🎮
Mini Games
Open the game hub and pick a quick break game.
🧰
Toolbox
Open dedicated pages for encoder, JWT, regex, color, and hash tools.
📹
Live Call
Open the voice and video call page for direct real-time communication.
📄
PDF Converter
Convert PDF files to Markdown, HTML, JSON, or text with image extraction options.
🔓
PDF Unlock
Remove password protection from a PDF locally in your browser without uploading files.
📟
OLED/LCD Bitmap Tool
Convert image or text to monochrome bitmap arrays for embedded displays.
🎛️
Filter Designer
Design LP/HP/BP/BS filters and view Bode plots, ladder circuits, and component values.
✨
Constellation Diagram
Visualize I/Q constellation points, symbol mapping, and channel impairments in real time.
👁️
Eye Diagram
Inspect signal integrity with interactive eye opening, jitter, noise, and sampling overlays.
〰️
Pulse Shaping
Explore pulse shaping filters, Nyquist criterion, and ISI impact in time and frequency domains.
🧭
Smith Chart Studio
Interactive Smith chart for impedance mapping, forbidden zones, and constrained paths.
📊
成绩管理
查看全部课程成绩，分学期统计加权均分、算术均分与加权 GPA。
🔖
Web Bookmarks
Curated daily sites and utility pages in one place.
🐙
GitHub
Open project showcase and read detailed repository highlights.
💬
Message Board
Leave a note for yourself, or drop a short message.
🧪
Lab
Try experimental widgets, plugin demos, and network tools.
🛡️
Privacy Snapshot Demo
Frontend-only demo: see what can be collected and how risk is rated.