Best-in-Class Tools
A curated set of references, standards bodies, suppliers, and learning tools — gathered from the field and the classroom to help electricians, apprentices, and instructors find the hard-to-find stuff faster.
48 web references and 22 apps, organized by category. Filter below or browse the full set.
Online NEC exam prep with 3,000+ practice questions, state-specific question banks, and licensing exam courses for journeyman, master, and contractor.
02Electronics supplier and learning hub for microcontrollers, sensors, and kits.
03Free electronics textbooks, calculators, videos, and technical articles.
04Solar and off-grid energy retailer with educational material on PV modules and batteries.
05AutoCAD, Revit, Fusion, and BIM workflows for construction and engineering.
06PDF markup, plan review, collaboration, and takeoff platform for construction.
07Electrical safety training focused on arc flash, NFPA 70E, and shock hazards.
08California grid operations, electricity markets, and transmission planning.
09Level 2 EV charging equipment; EVSE branch-circuit sizing.
10Video lessons on transformers, taps, current, and power relationships.
11Electronic component distributor with data sheets, calculators, and reference designs.
12Power distribution, circuit protection, controls, backup power, and EV charging equipment.
13Entertaining electrical engineering demonstrations explaining circuits and safety.
14DIY electronics projects, tutorials, component guides, and maker resources.
15Reference and calculation toolkit: formulas, component info, conversions.
16Education-focused electronics site for AC circuits, digital electronics, and semiconductors.
17Federal energy information for efficiency, renewable energy, and grid modernization.
18California energy-code training, Title 24 compliance forms and tools.
19Visual engineering tutorials covering electrical, HVAC, controls, and mechanical systems.
20Solar microinverter, battery, monitoring, and home energy technology.
21Interactive online/mobile circuit simulator with animated voltage and current.
22Electric vehicle conversion parts: motors, controllers, batteries, drivetrain.
23Test and measurement equipment: meters, thermal tools, calibration, application notes.
24Media covering EVs, clean energy, charging infrastructure, and electrification.
25Community project site with DIY, electronics, robotics, and coding tutorials.
26PV racking and mounting systems with engineering resources and installation guides.
27Electrical continuing education, license-renewal, and exam-prep provider.
28DIY battery, solar, and EV project resource; reused lithium battery modules.
29Engineering and maker resource: motors, machines, fabrication, robotics.
30Game-based quiz and polling platform for classroom review.
31Free math, science, computing, and test-prep lessons.
32Block and text-based coding for microcontrollers, games, and robotics.
33Navy mobile-utility and critical-power support equipment, technical support, and training.
34Electrical manufacturers association: standards for enclosures, wiring devices, motors.
35National Fire Protection Association: NEC, NFPA 70E, fire and electrical safety standards.
36Certification organization for fire alarm systems and electrical power testing.
37Federal research, tools, and data for renewable energy and efficiency.
38Tutorial resource: algebra, physics, unit conversions for electrical calculations.
39CU Boulder interactive simulations for circuits, charge, fields, and energy.
40Single-board computers and educational platform for coding and electronics.
41Electrical equipment: switchgear, drives, building automation, energy management.
42Solar savings and system size estimator tool for homeowners and installers.
43Electronics retailer and maker education hub for components, kits, and tutorials.
44Open standards for smart energy: inverters, storage, EV charging interoperability.
45Web development reference and tutorials for HTML, CSS, JavaScript.
46DIY solar and off-grid power resource with beginner-friendly diagrams.
47Solar and energy-storage technical training: design, code, standards, field practice.
48Engineering and maker education videos explaining components and mechanisms.
01AR electronics learning kit for visualizing and building circuits.
02HVAC, psychrometrics, refrigerants, and building systems tools.
03NEC-based calculations for conduit, conductors, voltage drop, motors, and more.
04Free graphing calculator for equations, sine waves, power relationships.
05Mobile component search with data sheets and barcode scan.
06iOS wiring and code-reference tool. Confirm the listed code edition before use.
07Thermal-imaging and inspection tools for electrical troubleshooting and predictive maintenance.
08Heat safety tool for jobsite heat index and risk levels.
09Build and control basic ESP8266 and ESP32 connected-device projects.
10Live California grid demand, capacity, reserves, and renewable trends.
11Digital logic design and simulation for gates and truth tables.
12Simple logic-gate simulator for AND, OR, NOT, XOR.
13Circuit and logic-gate puzzle game for introductory electronics learning.
14Step-by-step math tutoring: algebra, physics, engineering basics.
15Sun path, solar position, and shadow estimates for preliminary PV planning.
16Camera-based math help with step-by-step solutions.
17Conduit-bending layouts for offsets, saddles, kicks, 90s, and segmented bends.
18Project management and collaboration: schedules, dashboards, forms.
19Smartphone sound-level and spectrum tool for learning and indicative readings.
203D model platform for printable enclosures, jigs, training aids.
21Open-source download manager with queues, scheduling, and browser integration.
22Smartphone magnetic-field indicator for basic learning and informal screening only.
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External websites, apps, calculators, and software are provided for convenience and educational reference. Verify calculations, code requirements, equipment ratings, safety procedures, and project conditions using the currently adopted codes, manufacturer instructions, and the authority having jurisdiction. Consumer apps and mobile-device sensors are not substitutes for properly rated, calibrated, and professionally used test instruments. Links marked “Third-party APK” point to download marketplaces outside the official app stores.