How an electric vehicle and a charger agree on what to do, drawn from the standards: the circuits, the signals on the wire and the messages they exchange.
The ±12 V, 1 kHz signal on every AC plug: how one wire and a few resistors tell the charger what the car wants, and the car how much current it may draw.
One fast-charging session, five protocols: CCS with DIN 70121, ISO 15118-2 and ISO 15118-20, CHAdeMO and China's GB/T. Every message, signal and contactor, from plug-in to unplug.
The DC session as a film in WebGL: every message flies down the cable between car and charger, the insulation test shimmers, contactors light up and power pours in. Switch protocols and watch it again.