Sparkshed — Browser-Native Electronics SimulatorSparkshed is a browser-native circuit design and simulation tool for learners, makers, and software engineers. Users type what they want to build in plain English, and AI proposes a catalog-grounded design with real firmware simulation (Arduino Uno / ATmega328P) and analog co-simulation (ngspice WASM). Every simulation result carries honest fidelity labels and unknown badges.Core features include: AI-powered circuit design from plain English, real AVR firmware simulation, analog co-simulation, breadboard/schematic/code views, parts catalog with real manufacturer part numbers, BOM export with live pricing, KiCad netlist and PlatformIO firmware export, enclosure STL and GLB (AR) generation, gamified learning with quests, offline-capable PWA, and WCAG 2.2 AA accessibility.Pricing: Free for unlimited learning and simulation. Pro tier (~$8-15/mo) for AI quota and advanced features. Education tier (~$3/seat/yr) for classroom management.Developer Resources

llms.txt — Product context for AI assistants

llms-full.txt — Full product context

ai-info.md — AI-readable product facts

OpenAPI specification — REST API documentation

Agent instructions — When to use Sparkshed

Pages

About — About Sparkshed

Contact — Get in touch

Bench Evidence — Simulation accuracy data

Sparkshed works on Chromebooks, runs offline, and is WCAG 2.2 AA accessible. It is designed for the education channel (ADA Title II, EU EAA). For more information, visit sparkshed.dev.