10 Core Concepts
Before building, you need to know what the pieces are. Each concept is a short 1–2 minute video — one idea, explained simply with a real-life analogy.
What is Electricity?
The invisible force that powers everything around you. We'll discover what electrons are, why they move, and what that movement actually means.
What is Voltage?
The pressure that pushes electricity through a wire. Measured in Volts — from a 1.5V battery to a 220V wall socket.
What is Current?
How much electricity actually flows through a wire each second. Measured in Amperes — the quantity, not the force.
What is Resistance?
The thing that slows electricity down. Measured in Ohms. V = I × R — Ohm's Law ties all three together.
What is a Resistor?
A component whose entire job is adding a specific amount of resistance. Those colored stripes? They're a code that tells you exactly how many Ohms.
What is a Diode?
A component that only allows electricity to flow in one direction. The right way — current flows. Backwards — nothing happens.
What is an LED?
Light Emitting Diode — a special diode that produces light when current flows through it. In your Robotik kit you have four colors. They're the first thing you'll bring to life.
What is a Capacitor?
Stores electrical energy and releases it in a burst. Unlike a battery, it charges and discharges in milliseconds.
What is a Transistor?
The most important invention of the 20th century. It's a switch and an amplifier in one tiny package — and your phone has billions of them. A small signal controls a much larger one.
What is a Microcontroller?
A tiny computer on a chip. It has a processor, memory, and — most importantly — pins that connect to the physical world. Read inputs. Control outputs. That's engineering thinking.