WEBVTT

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We now have the LGBT and the pushbutton in our circuit.

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Let's now add a buzzer so we can make some sound so the buzzer can also be named sometime piezo.

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Okay, so you take your buzzer and you just plug it, for example, here and well, you have two pins,

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a positive and a negative.

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So you just put it there.

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You just plug the negative to the ground.

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Is like that and you plug the positive directly to a digital pin.

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Let's use here the digital PIN number eight, which is available.

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And let's take, for example, yellow color.

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Okay, You don't need any resistor here.

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And you.

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So that's very basic.

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Okay.

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You just plug the negative to the ground and the positive to a digital pin.

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It doesn't matter which one.

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Okay.

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You don't need to have for the buzzer.

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And here is the secret with the buzzer.

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So, of course, make sure you disconnect and you power off the Arduino.

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You can see I have the buzzer here.

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And so one important thing you can see, you should have a passive buzzer.

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How to know this is a passive.

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Well, if you look at the back, you should see the PCB like this.

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It should be green or something similar.

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If it's completely black, it means you have an active buzzer.

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Okay, so here I'm using a passive and I see the PCB.

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You can see I have a minus and a plus.

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You have the plus here.

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So the plus is the positive side.

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So I'm just going to plug it back here.

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And so you have the negative side connected to the line here, the ground line and the positive, which

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is connected to digital PIN number eight here on the Arduino.