Getting Started

                                                                                                                                                                                                                                       don't like listening its all here Electronics is the study of systems that control, electrical energy and communication systems. All licensed electricians should have a basic understanding of modern electronics as a base to expand upon as the working situation demands.
History of the IBEW
Electronics at work

Control - regulation of motor, heating, lighting, feedback systems
Communication - fire alarm, audio, wireless systems, computers, smart homes

Historical Development of Electricity
- electronic theory has long history

Chinese discover magnetism - used lodestone suspended on silk   as a compass


The word magnet comes from Magnesia Greece where myth has it that an enemy ship was lured to the lodestone bearing cliffs and the nails were ripped form the planks sinking the boat.


Early Greeks  generate static electricity from amber            
(amber = elektron) translates forward to electron


Electrician was a title for a magician that performed electrical magic tricks.

European/American science develop electrical theory as a science


American 20th century industrial/military/space complex electronics fuels the 2nd industrial revolution further power generation and semiconductor advances , miniaturization,  robotics-electrical power generation - motors - lights - radio - recording - TV -  consumer devices - computers - optoelectronics - Internet- smart weapons

Benjamin Franklin on the $100 US BANKNOTE - Benjamins

- Photo Electric Energy / Semiconductor Lighting / Bioelectronics / Energy Conservation/Information everywhere , Smart Homes,  Singularity
Electricians will be there constructing and maintaining power and information infrastructures

What is electrical phenomena?

Electrical energy is transduced into other desired forms of energy at a load

3 basic load types



heater elements


transmission lines



SWITCHES   types of switches
Basic Circuit
Voltage Source Conductor Load Control
where one type of energy is converted into electrical energy

Chemical, Photo cells
current pathway to load

wires cables
bus duct
printed circuit board

copper, aluminum, gold
site of energy transduction from electrical to another form of energy

motor - kinetic E
LED - photon E
resistor - heat E
radio transmitter - electromagnetic E
controls electron flow

digital circuits
OPEN - no current flows
CLOSED - current flows
SHORT CIRCUIT - all resistance has been dropped from from the circuit with source voltage applied resulting in MASSIVE current flow
- a fuse or breaker blows or worse a wire begins to glow red hot possibly igniting a fire or blowing up a panel 
OPEN CIRCUIT - infinite resistance is applied to a circuit when a switch opens a cable is cut, a load drops out or a fuse or breaker blows after a short.

- a capacitor opens a circuit after its Time cycle (T) - fully charged

 next Ohm's Law >