Electrical - DC Current flow - Basic Electronics - Resistor Value Test - Simple DC Circuits - Types of Switching - Variable Voltages - Ohm's Law - DC Voltage - DC Current - Series/Parallel Resistors - AC Measurements - AC Voltage and Current - AC Theory - RCL Series Circuits - RCL Parallel Circuits - Capacitance - Capacitors - Inductance - Inductors - Impedance - Circuit Theorems - Complex Numbers - DC Power - AC Power - Silicon Controlled Rectifier - Power Supplies - Voltage Regulation - Magnetism - Transformers - Three Phase Systems - Energy Transfer and Cost - SemiConductors - Atomic Structures - Diode Theory - Diode Applications - Transistor Theory - Bipolar Transistor - Transistor Configurations - Active Transistor Circuits - Field Effect Transistors - Mathematics - Number Systems - Number Conversion - Number Types - Roots - Angles and Parallels - Triangle Ratios - Triangle Angles - Percentages - Ratios - Fractions - Vectors - Circle Angles - Laws - Algebra Rules - Algebra - Mathematical Rules - Powers and Indices - Simplifying - Equations - Graphing - Slope and Translation - Curves and Angle Conversion - Personal Finance - Data Analysis - Mechanics - Area - Surface Area and Symmetry - Volume - Compound Measures - Geometry - Motion - computers - Optics - Analogue Multi-meter - Measurement


Electrical Controls

installation builder

kids and parents software

unattended installation windows





Electrical Mechanics and Maths:


Old AJs electrical calculator software saves you time and money! Let the software perform your NEC search for tables and articles, apply them and do all the math. Old AJs is created by electricians...for electricians...with emphasis on simplicity and day-to-day usefulness for electrical contractors, masters and journeymen/apprentices. Check out our free trial version! Old AJs sizes your feeders & services, complete with wire and conduit sizes for single and, if applicable, parallel runs. Size conduit for multiple wire size and insulation. Ohms law and AC calculations of all kinds are available. 

Old AJs Electrical Software:

Design Master Electrical:

Design Master Electrical is an integrated electrical building design calculation and drafting program that runs on top of AutoCAD. Drafting features include light fixture layouts, one line riser diagrams, panel schedules, fully customizable graphics, circuit looping, automatic tick marks, and switching. Calculation features include circuit load totals, breaker sizing, feeder sizing, fault current calculations, voltage drop, and photometrics. 

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