For vocational school and university electronics students
Don't memorize electronics, learn it by doing.
From reading your first resistor to designing your own printed circuit board: lessons, realistic component visuals and circuit simulations that run in your browser, all in one place.
165
lessons
61
simulations
19
courses
Courses
Beginner, intermediate and advanced, with drawings, real photos and interactive simulations.
Component Library
Detailed visuals, pinouts and usage tips for every part.
Simulation
Build the circuit in your browser, change values and see the result instantly.
DIY Repair
Step-by-step troubleshooting guides for devices at home. For members.
Consulting
Get one-to-one help with your project, homework or a circuit you're stuck on.
Learning path
Pick your level and work through it in order.
Beginner
For absolute beginners: current, voltage, resistance, basic components and measuring instruments.
3 courses
Intermediate
Breadboard and soldering, testing parts, transistors, power supplies, op-amps, troubleshooting, TV and computer boards, Arduino.
9 courses
Advanced
PCB design, communication protocols, digital logic, op-amp circuits, register-level microcontrollers, power electronics and switch-mode supply design.
7 courses
Try it now: can you run the LED without burning it out?
Change the voltage and resistance. The LED burns out above 30 mA.
I = (V − VLED) / R = (9 − 2) / 470 = 14.9 mA
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