Radio maps the Canadian Basic exam's electricity questions to these articles.

    Start with Voltage

Explore by TopicšŸ”—

  • Circuit Foundations

    What electricity actually is, from the atom to capacitors and inductors, with real numbers. Fourteen articles, read in order.

    Explore Circuit Foundations

  • Components

    The parts on the bench: resistors, diodes and LEDs, transistors, vacuum tubes, sensors, and how to read them.

    Explore Components

  • Microcontrollers

    Make an Arduino sense the world and react to it, from a blinking LED to a temperature monitor.

    Explore Microcontrollers

  • Reading Circuits

    The visual language every circuit is written in.

    How to Read a Schematic

  • Communication

    How boards, sensors, and computers talk: serial, IĀ²C, and SPI, down to the voltages on the wires.

    Explore Communication

  • Power

    Where a circuit's energy comes from: batteries, regulators, and power supplies.

    Explore Power

  • Practical Tools

    The bench equipment, read as you need it: breadboards, arduino-cli, the multimeter, the bench power supply, and soldering.

    Explore Practical Tools

How This Site TeachesšŸ”—

  • Real numbers

    Values come from manufacturer datasheets, standards, and published measurements, and every calculation is worked through.

  • Pictures that explain

    3D figures show the mechanism; real schematics teach the notation you'll meet everywhere.

  • Safety first

    Articles spell out what's safe, what can damage a part, and what can hurt you.

  • Practice built in

    Articles end with practice problems and full solutions you can check.

Part of the BradPenney.io NetworkšŸ”—

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