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Okay, what we have here is our electronic circuit, an electronic circuit control

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And what we want to control is this component, it's called a LED, a diode

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And to control this LED what we have is a push button

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And as well we have a resistor to protect the LED against overcurrent. So how when too much current goes through the LED it can damage the LED.

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Ok, let's see the circuit, the electric circuit

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Here we have the battery

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We have two batteries, they are connected in series

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The positive terminal of one of them is connected to the negative one of the other

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And so this is the positive terminal of this battery

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The current goes out of this battery through this wire, goes through this wire, passes through the LED, through the resistor

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And when we push the button, the current passes as well through this wire and comes back to this battery

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So, if we want to have current in this circuit, we need to push this button

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And so, when the current goes through the LED, the LED lights up

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We have here the simulator

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We have the same circuit

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And apart from the electric circuit, we have a voltmeter and an ammeter

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Okay, let's see how it works

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It's the same circuit, it's a bit more complicated to see how the current flows through the circuit

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But let's try it

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This is the positive terminal of the battery

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It goes through this port

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This line is the same line as you can see here

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So the current goes through this, through this, goes through this, enters the ammeter. We have here the ammeter. The ammeter measures the current, goes out of the ammeter, goes here.

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This is the same point, the same line, so passes through the LED, passes through the resistor, okay, now this is the same line, goes through this wire

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and when we have here when we have the push button here pressed goes through

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the push button and follows this line and comes back to the battery through

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its negative terminal now I'm going to start the simulation of this circuit

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okay so now we are not pressing we are not pushing the bottom so no current goes

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through the circuit okay and across the LED we only have 88 millivolts when we

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push the bottom current goes through the circuit as we explained and the voltage

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drop across the LED is 2.16 volts

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and the LED is lighting up as you can see here

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if I stop pressing, no current, no light

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I stop the simulation and that is everything