Free online course Practical Electronics for Non-EEs: Power Sources and Real-World Circuits

About the free online course

Working with electronics in the field often means making good decisions without a full electrical engineering background. This course is designed for technicians, makers, electricians, and anyone who needs practical intuition about power sources and real-world circuits. You will learn how voltage and current behave in everyday situations, how to interpret common labels and measurements, and how to avoid the most frequent wiring and power mistakes that cause overheating, noise, or unreliable operation.

A major focus is power: batteries, series vs parallel connections, DC-to-DC converters, and why linear regulators can waste significant energy when stepping down voltage at higher currents. You will also connect the dots between bench supplies, constant-current behavior, and what it means when the supply refuses to hold the voltage you set. These topics are approached from a practical perspective so you can choose and troubleshoot power solutions with confidence rather than guesswork.

You will then move into switching and control in a way that maps directly onto real projects: using MOSFETs to drive motors and loads, understanding what truly sets motor current, and why PWM is usually the efficient choice compared with analog control. Protective components such as flyback diodes are explained in terms of what inductive loads do in the real world and how that can damage switching devices if not handled properly.

Measurement and signal handling are treated as everyday skills, not abstract theory. You will practice reading digital waveforms, setting up a function generator for logic-level signals, and understanding how frequency and duty cycle can be measured even with limited instruments. From there, you will see how signal conditioning makes sensors usable, including common approaches used for thermocouples, photodiodes, strain gauges in Wheatstone bridges, and current measurement with shunt resistors.

To round out a modern practical toolkit, the course connects electronics fundamentals to embedded and connected systems: why microcontrollers are commonly used, why hexadecimal is the natural language of registers, and safe ways to interface different logic voltages. You will also gain a clearer picture of how data and energy move in communication systems, from MQTT publish/subscribe roles to the basics of RF transmitters, simple link budgets in dB, and why low-noise amplifiers sit close to antennas. By the end, you should be able to reason about power, measurement, control, and interfacing in a grounded, job-relevant way that transfers directly to the circuits you encounter.