Introduction to Electronics Fundamentals

Classify circuits by connectivity into open and closed types, where open circuits block current due to an opening, while closed circuits provide a path for current to flow, with examples.

Explore series and parallel circuits to see how current and voltage behave with resistors, using total resistance formulas for series and parallel, and note current division in branches.

Apply Kirchoff's voltage law to closed loop circuits, where the total voltage around the loop equals zero, balancing the voltage source with voltage drops across components.

Learn Kirchhoff's current law: at any node, the algebraic sum of currents is zero, so currents entering a junction equal currents leaving.

Explore the basics of printed circuit boards, two-sided layouts, and how lines connect resistors, capacitors, switches, and transistors to power a circuit. See prototype and factory-grade boards, and practice soldering.

Explore voltage and current divider rules to allocate voltage and current in resistive circuits, using R1 and R2 ratios, vout, and branch currents while conserving current.

Explore how the voltage divider rule splits input voltage across series resistors to produce a middle output, illustrated with circuit variations and browser simulations.

Learn how to derive the voltage divider formula for two resistors in series and apply it to compute the output voltage from the input, using vin, r1, r2, and vout.

Explore the uses of voltage divider and how potentiometers act as variable resistors to distribute voltages according to circuit design needs.

Explore current divider part 2 in a two-resistor parallel circuit, derive rt = (r1*r2)/(r1+r2), and apply i1 = It*r2/(r1+r2) and i2 = It*r1/(r1+r2).

This lecture corrects a previous current divider error and demonstrates calculating branch currents from I total using resistor values, including 7.5 million and 2.5 results, and guides you to resources.

Differentiate electrical and electronics engineering by focusing on power generation, transmission, storage, and control versus circuit design, microcontrollers, and electronics hardware for devices.

Explore motor drives and the four main motor types—dc motors, ac motors, servo motors, and stepper motors—along with rotor and stator roles, feedback, and pwm control for robotics.

Master digital prototyping by using circuit simulators to validate designs before building on breadboards. Explore Fritzing for PCB layout and free tools like Fusion 360 or Google SketchUp.

Explore Fritzing for electronics prototyping, navigate parts, breadboard view, schematic view, and PCB view, and learn how to connect wires and write code.

Discover the Raspberry Pi, a pocket-sized computer with a processor, memory card storage, and ethernet, and learn how it differs from microcontrollers and microprocessors.

Learn buzzer circuit basics by powering a buzzer from an Arduino pin through a resistor, understanding current flow, polarity, and a working loop for prototyping circuits.

Experiment with a buzzer by adjusting tone frequency and delay in an Arduino sketch, using pin nine as output and uploading to hear frequency from 200 Hz to 2 kHz.

Create a simple fan using a dc motor, blades, and a 9-volt battery to explore basic electronics. Observe how the plus and minus terminals affect polarity and rotation direction.

Explore how the L293D motor driver uses enable and input pins to control a dc motor, enabling forward and reverse motion with proper protection and power wiring.

Learn how to operate and program servo motors, connect a three-wire micro servo, and control 0–180 degree motion with pulse signals and example code for hands-on robotics.

Explore the fundamentals of control systems, including open loop and closed loop architectures with feedback and block diagrams. See how feedback enables automatic adjustment, exemplified by home heating systems.

Master the basics of soldering: learn how to connect wires and components on a printed circuit board with a soldering iron, using safety goggles and essential safety practices.

Learn to use a soldering iron to create permanent PCB connections, joining components like resistors, with a soldering stand and sponge.

Conclude by showing how controlling current yields immediate results and how digital electronics uses logic and binary (zeros and ones) as the language of computers.