O

open-hardware

USB‑C, hand‑solder desk toy that flashes an LED when it hears a sharp sound — a mic front‑end and a 555 timer fire a ~2.4 second "lightning flash."

A USB‑C powered, hand‑solder Morse code learning tool — taps on the capacitive touch pad like a telegraph key; an ATtiny85 decodes the dots and dashes, sounds them on the buzzer, and shows the message on a 5x7 LED matrix via the MAX7219.

USB‑C, hand‑solder desk toy that rolls two six‑sided dice — an ATtiny85 watches a light sensor and shows the result on a 12‑LED bar display.

USB‑C, hand‑solder countdown toy — an ATtiny84 drives a single 7‑segment digit and a piezo buzzer through a rocket‑launch countdown.

VeritasVote is an open-source, tamper-evident in-person voting machine. Fully auditable, cryptographically verifiable, and backed by paper ballots, it provides transparent and secure elections. Hardware and software are fully open for inspection, ensuring every vote can be trusted. https://roxanneardary.com/veritasvote/

OhmPi is an open hardware resistivity meter to provide the scientific community with a robust and flexible tool for monitoring experiments. Documentation: https://ohmpi.org

Aureon is an open modular wearable specification for customizable health-monitoring jewelry built around interchangeable pendant and choker designs. It separates wearable technology from physical and artistic identity, enabling users to customize sensors, electronics, software, controls, safety features, automation, and decorative components while maintaining ownership of their hardware and data. https://roxanneardary.com/aureon/

LocalAI Builder is an open source AI-powered discovery and comparison system that helps users find, evaluate, and select AI models, datasets, specifications, software, hardware, blueprints, machinery, and other resources for locally hosted projects. It compares pricing, licensing, compatibility, skill requirements, and total cost while prioritizing perpetual ownership and practical, user-friendly solutions. https://roxanneardary.com/localai-builder/

Ambientium is an open hardware specification for discovering, evaluating, and developing materials, devices, construction methods, and computational architectures capable of operating at ambient or near-ambient temperatures. It provides a modular, technology-neutral framework for research, simulation, fabrication, patent-aware design exploration, prototyping, and validation, serving as the physical hardware discovery layer for VigilQuantum. https://roxanneardary.com/ambientium/

LocalMind is a modular, locally hosted AI platform specification designed to deliver high-performance AI across diverse hardware. It combines adaptive inference, intelligent workload optimization, evolving knowledge, local memory, open hardware support, and independently upgradeable modules to create a future-ready AI system that can continuously improve without dependence on SaaS AI providers. https://roxanneardary.com/localmind/

Custos is an open-source, modular, AI-powered physical security intelligence platform designed to provide secure, privacy-first infrastructure without vendor lock-in. Built around Zero Trust principles, open identity, edge AI, and resilient offline operation, Custos enables organizations and individuals to deploy intelligent, vendor-neutral security systems while maintaining full ownership of their data, hardware, and future. https://roxanneardary.com/custos/

OpenLimb is an open-source modular robotics platform designed to make robotic limbs, wearable systems, and industrial robotics more accessible, customizable, and transparent. Combining open hardware, AI-assisted engineering, legal AI protection, provenance tracking, and community-driven development, OpenLimb provides a foundation for building the next generation of human-centered and industrial robotic technologies. https://roxanneardary.com/openlimb/

QGuardian Registry is an open-source quantum hardware compatibility layer that standardizes and indexes quantum device capabilities—such as native gate sets, qubit topology, and fidelity metrics—to enable automatic hardware discovery, matching, and integration across the quantum computing ecosystem. https://roxanneardary.com/qguardian-registry/

QGuardian — Fidelity First is an open-source quantum computing platform that ensures reliable and reproducible execution of quantum circuits by automatically matching circuits to compatible hardware, enforcing fidelity thresholds, and reducing errors through native gate awareness and global hardware profiling. https://roxanneardary.com/qguardian/

The Universal Appliance Standard (UAS) is an open-source framework for designing modular, customizable, and energy-efficient appliances. It combines virtual-first CAD design, advanced materials research, AI-assisted sourcing and manufacturing, standardized testing, local production, repairability, and upgradeable components to create appliances that can be built, improved, and maintained anywhere. https://roxanneardary.com/universal-appliance-standard/

AeroGrid is an open source, modular platform for autonomous AI-powered weather drones designed to perform and expand upon the capabilities of traditional weather balloons. Combining reusable high-altitude aircraft, advanced atmospheric sensors, real-time data streaming, and intelligent weather forecasting, AeroGrid creates a distributed network for continuous atmospheric observation, severe weather monitoring, and community-driven meteorological research. https://roxanneardary.com/aerogrid/

ValidationOS is an open-source, local-first AI assurance platform that transforms AI performance into proven results. It provides tools for validating, optimizing, certifying, and monitoring AI models across edge hardware environments through automated testing, compatibility analysis, performance benchmarking, observability, and compliance workflows. https://roxanneardary.com/validationos/

GuardianNX is a modular, AGPL-3.0+ open source home security operating system designed to eliminate vendor lock-in through fully replaceable hardware and software components. It integrates edge AI surveillance, encrypted sensor networks, and autonomous response systems into a unified, privacy-first platform that operates locally by default and remains fully functional without cloud dependency. https://roxanneardary.com/guardiannx/

The AI and the Automobile collection brings together multiple specifications that define how AI integrates into modern vehicle systems, treating the automobile as a software-defined platform where intelligence spans perception, control, navigation, and energy management. It emphasizes real-time performance, safety-critical architecture, and the transition from purely mechanical systems to continuously evolving software-driven mobility. Across the collection, the specs also describe how automotive AI should be built through open and interoperable systems with strong safety practices, including simulation, validation pipelines, and human-in-the-loop oversight to handle edge cases. Together, they frame vehicle intelligence as a layered system combining autonomy, redundancy, diagnostics, and secure update mechanisms to enable reliable and scalable deployment. https://roxanneardary.com/ai-and-the-automobile/

Idea2Reality is an AGPL-3.0+ open-source industrial intelligence platform that transforms ideas into manufacturable hardware and software systems, optimizing across manufacturing, logistics, geography, labor, and cost. It integrates AI-driven design, real-world feasibility analysis, 3D system visualization, workforce and apprenticeship mapping, and continuous memory-based learning to generate end-to-end production and execution plans. https://roxanneardary.com/idea2reality/