A 12-lesson beginner course on the CAN bus, one short film per lesson. Taylor builds a small vehicle-network exhibit and visits his friend Mina at a car research campus: one twisted pair and two states, CANH and CANL, identifiers and message filters, arbitration, bit timing, the frame, the acknowledge slot, bit stuffing, error counts and bus off, the two terminating resistors, length, speed and ground, and what to check when nothing arrives. Built around the TK109 CAN bus transceiver board and an ESP32. Every film has a lesson page with a 3D and VR bench: learn.lonelybinary.com/fundamentals/can The board: learn.lonelybinary.com/p/tk109