Electronics, hands-on
Learn circuits by turning the knobs, not memorising formulas.
Each module has a live 3D circuit with a physics model behind it. Move a slider and you see the current flow change, the LED brighten and the transistor switch, and the maths explains why.
- Modules
- 6
- 6 live
- Learning time
- 1.7h
- self-paced
- Simulation
- 60 fps
- client-side
Learning path
Modules build on each other, but you can start anywhere.
Ohm's Law
See how voltage, current and resistance relate, and how to calculate any one from the other two.
Resistors
Read colour codes, pick preferred values, and work out how much power a resistor can handle.
Diodes & LEDs
Learn why current flows only one way through a diode, and why every LED needs a resistor.
Transistor Control
Use a small base current to switch a much larger collector current, and find out when the transistor saturates.
Capacitors & RC Timing
Watch a capacitor charge and discharge, and see how the RC time constant sets the speed.
Logic from Transistors
Build NOT, NAND and NOR gates from the transistor switches you've already learned.
Beyond circuits
A bonus lab on the most extreme physics there is.
Black holes & white holes
Bend starlight with a spinning black hole, drop an astronaut in and compare their watch with a friend's, and find out why nothing can ever enter a white hole.
Experiment
Every value can be changed, and the simulation solves the circuit again on each frame.
Visualise
Watch current flow in a 3D breadboard view, or switch to the textbook schematic.
Understand
Each lab has lesson tabs for components, circuit behaviour and the maths, with your live numbers.