ElectraCore

Electrical learning, calculation, and preliminary design tools with visible working.

Live application · Product inventory · Curriculum matrix

Overview

ElectraCore brings practical electrical calculations, circuit-design checks, reference material, and structured learning into one browser-based workspace. Results show their method and assumptions so they can be checked rather than accepted as a black box.

The current application provides:

• Eight calculators covering Ohm's law, power, voltage drop, resistor networks, LED resistors, power factor, cable sizing, and voltage dividers.
• A connected single- and three-phase design workflow for load current, protective-device selection, derating, thermal capacity, and voltage drop.
• Nine courses containing 280 individually reviewed lessons.
• Nine reference guides with technical diagrams and print-friendly views.
• Device-local learning progress and calculation history.
• Printable calculation and design summaries.

All current learning content is available in open-preview mode. Account synchronization and payment processing are not implemented.

Technology

• Next.js 16
• React 19
• TypeScript
• Tailwind CSS 4
• Node.js test runner

Run locally

npm ci
npm run dev

Open http://localhost:3000.

Verification

npm run verify

The verification pipeline runs ESLint, TypeScript, 52 automated tests, and a production build. Tests cover calculation utilities, circuit sizing, curriculum topology and assessment mappings, access-policy behavior, and defensive progress persistence.

Browser data

ElectraCore stores saved work on the current device. Existing storage contracts remain supported:

• electracore.calc.history.v1
• ec-progress
• ec-completed-{courseSlug}
• electracore.learning.v2

Changes to these contracts require a versioned, non-destructive migration.

Project structure

app/
  calculate/    calculators and saved calculation history
  design/       connected circuit-design workflow
  guides/       reference catalogue and guide pages
  learn/        courses, lessons, assessments, and progress
docs/           product, curriculum, and payment audits
tests/          calculation, curriculum, access, and persistence tests

Safety and scope

ElectraCore is an educational and preliminary-checking aid. It does not replace a competent electrician, engineer, manufacturer instructions, or the regulations applicable to an installation. Verify equipment data, assumptions, calculations, and current local requirements before installation or live work.

Safety-critical and jurisdiction-dependent content remains labelled for professional review where appropriate.