How to build an electric bike from scratch?

Building an electric bike from scratch is a highly technical process that requires extensive knowledge in electrical wiring, mechanics, and metal works. Some of the basic steps include choosing a bicycle frame that supports electric bike conversion, selecting a motor, battery, and controller, routing cables and wires, mounting the motor and battery on the bicycle frame, and calibrating the system. The choice of components like motor power, battery capacity, frame materials, and other parameters can vary based on the desired use case, terrain, and rider preference. It's recommended to work with an expert in the field or a reputable electric bike conversion kit that provides step-by-step guidance and support to ensure safety and performance.