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?