Show HN Daily Selection (2025-05-05)

• Driverless print server for legacy printers, profit goes to open-source
• EZ-TRAK Satellite Hand Tracking Suite
• VoltAgent – Open-Source Observability-First TS AI Agent Framework
• I made a knife steel comparison tool
• I built an AI at 16 that writes full ebooks in minutes (GPT-4)
• Visualizing web server activity using gource
• GoVisual – lightweight, zero-config HTTP request visualizer for Go
• Journelly for iOS: like tweeting but for your eyes only (in plain text)
• A Hacker News-like web system written in Go, works without JavaScript
• I made an AI pixel art generator for game devs
• Generate tests from your JSDoc example to enforce their validity
• I built a Chrome extension to help organize and navigate ChatGPT easily

Driverless print server for legacy printers, profit goes to open-source [Consumer Tech]

30 points, 8 comments

A driverless print server for legacy printers that supports wireless printing from any device and shares profits with open-source projects.

• Supports all major OS (Windows, macOS, Linux, iOS, Android) without requiring drivers
• Compatible with most printers released before 2018
• Profits support CUPS, SANE, and AirSane open-source projects
• Includes open-source and proprietary drivers, with x86 emulation for wider compatibility
• Secure by default with LAN-only operation and IoT security best practices
• Provides technical support and contributes fixes back to open-source projects
• No DIY required, plug-and-play retail device with a simple web interface

Discussion Link, Original Link

EZ-TRAK Satellite Hand Tracking Suite [Consumer Tech]

35 points, 5 comments

EZ-TRAK is a satellite tracking suite for amateur radio and weather satellite enthusiasts, enabling real-time hand tracking with a portable dish antenna.

• Interfaces with EZ-TRAK BLE device for real-time tracking
• Provides azimuth and elevation data for optimal antenna positioning
• Designed for amateur radio, weather satellite enthusiasts, and educational use
• Lightweight, foldable, and portable satellite dish antenna setup

Discussion Link, Original Link

VoltAgent – Open-Source Observability-First TS AI Agent Framework [Developer Tools]

18 points, 2 comments

VoltAgent is an open-source TypeScript framework for building AI agents with a focus on observability and debugging.

• Provides core building blocks like tools, memory management, and state handling, supporting multi-agent setups and LLM agnosticism
• Features a visual debugging console for step-by-step execution tracing, keeping data local while offering workflow clarity
• Designed to bridge the gap between code control and visibility, addressing limitations of no-code tools and traditional frameworks

Discussion Link, Original Link

I made a knife steel comparison tool [Consumer Tech]

3 points, 0 comments

A no-login web app for comparing knife steels by properties like corrosion resistance and edge retention using peer-reviewed data and visual charts.

• Filters 49 steels by corrosion resistance, toughness, edge retention, and ease of sharpening
• Visual comparisons via radar, bar, or scatter plots
• Data sourced from peer-reviewed metallurgy papers and CATRA tests
• Normalized 0-10 scale for easy trade-off analysis
• Built with React, TypeScript, D3, and hosted on Vercel
• No signup, tracking, or login required

Discussion Link, Original Link

I built an AI at 16 that writes full ebooks in minutes (GPT-4) [Text]

5 points, 1 comments

AI tool for generating full ebooks quickly using GPT-4.

• Built by a 16-year-old developer
• Generates complete ebooks in minutes
• Utilizes GPT-4 technology

Discussion Link, Original Link

Visualizing web server activity using gource [Developer Tools]

7 points, 2 comments

Visualizing web server activity using gource to show real-time interactions and admin changes.

• Uses gource to display web server logs in a dynamic, time-based visualization
• Shows payment requests, new member signups, and admin activities
• Simple to implement by converting server logs into gource-compatible format
• Provides an engaging way to monitor low-traffic server activity

Discussion Link

GoVisual – lightweight, zero-config HTTP request visualizer for Go [Developer Tools]

5 points, 0 comments

GoVisual is a lightweight, zero-config HTTP request visualizer for Go that provides a live dashboard for debugging requests.

• Real-time monitoring via SSE
• Deep inspection of headers, bodies, status, and timing
• Middleware tracing with execution order and durations
• Zero external dependencies, works with standard lib and popular frameworks
• Local development-focused with no setup or config files

Discussion Link, Original Link

Journelly for iOS: like tweeting but for your eyes only (in plain text) [Productivity]

4 points, 0 comments

A private, plain-text journaling app for iOS similar to tweeting but for personal use only.

• Private journaling app
• Plain-text format
• iOS platform
• Personal use only

Discussion Link, Original Link

A Hacker News-like web system written in Go, works without JavaScript [Developer Tools]

3 points, 0 comments

A Hacker News-like web system written in Go that works without JavaScript.

• Simple and intuitive page design
• Functions without JavaScript
• Full server-side rendering
• Uses semantic HTML for better SEO and accessibility
• First backend project by a front-end developer
• Live demo and open-source code available

Discussion Link, Original Link

I made an AI pixel art generator for game devs [Image]

4 points, 1 comments

AI pixel art generator for game devs using OpenAI's GPT-image API and image processing.

• Uses OpenAI's GPT-image API
• Incorporates image processing algorithms
• Includes prompt engineering
• Generates ready-to-use assets
• Still has some limitations

Discussion Link, Original Link

Generate tests from your JSDoc example to enforce their validity [Developer Tools]

3 points, 0 comments

Generate tests from JSDoc example tags to ensure their validity.

• Automatically creates tests from JSDoc examples
• Ensures example code remains valid and up-to-date
• Integrates with existing testing frameworks

Discussion Link, Original Link

I built a Chrome extension to help organize and navigate ChatGPT easily [Productivity]

3 points, 0 comments

Organizes and navigates ChatGPT conversations efficiently in Chrome.

• Helps manage and categorize ChatGPT chats
• Provides easy navigation within conversations
• Chrome extension for seamless integration

Discussion Link, Original Link