Inside the parts
How the components that built electronics are made, and how they work, with the physics running live: change the voltage, the material, the frequency, and the picture and the numbers change together. Free, no account.
Capacitor ▸
Plates, a dielectric and a field: how MLCCs, electrolytics and film capacitors are made, charging, AC, and why they fail.
Inductor ▸
Turns of copper on a core: the magnetic field, back-EMF, saturation and the spike that kills transistors.
Transformer ▸
Two windings sharing one core: the turns ratio, why it only works on AC, laminations, and why chargers got small.
Resistor ▸
Electrons colliding with a lattice: carbon and metal film, laser trimming, heat, burning, and the colour code.
Diode and LED ▸
The p-n junction: from sand to a wafer, the depletion region, the I–V curve and the colour of light.
Transistor ▸
BJT and MOSFET: the planar process, carriers crossing the base, a channel appearing under the gate, and the half-on heater.
Battery ▸
Lithium ions shuttling between electrodes: coating, winding, formation, sag, charging and thermal runaway.
Each page: what it is, how it’s made, how it works (live), what goes wrong, and how to use it on the lab’s bench, with exam-style questions.