Show HN Daily Selection (2025-03-30)
- Physical Pomodoro Timer with ESP32 and e-paper screen
- Appear as anyone in video calls like zoom or Google meets
- Non Interactive ZKP with Fiat-Shamir Heuristic and ECC in Go
- Multi UPS SNMP based shutdown
- Create presentations with smart animations using Excalidraw
- A web app that shows toilets near you
- Java Minecraft on ARM Linux with Vulkan renderer
- Multiplayer TRON Game in Browser
- MongoDB MCP Server
- Personal Time Tracking with Git
- Why Finding the Right Content Tools Is So Hard (and How I Fixed It)
- Ente Photos – v1.0
Physical Pomodoro Timer with ESP32 and e-paper screen [Productivity]
276 points, 63 comments
Physical Pomodoro timer built with ESP32 and e-paper screen.
- Uses ESP32 microcontroller
- Features e-paper display
- Designed for Pomodoro time management
- Physical hardware implementation
Discussion Link, Original Link
Appear as anyone in video calls like zoom or Google meets [Video]
33 points, 21 comments
A free tool that allows users to appear as anyone in video calls using audio-driven portrait animation.
- Uses advanced audio-driven portrait animation technology
- Runs locally on the user's device for complete privacy
- Requires high-performance GPUs (e.g., RTX 4070 or 3080)
- Currently available for Ubuntu systems
- Free to download and test
Discussion Link, Original Link
Non Interactive ZKP with Fiat-Shamir Heuristic and ECC in Go [Developer Tools]
4 points, 0 comments
Non-Interactive Zero-Knowledge Proof implementation using Fiat-Shamir Heuristic and Elliptic Curve Cryptography in Go.
- Uses Fiat-Shamir Heuristic for non-interactive proofs
- Implements Elliptic Curve Cryptography (ECC)
- Written in Go for performance and simplicity
Discussion Link, Original Link
Multi UPS SNMP based shutdown [Developer Tools]
22 points, 13 comments
Multi UPS SNMP based shutdown
- Monitors multiple UPS devices via SNMP
- Automates shutdown processes for power management
Discussion Link, Original Link
Create presentations with smart animations using Excalidraw [Design]
4 points, 0 comments
A fork of Excalidraw that enables creating presentations with smart animations between slides.
- Animates elements between slides for dynamic explanations
- Designed for visualizing algorithms, workflows, and processes
- Forked from Excalidraw for convenience and simplicity
- Includes demo video and detailed instructions
- Available for testing online
Discussion Link, Original Link
A web app that shows toilets near you [Life Assistant]
5 points, 1 comments
A web app that helps users locate nearby toilets in Germany, Austria, and Switzerland.
- Uses OpenStreetMap data via Overpass API
- Cleans and stores data in Supabase DB
- Geocodes missing addresses using Nominatim API
- Interactive map interface for easy navigation
Discussion Link, Original Link
Java Minecraft on ARM Linux with Vulkan renderer [Consumer Tech]
4 points, 1 comments
Java Minecraft running on ARM Linux with Vulkan rendering support.
- ARM Linux compatibility
- Vulkan renderer support
Discussion Link, Original Link
Multiplayer TRON Game in Browser [Entertainment]
7 points, 2 comments
Multiplayer TRON game playable directly in a web browser.
- Real-time multiplayer gameplay
- Browser-based with no downloads required
- Inspired by the classic TRON light cycle battles
Discussion Link, Original Link
MongoDB MCP Server [Developer Tools]
3 points, 1 comments
A Model Context Protocol server that provides access to MongoDB databases for LLMs.
- Enables LLMs to inspect MongoDB collection schemas
- Allows execution of MongoDB operations
- Facilitates interaction between LLMs and MongoDB databases
Discussion Link, Original Link
Personal Time Tracking with Git [Productivity]
16 points, 4 comments
A Git-based tool for tracking personal development time without relying on estimates.
- Uses Git commits and hooks to measure actual time spent on features
- Avoids upfront estimations by focusing on real development data
- Includes a pre-push hook to retain squash commit history
- Open to improvements from Git experts for better implementation
Discussion Link, Original Link
Why Finding the Right Content Tools Is So Hard (and How I Fixed It) [Productivity]
3 points, 0 comments
ContentCreation.tools is a curated directory of high-quality content creation tools designed to simplify the search process.
- No-bullsh*t lists—only high-quality tools
- Budget filters—find free/affordable options easily
- Curated tool stacks—get the right set of tools for specific tasks
Ente Photos – v1.0 [Image]
5 points, 0 comments
Ente Photos is an end-to-end encrypted alternative to Google Photos with a focus on privacy and reliability.
- End-to-end encrypted photo storage
- On-device machine learning for features
- Cryptography audit for security verification
- Fully open-sourced server and client
- Multi-cloud replication for reliability
- Continuous feature development and improvements