Start with the basics.
14 short lessons. About an hour total. By the end you will never look at a light bulb the same way.
Progress
0 of 14 read
What's going on?
The big picture — what electricity actually is.
Lesson 15 min
What is electricity?
It's like water flowing through pipes — except much, much faster.
Lesson 26 min
Voltage and current
Voltage is the push. Current is how many electrons get pushed.
Lesson 36 min
Resistance
Sometimes you want to slow electrons down. That's what resistance does.
Lesson 45 min
A complete loop
Electrons need a path back home. That's a circuit.
The parts in your toolbox
Resistor, LED, switch, capacitor, sensor, microcontroller.
Lesson 57 min
The mighty resistor
A small striped tube whose only job is to slow electrons down.
Lesson 66 min
The LED, our tiny light
Light Emitting Diode — only goes one way, glows when it does.
Lesson 75 min
Switches and buttons
They open and close the loop, on purpose.
Lesson 86 min
Capacitors, the tiny batteries
They hold electricity for a very short time, then release it.
Lesson 96 min
Sensors — circuits that feel the world
Resistors that change their value based on what's happening around them.
Lesson 107 min
Microcontrollers — the brains
A tiny computer that runs your code and controls every other part.
Putting it together
Breadboards, series vs parallel, schematics.
Lesson 116 min
The breadboard, your workbench
A plastic block of holes that lets you try a circuit without soldering.
Lesson 127 min
Series vs parallel
Two ways to wire two parts. They behave very differently.
Lesson 136 min
Reading a schematic
A schematic is a circuit drawn with symbols instead of pictures.
Staying safe
A short list of rules that keep you (and your battery) happy.