Basic Electronics Year 10

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

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

Safety Never put metal objects near electricity

Safety Look out for over head power lines

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

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

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

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.

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.

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

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,

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