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Electrical track
Electrician training

Electrician training online: the circuit skills, free

Practice the electrical theory part of the trade: Ohm's law with a real meter, series and parallel, relays, rectifiers and the power-off checks, in a simulator.

FreeIn your browser4 courses, 36 lessons, about 18 hours
Start freeVolts, amps and ohms with a real meterSee the course
Overview

How you will learn it

Becoming a licensed electrician takes classroom hours, an apprenticeship and a state exam, and no website replaces those. What you can do online is get very good at the theory first, so the classroom is review and the job site makes sense on day one.

These lessons cover the circuit skills the trade relies on, on a simulator where a mistake costs nothing: measuring volts, amps and ohms the right way, series and parallel loads, relays, rectifiers and the checks you make with the power off.

Outcomes

What you will learn

  • Use Ohm's law and power to predict a circuit, then check it with a meter.
  • Work out series and parallel circuits, for loads and for batteries.
  • Do continuity, resistance and diode checks with the power off.
  • Explain how a relay switches a bigger load and how a rectifier makes DC.
Your route

The courses and lessons to take

Every lesson opens in the editor right away, signed in or not, and the simulator checks each step.

  1. Step 1 路 7 lessons 路 3 h

    Power and batteries

    Ohm's law with a real meter, then series and parallel.

    1. Volts, amps and ohms with a real meterA bench supply, a 10 ohm resistor and a multimeter: what voltage, current and resistance are, Ohm's law in one line, and what a current limit does when the law asks for too much.
    2. Batteries in series and parallelTwo AA cells in series light a flashlight bulb, and two in parallel barely glow it: volts add in series, run time adds in parallel, and the rules for packing cells safely.
    3. A voltage regulator: 9 V in, 5 V outA 7805 turns a 9 V battery into a steady 5 V: its three legs and two capacitors, the dropout when the battery runs down, the heat it makes, and an AMS1117 that needs far less headroom.
    Every lesson in the course
  2. Step 2 路 20 lessons 路 10 h

    Electronics basics

    The fundamentals behind every circuit.

    1. Ohm's law: volts, amps and ohmsOne resistor across 5 V. Change the resistor and watch the current change, then pick a resistor for a current you want. The one equation behind every circuit.
    2. Branches in parallelTwo LED branches across the same supply. Each one sets its own current, the supply carries the total, and two resistors side by side come out smaller than either.
    3. The transistor as a switchA tiny current into the base switches a big current through the collector. Switch an LED with a transistor and measure how much smaller the control current is.
    4. From the wall to DC: a rectifier and a capacitorOne diode blocks the negative half of an AC wave, and a big capacitor fills the gaps. Watch AC turn into smooth DC, and see what a small capacitor or a heavy load does to it.
    Every lesson in the course
  3. Step 3 路 6 lessons 路 2 h

    Debug like an engineer

    Meter technique and the power-off checks.

    1. The multimeter: volts across, amps throughTwo meters on one LED circuit: a voltmeter across the LED and an ammeter in the loop. Why one goes across and the other goes in line, and how to check Ohm's law against real readings.
    2. The power-off checks: ohms, continuity and diodesThree meters on a circuit with no supply at all: one reading a resistor, one beeping across a switch, one testing an LED. Why these checks need the power off, and what each one tells you.
    Every lesson in the course
  4. Step 4 路 3 lessons 路 3 h

    Build a smart home hub

    Relays switching a lamp and a fan, and why they are wired that way.

    1. A dashboard that switches real thingsServe a web page from the ESP32-C3 and use it to switch a lamp and a fan through relays, and to dim a porch light. Why a relay, and why it is wired the way it is.
    Every lesson in the course
Keep going

Guides and tools on the same subject

Track

Electrical track

Current and voltage you can see, then transistors, op-amps, filters, power and PCBs. Every circuit runs in a real circuit simulator in your browser.

See the whole track
Questions

Questions people ask

Can I become an electrician online?

Not entirely. Licensing needs an apprenticeship and an exam in your state. Online study is a strong way to learn the theory before or alongside that.

Does this cover the National Electrical Code?

No. These lessons teach circuit theory and measurement. Code requirements come from your apprenticeship and code classes.

Is practicing on a simulator useful?

Yes, for theory and measurement. You can make every mistake, such as measuring current across a supply, and see what it would do without any danger.