An electronics engineer designs, builds and tests circuits and systems, from a sensor board in a medical device to the control electronics in an aircraft. Most people in the job (83%) hold a bachelor's degree in electrical or electronics engineering, and a smaller group (14%) start with a 2-year degree. You can learn the real skills for free: circuit theory from MIT OpenCourseWare, hands-on practice in free simulators like LTspice and KiCad, and programming in C and Python. The path below builds in order. First you learn why current, voltage and resistance behave as they do. Then you build and
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Every stage from beginner to expert, with lessons, practice drills, projects, interview questions and free resources. Free with a Rolearch account.
Stage 1 of 4 · about 24 weeks
Master DC and AC circuit analysis (Ohm's law, Kirchhoff's laws, Thevenin equivalents, RC/RL/RLC response), basic algebra, trig and calculus, and the behavior of diodes and transistors. Simulate simple circuits in LTspice and build a few on a breadboard with a cheap multimeter. Start learning C and Python basics.
DC circuit analysis
Every circuit you will ever design, debug or review is built on Ohm's law and Kirchhoff's laws. Engineers use them daily to size resistors, check power budgets and find out why a board does not behave.
Math for circuits: algebra, trigonometry, complex numbers and calculus
Circuit behavior over time and frequency is written in math. You do not need to be a mathematician, but you must be fluent enough that equations become tools instead of obstacles.
Capacitors, inductors and transient response (RC, RL, RLC)
Real signals change over time: power-up, switching, a button press, a motor starting. Understanding how storage elements respond is how you predict delays, ringing and overshoot before they cause bugs.
AC analysis, phasors and first-order filters
Power lines, audio, radio and clock signals are all sinusoidal or built from sinusoids. Phasors turn calculus into algebra and give you impedance, which is how engineers think about every filter and signal path.
Diodes, transistors and bench basics (LTspice, breadboard, multimeter)
Diodes and transistors are where circuits start to do useful things like rectify, switch and amplify. Learning to simulate and then measure builds the habit that separates working engineers from people who only calculate.
Programming basics in C and Python
Modern electronics engineers write code every week: C for firmware on microcontrollers, Python for test automation, data analysis and quick calculations. Starting now makes later embedded work much easier.
Then 3 more stages (about 152 weeks in all) with lessons, drills, projects, 10 interview questions with strong answers and free resources.