1. Electronics
Mr. Sanders
Year 9 Electronics Project
Deliverables today :
Realise the Health and Safety Issues presented within a workshop.
Explanation as to what Electricity is.
Why is Electricity hazardous?
Resistor Colour Wheel
Determine power of Resistors.

2. Electronics
All are to take 10minutes and write down ALL the hazards you can find in the workshop.
I would like at least 10 different hazards.
To accompany the hazards write 10 safety rules for you to constantly refer back to throughout your project.
Feedback……ONE RULE FROM EACH OF YOU.

3. Electronics
What is electricity?
Flow of energy
Secondary Power Source
Electric charge moves from atom to atom
- Protons (+) Electrons (-)

4. Electronics
Electrical Hazards
Human Bodies contain 70% water
Always tries to find the quickest path to the ground
Travel quicker through water than through air
This is called an electric shock
Electric Shocks cause – heart to stop beating, difficulty breathing, muscle contractions, burns, shock.
Why is Higher voltage dangerous?
Found at power stations
Can jump between substations
5metres

5. Audio Amplifier Project
Electronics
Audio Amplifier Project
What you need to know
What are we going to cover?
How are we going to cover it?
Important areas
Homeworks
Homework –
What is a Darlington Pair? Briefly describe their role in a circuit and what they do and how they are formed.

6. Electronics
Resistors
The RESISTOR does just what its name suggests…  
It ‘resists’ the flow of the electricity in the circuit.  
This flow of electricity is called the CURRENT.
What is the role of the resistor in a circuit then?
If the power flowing through the circuit is too much, the resistor will help to protect the component it is attached to. Should this be an LED (BULB) it will prevent it from being blown up. However, too strong a resistor will cause the bulb to be dim as it is resisting too much electrical charge.
How can you tell which resistor to use?

7. Electronics
Open the compasses up to 8cm, then divide into 10 sections using a protractor
Open the compasses up to 6cm, then divide into 10 sections using a protractor
Open the compasses up to 10cm, then divide into 10 sections using a protractor

8. Electronics
Colour each section as follows
1 = Brown
2 = Red
3 = Orange
4 = Yellow
5 = Green
6 = Blue
7 = Purple
8 = Grey
9 = White
0 = Black
Smallest Disc
Brown = 0
Red = 00
Orange = k
Yellow = 0k
Green = 00k
Blue = m
Purple =
Grey =
White =
Black =

9. Electronics

10. Electronics

11. Electronics

12. Electronics