ESP32-Based Quadcopter.This project is an ESP32-based quadcopter, including a 3D-printable frame, wiring diagrams, and flight control firmware. It communicates via MAVLink over Wi-Fi or ESP-NOW, can be controlled with a USB gamepad, RC transmitter, or smartphone, and offers wireless command-line debugging, Gazebo simulation, and a Python library for autonomous flight.

E-Ink Photo Frame That Identifies Birds by Their Songs.This project is a Raspberry Pi-based smart bird photo frame that captures nearby bird songs with a microphone, identifies bird species using BirdNET-Go, and displays the results as classical illustrations.

Mini Duck Robot.This project is the control system for Microduck, a bipedal duck robot. The robot is about 25 cm tall and weighs 800 grams. It can be remotely controlled via a handheld controller to walk, and supports optional wheels, picking up objects, and self-righting after a fall.

A Ready-to-Use PostgreSQL Distribution.This is an enterprise-grade open-source PostgreSQL distribution that enables one-click deployment of standalone instances or high-availability clusters on Linux. It includes built-in monitoring dashboards, automatic failover, and point-in-time recovery, and provides 12 PG kernels and 500+ extensions.

Building a Digital Typewriter with Raspberry Pi.This project is a dedicated writing device made with a Raspberry Pi, a 5.5-inch screen, and a mechanical keyboard. The author originally created it to solve the problem of helping with sleep aid when writing diaries before bed and avoiding being affected by old diaries, with a cost of about $200.

Running Haskell Code in Jupyter.This project allows you to interactively write and run Haskell code in Jupyter Notebook, supporting all versions of GHC from 8.4 to 9.14. It provides multiple installation methods such as Hackage, source code compilation, Docker, Nix, etc., and can also be experienced through a browser

Lightweight Java IDE Programming Tool.This is a lightweight IDE aimed at Java and Spring Boot developers, with a runtime memory usage of only 300-400 MB, supporting functions such as global search, code jumping, Maven, breakpoint debugging, database management, etc., and applicable to macOS and Windows systems

Cross-Platform Habit-Tracking App.This is an app for cultivating and tracking personal habits. It helps users develop habits more efficiently through daily check-ins. It not only counts consecutive check-in days but also provides a growth curve to quantify long-term persistence. It supports WebDAV multi-platform synchronization, custom colors, and habit grouping, and is applicable to Android, iOS, Windows, macOS, and Linux platforms.

Visual Keyboard New Tab.This project is a browser extension that displays bookmarks using a keyboard layout. It can bind bookmarks and commands to keys, allowing direct access to websites by pressing the corresponding keys in the new tab. It has built-in practical widgets, supports drag-and-drop layout, focus mode, and cloud synchronization, and is compatible with Chrome, Edge, and Firefox.

Open-source Firmware for Xteink E-ink Readers.This is an open-source e-reader firmware that can replace the original system of Xteink X3, X4, and other ESP32-C3 devices. It can be flashed via USB by connecting to a browser. It supports formats like EPUB, TXT, etc., allows customizing fonts, themes, and buttons, and provides features such as dictionary lookup, KOReader progress synchronization, and wireless file transfer via a web interface.