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Hello. In this video tutorial we're

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going to learn how to use a

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buzzer a buzzer or a beeper is

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a device that produces sound the first

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thing we need to know is that

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there is a buzzer here in the

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library of components in spanish it's called

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"Piezo"

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and we're going to click and drag

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this to the protoboard so we're

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going to connect the beeper or buzzer

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to the arduino board and one of

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the connectors is going to be connected

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to the ground and the other one

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to whichever digital pen we want

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so for instance here it has been

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connected to pin twelve

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now to program it let's have a

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look at the code

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so this is the simplest way to

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program the buzzer we have used one

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of the blue output blocks from this

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set here

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and we use the one for "pasador"

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word meaning connector

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and we've connected it to number twelve

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and "tono" is the tone or frequency

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and it's going to be fifty hurts

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and it's going to make sound for

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half of a second and then we

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will wait for one second

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before we start again

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so that's where we have to wait

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but be careful because sound for half

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of a second and waiting for one

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more second does not mean that the

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whole program will last one and a

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half seconds because the moment that we

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start the sound we start the waiting

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to see

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that means that while we're waiting there

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is also sound continuing so here it

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means that we're going to be waiting

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for one second but during this second

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half of it will have sound

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so here we have a square wave

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half of the second is going to

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be sound and the second half will

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be no sound because we're waiting for

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that one second to finishing the

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program

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okay so if we start the simulation

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now let's change the frequency from fifty

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to one hundred hertz

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and try again it sounds different

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because the frequency is higher

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it sounds different because the frequency is

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high now let's try this instead of

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producing sound for half of a second

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let's do it for zero point seven

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seconds

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and that means that seventy percent of

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the time there will be sound during

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the seventy percent of the time we

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are waiting

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so let's produce this sound now again

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can you hear

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can you hear that there's a period

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of time while there's no sound and

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it's shorter than before so there's sound

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four point seven seconds and then no

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sound for point three seconds this is

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the simplest way of programming a buzzer

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but we're going to make the program

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a little more complicated we are going

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to program it using a

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different sequence

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with a loop

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okay so now you can see this

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code this word here means loop this

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is a program we have from before

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the same one and we are going

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to put it inside of the loop

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so there are two drop-down possibilities counting

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upward or downward so we will either

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move up or down

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so the first thing that we need

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is a variable

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this

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this purple ok the name for this

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variable is tono you can name it

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frequency or tone whatever you want so

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with this variable we are controlling the

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frequency we are going to sweep frequencies

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from ten hertz to one hundred and

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thirty hertz and each time it jumps

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by twenty units

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is moving upwards

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okay I will show you an example

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it's first frequency and then hurts

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to the second one is ten plus

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twenty so thirty thirty plus twenty is

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fifty then fifty plus twenty seventy then

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ninety one hundred ten and one hundred

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thirty is the last one so each

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time we jump we're adding twenty units

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according to the program and this is

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the meaning of twenty here and

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we're starting with ten and ending with

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one thirty

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here we have the variable we are

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going to use to store the numbers

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and tier having upwards means that the

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numbers will get higher or count up

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we could also choose to move downwards

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but in that way we will start

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with one thirty and finish at ten

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okay

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so i think now you can see

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that we have a lot of possibilities

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in this loop it's the same set

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from the previous example that is now

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inside the loop so listen to the

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simulation

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and you will be able to hear

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the frequencies get higher until it loops

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and starts all over again

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okay let's start a simulation

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you are how it's going up getting

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higher

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frequency is getting higher so this second

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program is what you are going to

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reproduce as well as answer two more

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questions below

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good luck