Phase 5: Drawing Graphics — Shapes, Scenes, and Animation
Connect counts to coordinates, place neighboring characters, and turn a scene function into a finite animation.
Posts
Articles, lessons, projects, and notes from across the site.
Courses & projects
Follow a sequence of lessons, with explanations, questions, and experiments.
Raspberry Pi Pico WH
Explore microcontrollers, then build and understand an OLED display.
View lessons in orderSwift & SwiftUI
Build Swift types, turn them into an interface, and follow changes through SwiftUI.
View lessons in orderNumPy & Images
Learn to think in arrays, then apply that reasoning to image processing.
View lessons in orderAll posts
PokePlot, Lesson 1: Ask the Pokédex
Read the API docs, turn JSON into Python data, and download three Pokémon pictures. Then complete a few small functions to collect your team.
Phase 4: The Frame Buffer — Draw First, Show Second
Connect raw pixel bytes to drawing methods, keep prepared and displayed images separate, and choose when to send a complete frame.
NumPy: Think in Arrays
Organize data in arrays, transform many values at once, and use masks and axes to answer questions about the data.
Phase 3: Memory Organization — Pages, Bytes, and Coordinates
Explore a tiny Lite-Brite, practice grid-to-list addresses, and trace a pixel into the SSD1306’s page-organized bytes.
Harmonizer for iPad
Harmonizer is an iPad music app for exploring pitch relationships, practicing ear training, and viewing notes or movable-Do syllables.
From Swift Objects to SwiftUI, Part 2: Data Flow and Bindings
Give the pet model one source of truth, split the interface into focused child views, and follow each change through SwiftUI’s data flow.
Phase 2: Pictures as Data — Binary, Hex, and Bit Masks
Build and edit a picture’s smallest pieces: bits and bytes. Explore binary and hex in an interactive byte-building game.
From Swift Objects to SwiftUI
Turn the object-type ideas from the previous Swift lesson into a small interface with composed views, buttons, modifiers, and local state.
Taiwan Mandarin Videos with Subtitles
A list of 326 Taiwan Mandarin videos with subtitles, collected in one place because YouTube restricts playlists for kids’ content.
Why I Recommend Alcumus for Math Practice
Why I recommend AoPS Alcumus as a free way to practice math and become a better problem solver.
Phase 1: Meet the OLED — Pixels, Coordinates, and show()
Put your own message on an OLED, explore a magnified pixel grid, and learn the roles of the display object, I2C connection, driver, and show().
Object Types: Building Things with State and Behavior
Build a small virtual-pet model while learning how Swift types hold state, define behavior, and create valid instances.
Brightening and Averaging Images with NumPy
A question-and-answer introduction to safe image arithmetic, vectorization, clipping, stacking, axes, and image averages with NumPy.
Intro to ML With Python
Get started with Python and Machine Learning with a fantastic, free, online coures.
Deadly Snowflakes: A Scratch Project
My Deadly Snowflakes game, plus beginner-friendly places to start with Scratch and WeScheme.
The Hungry Philosophers Problem
Cool puzzle related to synchronization issues in concurrent programming.
Project 1: The Pico OLED Display
The first Pico project: find the prerequisites, supplies, wiring, and lesson roadmap for learning an OLED from its first pixels to a small driver.
Raspberry Pi Pico WH
Explore what a microcontroller can do, get to know the Pico WH and its pins, and find a growing collection of projects—beginning with an OLED display.
Waabl
a rarely updated and poorly organized account of my progress on my first iOS app