ELECTRICAL ENGINEERINGMr. Kerins
ELECTRICAL ENGINEERING Definition- is the
design and construction of electrical and electronic components and devices
21% of all engineers are Electrical
ELECTRICAL ENGINEERING DEGREE REQ’S
Coursework: Electricity Electronics Chemistry Biology Physics High level Math Statistics
IEEE Institute of Electrical
and electronics Engineers
375,000 members
160 Countries
Goal and Purpose; Dedicated to advancing
technological innovation and excellence through their publications, conferences, standards, and activities
ELECTRONIC BASICS Flow of Electrons
Negative to Positive Moving At Speed of
Light (24 x around earth in 1 second)
Schematics are a must
ELECTRONIC BASICS3
Requirements for a complete circuit
SourceLoad Path
TYPES OF ELECTRICAL CIRCUITS
Engineers must weigh unique benefits and drawbacks for each given circuit
Circuits can be designed in three ways:
Series Parallel Series in Parallel
SIMPLE CIRCUITS
Source Load Path
SERIES CIRCUITS Has only ONE path
for electrons/current to flow
Runs through each load back to source
Voltage drop is same among all loads
If path or load is broken will not work
PARALLEL CIRCUITS Have multiple paths
and more than one load.
Voltage across each path is equal to source voltage
PARALLEL VS SERIES CIRCUITS
SOLDERING A must for
electronics
A fusion of allows which have a low melting point
Makes Connections Permanent and electrons flow
Allow Combination of two or more metals
SOLDER Definition:-
combination of lead and tin in various ratios 60/40 solder Avoid acid core
solder Used in electronics
and plumbing Low melting point
among metals – 375degrees F(avg)
SOLDER SAFETY Wear Safety Goggles Avoid contact with
skin and eyes Conscience of
soldering iron tip Avoid Fumes-
ventilation Cold Solder Joint Don’t interrupt
someone who is soldering
SOLDERING – PROJECT Wire Strip 5 Wires
and Solder them together safely
OHMS LAW
Relationship between resistance, current, and voltage in electrical circuits.
Extremely important component in electrical engineering
Discovered by German Physicist George Ohm
OHMS LAW
E – Electromotive Force
Amount of pressure causing electrons to flow
Greater the pressure of electrons higher the voltage
Measured in Voltage Could See “E” or “V”
E = I (R)
OHMS LAW
Resistance – Opposition of current flow. Measured in ohms Resistors are used to
limit current flow and divide voltage
Resistor- Color band codes
Variable vs. Fixed Resistors
R = E/I
OHMS LAW
Intensity- Measure of the flow of electrons per unit of time. Also known as
Coulomb, current or intensity
I or A can be used for symbols of intensity
Measured in Amps
I = E/R
OHMS LAW
Power- product of current and voltage Measured in watts
One watt is equal to one volt moving one amp of electricity at one second
P = I(E)
ELECTRICAL ENGINEERING PROJECT
Line following mouse?
Breadboard? Solder Project?