Learn Arduino
Sixteen component lessons on the Arduino Uno, with a live code panel, a serial monitor and a schematic view.
Visit Learn ArduinoAbout iynk
iynk is a hardware lab you open in a browser. Every board, module and drone is a hand-inked 3D figure you can turn, open up and operate, wired to lessons, code that really runs, and failures you can trigger on purpose.
How it works
Each figure is a self-contained page drawn with the Colorfigures engine: real 3D bodies in flat light, mid and dark bands with ink outlines. The page talks to the figure through a small message bridge, so pressing a button in the lesson moves the part in the figure and the other way round.
Sketches run in a simulator in your browser on a virtual clock: an Arduino C++ subset with the right integer widths for each chip, a MicroPython subset, and a Verilog subset for the two FPGA boards.
Progress and settings are saved in this browser's local storage. There are no accounts. When this deployment has a database, the labs send anonymous usage counts (a lesson passed, a step built, a fault tried, a lap time) for the live counters and leaderboards, with a random id for this browser and never your name or your code. Turn off “Share anonymous usage counts” in Settings (the gear in the header) to stop them.
The three originals
iynk started as a rebuild of three teaching sites and aims to do everything they do, and more. It reuses their facts, formulas, timings and lessons, writes all of its own code, and fixes the mistakes it found in them.
Robotics Engineer
Thirteen interactive benches: boards, motor drivers, sensors and power stages, with a build flow, faults and quizzes.
Visit Robotics EngineerDrone Engineer
Thirteen drones with part-by-part builds, live calculations, safety tests and a flying range.
Visit Drone Engineer
Built with
Next.js, React and Tailwind CSS (all MIT licensed), plus the Colorfigures engine for every figure.
Licences
The figures are drawn with Colorfigures by April Zhu, the engine the Robotics Engineer and Drone Engineer sites are drawn with too. Colorfigures builds on ISO-GLOW by April Zhu and iso-figure by Tolga Cohce, and is released under the MIT licence below.
Licences · MIT
MIT License
Copyright (c) 2026 April Zhu (Colorfigures: colour, hand-drawn style, 3D props, template, examples)
Copyright (c) 2026 April Zhu (iso-glow, on which Colorfigures is based)
Copyright (c) 2026 Tolga Cohce (iso-figure, on which iso-glow is based)
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.The licence is reproduced in its original English.