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Hello! In this video tutorial, in this exercise, we are going to learn how to

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use a... how to control a temperature pressure, temperature sensor, I'm sorry,

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with the Arduino board, ok? And the first thing we need is a temperature sensor

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and you will find it in the library, the basic library, where is it? Here,

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temperature. So just click and drag, put it on the protoboard. This sensor temperature

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has three connectors. The first one has to be connected to 5 volts, the third one is

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connected to ground using the black wire and to the ground connector of the Arduino board,

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and the third one, the one in the middle, is the one that is going to be connected to

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analog input, A0 for instance, and this is the one that is going to read the voltage from the sensor and the Arduino board will

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will know the temperature, will read the temperature using this this wire and this voltage, okay?

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So the connection is really really easy as you can see.

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How can we program it? It's really easy too.

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Forget about the second block. The important thing here is the purple one. The purple one is an input,

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It is a specific input for a temperature sensor.

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And the thing we do is leer el sensor de temperatura en el pasador A0.

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It means we read from this connector.

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We can read from A1, A2, A3, A4 or A5.

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We are going to choose A0 just because we want.

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And this is the unit we want to use, degrees, Celsius degrees.

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So the moment we have this block, we can store the reading in a variable called temperature,

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and then we can send it to the monitor series, serial monitor, I'm sorry, using the block

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we have already used in several exercises, okay?

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Really really easy the connection, really really easy the programming.

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Let's have a look at the simulation.

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If I start the simulation, nothing happens apparently, but the reading is here in the

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serial monitor.

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Now this sensor is reading 24 degrees.

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Why?

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Because if we click on it here, on this bar, we can decide what's the temperature outside,

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or what the temperature is outside.

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And 49 here means that the Arduino board will read 49, 76 or 78, it means that the Arduino

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board will read 78, ok?

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So the simulation works.

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Your exercise will be a little bit more complicated, but just a little bit.

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I'm going to show you the program in real life, as usual, as always, I have my Arduino

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over here and I have a sensor here. You can't see it because it's small but

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believe me it's here. And we are reading it. You can see the measure in the

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serial monitor. Now in this room there are 22 degrees, okay? If I touch it

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temperature will rise. It makes sense. 23, 24, okay. It works. My device is working.

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I have had to make a modification because this reading is different.

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If we have a look at the text taken from the computer, this line is different.

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Can you see?

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Temperatura equals minus 40 plus number multiplied by analog read minus 20.

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This line is not the same than this one.

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This is because I have a different temperature sensor, but it's not a big problem because

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if you look for information, for instance here, the sensor I'm using is the LM35-1.

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If I look for information, I will find how to connect it and I will find how to read

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it using the Arduino board, okay?

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So this is the only line I have modified.

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another modification too, because I have added something to control a buzzer.

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The buzzer is here. The buzzer, the speaker, it makes sounds, it makes sound.

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You already know how to program it and if you don't remember, go back to the

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exercise when we use it, okay? It's really easy to do. We have a specific

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output, I want to remind you, here there is a specific output in the library, let's

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go back to the library, Salida, we have a block here, Reproducer Altavoz, okay?

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Using this one and a weight you can control the the buzzer, okay? So let's go

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back to my circuit, the real one, so I have the Arduino board here, the big

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I have my buzzer and I have my temperature here, my temperature sensor,

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okay? And let's have a look how my sensor works. Now we are reading 22. If I touch

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it, temperature will rise. And I have programmed the circuit that if

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temperature is higher than 25, the buzzer, this one, will produce sound. Let's have

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I touch it. 22, 23, 24, 25, 26. Can you hear it? So my circuit is working. If I remove my hand from the device, the moment the temperature becomes lower, it doesn't sound anymore.

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So this is the exercise you have to program using the simulator.

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The simulator, yes.

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It's really easy.

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You only need to click and drag.

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You need to click and drag the buzzer.

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You need to connect it to ground and to one of the digital devices.

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And using this block, the reproducer altavoz,

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and the block that is the weight, okay, remember,

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and adding them here.

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And you will also need the condition, the if block.

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You remember the if block?

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Be if and a temperature.

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So if something happens, then if temperature is higher than 25, for instance, or 50, whatever,

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then the buzzer will produce sound, okay?

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I think it's really, really easy.

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You know all the blocks.

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You already know all the blocks you need, okay?

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And your simulation will work the same way my real circuit has worked, okay?

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So think about it, it's not complicated, and good luck.