Intro to Electricity and Electronics

The Shocking Truth!

Electrical Systems

• PCM• BCM• Exterior Lights• Interior lights• Power accessories• Heated seats• Radio/ System• Navigation systm.

• Starting• Charging• Backup Alert • GM - Onstar• Ford - Sync • Airbag systems

What is electricity?

• Electricity is the flow of electrons on the valance, outer, shell of an atom.

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Two Types of Electricity?

• Conventional Flow vs. Electron Flow• Conventional Theory: electricity flows from

positive to negative• Electron Theory: Electricity flows from negative

to positive• Blame it on Ben!• For our purpose: Electricity flows out of the

positive terminal of the battery into the negative (ground).

Conductors

• Conductors have one to three electrons in their valance band.

Examples:• Platinum • Copper• Silver • Gold

Insulators

Insulators have eight electrons in their valance band and do not conduct electricity well.

• Plastic • Rubber• Porcelain • Wood• You

Important Terms

Current: • The amount of electricity• Measured in amps• The water in the hose

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Important Terms

Voltage• The force or electrical pressure • The Push

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Important Terms

Resistance: • Opposition to current flow• Measured in Ohms• Your Thumb!

Meet George

• George Ohm• Born 1789• Published book in1827 on electricity • Loved to dance*

http://en.wikipedia.org/wiki/File:Denkmal_Ohm_TU_M%C3%BCnchen.jpg

Ohm’s Law

• Resistance = Voltage divided by Current• Ohms = Volts/Amps • Volts = Amps x Ohms • Amps = Volts/Ohms

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Example of Ohm’s Law

• Automotive Battery Voltage = 12v • Resistance of light bulb = 2 ohms• Amperage = x

Example of Ohm’s Law

• Amps = 7• Resistance =2• Voltage = unknown (x)

Electrical Symbols

Battery

Basic Circuit

Electrical Symbols

Fuse

Basic Circuit

Electrical Symbols

Switch

Basic Circuit

Electrical Symbols

Light Bulb

Basic Circuit

Electrical Symbols

Ground (Earth)

Basic Circuit

Basic Circuit

Series Circuit

Series Circuit

Parallel Circuit

Parallel Circuit