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Hello and welcome.

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In this lesson we are going to cover some of the most common components in electronic and electrical

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applications.

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The first one is the fuse.

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As you can see the fuse is a device that limits the amount of carbon that can be drawn by an electric

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circuit by opening or blowing or melting when the current exceeds a preset limit.

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As you can see it usually comes in this shape it has two metal

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pieces and in the middle there is a plastic or glass piece and there is usually a thin copper wire between

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these two pieces that combine copper wire all blowing or melt when it faces high current that it can

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handle.

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This is the symbol for that element and it's one of the most commonly used elements in the input circuit

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in any device especially in power circuits.

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Next is the bulb bulb is a very common item.

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It serves as the load.

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It turns the electrical energy into light and you might have one in your room right now.

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This is how it looks.

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And now we have LED bulbs.

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They don't have.

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This is an unjust alarm that consumes a lot of energy to convert a current or a trustee into light.

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Now we have led it's more power efficient and it doesn't have helium or gas inside it.

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This is the electric symbol.

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Then we have the power cord all blog.

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Usually this would have a line on neutral and an air terminal.

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And as you can see here we have a fuse on the line terminal to make sure that you are protecting the

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device from high current and that core or blog will have an insulation.

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So it's basically a cable.

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This is the insulation material.

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And here we have three cables or three wires line earth and a neutron they are placed depending on each

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of them depending on the name and they comes in different colors usually Brown a blue and yellow for

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Earth as you can see brown yellow and blue and they are used everywhere.

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And if your devices if you aren't connected to electricity or to our blog you need to use that power

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cord or blog to connect it.

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So it's used for timber and it connects an appliance or an equipment to the mains electricity supply

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via a wall socket or an extension cord.

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Next we have switches.

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This is how a physical switch will look like and this is the electrical symbol.

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These are necessary to turn the electrical circuit on or off.

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And we have the connecting wires that comes in many shapes and in circuits.

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If you have a dot between two worlds this means that these two wires are connected.

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If you have this sign this means that these two wires are not connected and wires are usually used to

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create a complete circuit path through which current flow from the source going to the circuit load.

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Now what about Transformers.

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This is how transformer block and this is the electrical symbol transformers are used for protection

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of appliance and equipment connected to AC power supplies.

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It can change the electrical voltage or current from one level to another.

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So let's say that we have a device that works on twelve volt and we are getting 220 volt from a power

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socket a transformer is the device that is going to step down the voltage from 220 to twelve volts.

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So this is what it does.

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These are the main components in any electric and electronic circuits.

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And this is it.

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Now what you need to do next is know how to test each of these components.

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This is the thing that we are going to cover in the next letter.