John L Errington MSc

John Erringtons Engineering Design Website

Year 2: Electrical Engineering:

Introduction to BADI Engineering Year 2

Simple electrical engineering projects; Project ideas: Tuneable buzzer/ vibrator; Weighing machine (load sensor); Temperature measurement; Current meter (electromagnetic); Current meter (hot wire); Electric generator; Electric Motor; Battery; Electric Clock; Barograph or seismograph


Why do we need to know about electricity?
Basic electric circuit theory 1: Charge, Current, Voltage, Resistance; Power
Capacitance, Polarized Capacitors, Non-polarized capacitors
Inductance. Important equations; Kirchoff's laws; Kirchoff's laws applied; Demonstration of Kirchoffs laws
Applications; Power supply; 5V power supply showing waveforms; Wire gauges; Getting rid of heat

Safety in electrical systems

Electricity is dangerous; Supply connections and Earths; Three phase electricity distribution; Insulation, Earths, Fuses and Circuit Breakers; 1: Insulation protects people; 2: Fuses protect equipment; 3: Earths protect people .. If they are correctly wired!; Circuit breakers (MCB's and RCCB's) RCCB's or RCD's; Shock hazards; Electric shock; Current paths through your body; Patient / operator safety; Electrical safety outdoors


Coils, Motors, Generators and Transformers; History of developments in electromagnetism; Michael Faraday; George Clerk Maxwell; Conductors carrying current generate a magnetic field.; Electromagnets; Magnetic field of a coil of wire; Basic circuit; Inductance of coil; Permeability; Permeability of common materials; Horseshoe electromagnet; Relay, contactor, or buzzer; Vibration annunciator; Motor; DC Machines (Motors & Generators); Generator DC; Generators DC (other types); AC Generator (Alternator); Transformer; Transformer example

Electronic Components

Passive components; * Active components *; Resistor colour code; Capacitor codes; Diodes; Rectifiers; Transistors; Thyristors (SCR's)

Advanced Engineering materials

Types of Materials; Metals and Alloys; Polymers; Ceramics; Microstructure of ceramics; Properties of ceramics; Organic materials; Wood; Composites
Types of stress; Tensile strength and tensile modulus; Three main groups of engineering composites; Polymer matrix composites; PMC Bulk material; Reinforcement
Crack propagation in bulk reinforcement material; Crack propagation in fiber reinforcement material; Matrix and reinforcement combined; Properties of PMC's;
Metal matrix composites; Ceramic matrix composites; Super hard coatings; Nanostructured materials; Fullerenes: Molecular structures of carbon; Fullerene structures; Applications of fullerenes; Carbon nanotubes; Aerogels; Aerogels as insulators; Facts about aerogels; Applications of aerogels

Assessment of project