Hello and welcome.
In this lesson we are going to cover some of the most common components in electronic and electrical
applications.
The first one is the fuse.
As you can see the fuse is a device that limits the amount of carbon that can be drawn by an electric
circuit by opening or blowing or melting when the current exceeds a preset limit.
As you can see it usually comes in this shape it has two metal
pieces and in the middle there is a plastic or glass piece and there is usually a thin copper wire between
these two pieces that combine copper wire all blowing or melt when it faces high current that it can
handle.
This is the symbol for that element and it's one of the most commonly used elements in the input circuit
in any device especially in power circuits.
Next is the bulb bulb is a very common item.
It serves as the load.
It turns the electrical energy into light and you might have one in your room right now.
This is how it looks.
And now we have LED bulbs.
They don't have.
This is an unjust alarm that consumes a lot of energy to convert a current or a trustee into light.
Now we have led it's more power efficient and it doesn't have helium or gas inside it.
This is the electric symbol.
Then we have the power cord all blog.
Usually this would have a line on neutral and an air terminal.
And as you can see here we have a fuse on the line terminal to make sure that you are protecting the
device from high current and that core or blog will have an insulation.
So it's basically a cable.
This is the insulation material.
And here we have three cables or three wires line earth and a neutron they are placed depending on each
of them depending on the name and they comes in different colors usually Brown a blue and yellow for
Earth as you can see brown yellow and blue and they are used everywhere.
And if your devices if you aren't connected to electricity or to our blog you need to use that power
cord or blog to connect it.
So it's used for timber and it connects an appliance or an equipment to the mains electricity supply
via a wall socket or an extension cord.
Next we have switches.
This is how a physical switch will look like and this is the electrical symbol.
These are necessary to turn the electrical circuit on or off.
And we have the connecting wires that comes in many shapes and in circuits.
If you have a dot between two worlds this means that these two wires are connected.
If you have this sign this means that these two wires are not connected and wires are usually used to
create a complete circuit path through which current flow from the source going to the circuit load.
Now what about Transformers.
This is how transformer block and this is the electrical symbol transformers are used for protection
of appliance and equipment connected to AC power supplies.
It can change the electrical voltage or current from one level to another.
So let's say that we have a device that works on twelve volt and we are getting 220 volt from a power
socket a transformer is the device that is going to step down the voltage from 220 to twelve volts.
So this is what it does.
These are the main components in any electric and electronic circuits.
And this is it.
Now what you need to do next is know how to test each of these components.
This is the thing that we are going to cover in the next letter.