The Perceptron is one of the most important building blocks of modern AI. Building one from scratch helped me to really understand how it - and many aspects of modern AI - actually work.
I will update this post soon, but for now I’d like to simply share three GitHub repos:
- PerceptronViz is a SwiftUI macOS application that visualizes how a Perceptron works: Both the inference and training. It was created entirely by Claude Code and OpenAI Codex.
- PerceptronPlayground is an Xcode Playground that shows how to build and train a Perceptron in pure Swift.
- PerceptronFace is a fun commandline Swift application that re-creates the original Perceptron application from the 1950s: Classifying a photo of a human face as either male or female.
Have fun playing with these and I hope they help you to understand how a Perceptron works.