Neural Networks From Zero: From a Single Number to a Billion Parameters
ArchitectureA neural network never sees a word, an image, or a sound — only a list of numbers. Starting from that one fact and a single neuron, this day-zero guide builds the whole machine: how any input becomes numbers, why weights, biases, and activations each exist, how neurons stack into layers and layers into a model, and how to compute a model's size and running cost by hand.