1. Basic Electronics
Year 10

2. Electricity - What is it?
Electronics is all about controlling electricity through wires, devices and components
Electricity flows around a Circuit

3. Dangers of electricity
Never put wet hands or equipment near an electrical switch
Never overload sockets

4. Safety
Never put metal objects near electricity

5. Safety
Look out for over head power lines

6. Task
In your books create a poster warning people against the dangers of electricity
Include rules and sketches

7. Components The components that we use in our car are the LED’s LDR
Battery
Switch
Resistors

8. LED’s
Light Emitting Diodes (LED) are very rugged, they last a very long time and they are an optical source
LEDs produce red, green, yellow, or orange light. They are used in a range of products

9. LDR
LDR’s or Light Dependent Resistors are very useful especially in light/dark sensor circuits.
The animation below shows that when the torch is turned on, the resistance of the LDR falls, allowing current to pass through it.

10. Battery
Batteries come in all shapes and sizes. They store electrical charge and as we all know when they are put into an electronic device such as a portable radio, they provide the power.

11. Switch
Basically switches bring contacts together in different ways but they do the same switching job.  

12. Resistors
Resistors determine the flow of current in an electrical circuit. Where there is high resistance in a circuit the flow of current is small,

13. Preset Resistor
Preset resistors are used in circuits when it is necessary to alter the resistance. Dark/light and temperature sensors usually have these components as the preset resistor allows the circuit to be made more or less sensitive