Basic Electrical Circuits Advanced Design Applications Mr. Brooks.

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Presentation transcript:

Basic Electrical Circuits Advanced Design Applications Mr. Brooks

What is electricity?  The movement of electrons through an electrical circuit.

Electrons  Atom has three parts  Proton  Neutron  Electron

Key terms  Current: The flow of electrons through a circuit. The amp is the unit of electrical flow.  Voltage: The electromotive force that pushes electrons through a circuit. The volt is the unit of electromotive force.  Resistance: The opposition to the flow of electrons. The ohm is the unit for the resistance to electrical flow.

Where does electricity come from?  Three main sources:  Occurs naturally  Direct current (Batteries)  Alternating Current (Generators)

Electricity in nature  Lightning  Solar storms  Electric eels  Polar auroras

Direct Current  Direct current is a unidirectional flow of electric current. Electricity flows at a constant, steady rate.  Examples of power sources that use AC are:  Batteries  Solar Cells

Alternating Current  Alternating Current is a flow of electricity that is not constant. In fact the direction of current flow periodically switches direction.  Examples of AC are:  Generators  Home power outlets

Generator  A generator uses magnets Magnets to push electrons through a circuit, much like a pump pushes water through a pipe.

Breadboard  A breadboard is a prototyping device that allows the user to create/experiment with electrical circuits.

Resistors  We will now construct the “resistor” circuit in our electronics labs and answer the following questions in your notes.  What does a resistor do?  How does it work?  What devices use resistors?

Diodes  We will do the “diode” circuit in our electronics labs.  What is a diode?  How does it work?  What devices do you think Use diodes?

LED  We will do the “LED” lab in our electronics lab kits.  What is an LED?  How does it work?  What devices use LEDs?

Capacitor  We will do the “capacitor” activity in our electronics lab kits.  What is a capacitor?  How does it work?  What are some devices that use capacitors?