Eli5 : After seing the meme of a guy going back in time and unable to answer to the question “how is this so-called electricity made?”, I’m actually really asking myself the question.
In: Engineering
There are a bunch of ways. Silicon-based semiconductors will be quite beyond a medieval peasant so getting it from light is out. Mechanical is dead simple tho, get a magnet, get a metal wire, move one across the other fast, BAM you induced voltage. If you cover the wire in insulator (paper, wax infused thin cloth, etc. work fine) and make a tightly wound coil, the effectiveness of the generator skyrockets. Do whatever for energy source, steam machine, water wheel, windmill, a serf running really fast in circles holding a crank. You can also make a chemical battery, only needs two different metals and something acidic to dip them into.
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