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Hello! Well, it's a good tool which can help you to design and to dimension some electrical circuits to be crocodile eclipse, which is a program of simulation of circuits.

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I think you have already used it in the first episode, but now we are going to study how to use in order to use it to do and resolve some examples and some exercises.

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So the first thing you should do is open Crocodile Eclipse, it can be opened in pictures, sometimes

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it is better when you are beginning to learn symbols, electrical symbols, but I think for

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all of us it is better to start it in symbols directly.

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So as you see, there are a lot of categories of elements of circuits, firstly the batteries.

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This symbol is for a current battery.

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So we choose this symbol, don't care about the value because we can change at the end.

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And after the battery, the other important element is to control, here you can see a

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lot of switches so switches and other kind of things and this is one of the of the most

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most simple to to use it you also have wheelers and other kind of switches

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And now you also have resistance, boob, boozers or even gears and so on.

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So we are going to start with something very simple which can be just only a resistance

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like that, when you have chosen the parts of our circuit we join the part with the cable

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And now we can change the values, for example, you can change the value, 5 volts, or this

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other value.

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Well, this circuit is good, but obviously we want to calculate and measure the magnitudes

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of the circuit there are three which are voltage resistance and the other one obviously is current

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so to calculate the current we can use an amperimeter which is this and if you want to

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to use the amperimeter to calculate you need insert it in the circuit because

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you should connect it in serial so you should insert in the circuit and

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now you obviously has the value of the current if you change the value of the

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resistance, just 1k, 1k for example, the value of recurring increases, as you can

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see, because it's the Ohm's law. Well, but we also use this kind of circuit to

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calculate and to resolve our problems in

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series connection and in parallel

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connection for example I can connect

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other resistance which value can be 3

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for example and I'm going to connect it

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firstly in parallel and secondly in

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So firstly, this amperimeter shows us the value of the total current

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We also can use a cocodile to know the value of the current in each resistance

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So now, as you can see, the sum of 5 mA and 1.67 mA is 6.67

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and as the circuit, the connection, is in parallel, the voltage in each resistance is the same, 5 volts

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So we have solved a problem of the parallel connection just by using this program and without any calculation

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Now, if we want to do more or less the same but in a serial connection, we should connect

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the two resistances in this kind of connection, 3 and 1.

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In this case, the current is the same for both and its value is 1.25, but the voltage

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is the sum of the voltage in each resistance and to know it is very easy because we just

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can use a voltimeter and connect the voltimeter in parallel, which is resistance

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And now we can see that the sum of 125 and 375