Challenges

Featured Challenge:
#188 — Voice Chatbot

In this coding challenge, I build a conversational voice chatbot entirely in the browser with p5.js. I combine three pieces: speech-to-text with OpenAI's Whisper model, text-to-speech with Kokoro TTS, and a "brain" for the bot. I also explore the transformers.js pipeline API and the Web Audio API. For the bot's brain, I start with a simple ELIZA-style therapist, then incorporate a RiveScript number-guessing game, and finally a local LLM.

apr 27, 2026

Voice Chatbot

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earthquake data

In this coding challenge, I follow up on the Earthquake Data Visualization challenge and create a 3D version in Processing(Java) using spherical coordinates. I also discuss some 3D vector math including the cross product.

3D Earthquake Data Visualization

In this coding challenge, I visualize earthquake data from the USGS by mapping the latitude, longitude and the magnitude of earthquakes with p5.js. The map imagery is pulled from mapbox and the math demonstrated converts latitude, longitude to x,y via Web Mercator.

Mapping Earthquake Data