1. Electricity – what’s it about?
What are Atoms Made Of?
Protons (+)
Neutrons (no charge)
Electrons (-)

2. Electrons want to be with protons (opposites attract)
Electrons will move when there are not enough protons to “go around”
Electricity flows from areas which are negative to areas which are positive

3. Electronics--Basics
I. Electricity is caused by the movement of electrons.
A. Electricity flows from negative(-) to positive(+)

4. We can control the flow of electricity if we connect a positive and negative charge with a path for the electrons to flow
This closed path by which we control the flow of electrons is called a circuit.

5. Electronics--Basics
I. Electricity is caused by the movement of electrons.
A. Electricity always flows from negative to positive
B. Electricity must follow a circuit

6. Electricity can be compared to the flow of water in a pipe
water --> electrons
pipe --> wire
“water pressure” --> voltage
The amount of water wanting to flow through the pipe

7. Electronics--Basics
I. Electricity is caused by the movement of electrons.
A. Electricity always flows from negative to positive
B. Electricity must follow a circuit
II. 3 Elements of a Circuit
A. Voltage--Amount of electrical force applied to a circuit

8. Electricity can be compared to the flow of water in a pipe
water --> electrons
pipe --> wire
“speed of water” --> current
The number of water molecules that pass a given point in a given time

9. Electronics--Basics
I. Electricity is caused by the movement of electrons.
A. Electricity always flows from negative to positive
B. Electricity must follow a circuit
II. Three Fundamental Elements of a Circuit
A. Voltage--Amount of electrical force applied to a circuit
B. Current--Number of electrons which pass a point over a given time

10. Electricity can be compared to the flow of water in a pipe
water --> electrons
pipe --> wire
“kink in hose” --> resistance
Twisting a hose causes the water to “slow down”

11. Electronics--Basics
I. Electricity is caused by the movement of electrons.
A. Electricity always flows from negative to positive
B. Electricity must follow a circuit
II. Three Fundamental Elements of a Circuit
A. Voltage--Amount of electrical force applied to a circuit
B. Current-- Number of electrons which pass a point over a given time
C. Resistance--Anything that slows down the flow of electricity

12. Four Basic Parts
Of A Basic Circuit

13. Voltage Source
Provides the “build up” of electrons--just waiting to take off
Path
Path for Electricity to Flow

14. Electronics--Basics
I. Electricity is caused by the movement of electrons.
A. Electricity always flows from negative to positive
B. Electricity must follow a circuit
II. Three Fundamental Elements of a Circuit
A. Voltage--The amount of electrical force applied to a circuit
B. Current-- The number of electrons which pass a point over a given time
C. Resistance--Anything that slows down the flow of electricity
III. Four Basic parts of a circuit
A. Power Source
B. Path for electricity to flow

15. Resistor
By slowing down the flow of electricity, it changes electrical energy into other forms of energy
Switch
This controls the flow of electricity by breaking the circuit and cutting off the electron path

16. Electronics--Basics
I. Electricity is caused by the movement of electrons.
A. Electricity always flows from negative to positive
B. Electricity must follow a circuit
II. Three Fundamental Elements of a Circuit
A. Voltage--The amount of electrical force applied to a circuit
B. Current-- The number of electrons which pass a point over a given time
C. Resistance--Anything that slows down the flow of electricity
III. Four Basic parts of a circuit
A. Power Source
B. Path for electricity to flow
C. Resistance (Consuming Device)
D. Switch

17. Some electronic components
Resistor – slows down flow
Potentiometer – a resistor you can change the value of
Capacitor – stores energy
Photocell- changes resistance based on the amount of light