O

open-hardware

Open instrument learning platform: an ESP32-S3 hub lights the notes on any keyboard or guitar, logs every note and scores practice on a self-hosted server.

Open industrial IoT platform for predictive maintenance: four sensor nodes, a FastAPI backend, Isolation Forest anomaly detection and a live Next.js dashboard. Reveal before failure.

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.

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

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."

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.

Electricity as currency: sealed meter pairs mint one token per kWh of net grid export, sign each one post-quantum (ML-DSA), and record it on a public ledger. Python devnet, chip RTL, signer firmware and board design. Apache-2.0 + CERN-OHL-S-2.0.

A desk dial that shows when Libre Space Foundation satellites pass overhead: firmware, simulator, enclosure and production guide.

Analog electromagnetic theremin.

A handmade analog drone synthesizer from Tucumán, Argentina, based on an original drawing by artist Verónica Corrales.

A handmade multisensitive granular synthesizer from Tucumán, Argentina.

Open Hardware Loom (GER: Webstuhl) - Open Hardware Project

Multifunction Table Licensed Under CERN-OHL-S v2

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/

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/