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Arduino: random (native speaker) - Contenido educativo
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Hello. In this exercise we are
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going to reuse a previous circuit the
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one that we made with the digital
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input so here we can find all
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the circuits that we've already made and
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we can duplicate whichever we choose for
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instance since we're going to use a
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digital
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input we click on the wheel
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here and then we can duplicate it
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or copy it
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if we wait a second
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then a copy of the circuit will
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appear now in this exercise we're going
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to use almost the same connections we
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are going to use the digital input
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with a button and the pull-down resistor
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and we're going to use LED
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as output but here instead of having
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just one of them we're going to
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use four of them
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so the first thing we need to
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do is make a little bit of
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room so I'm going to click and
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drag the button over and then the
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wire and the pull-down resistor remember that
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this is a ten kilo ohms one
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and I'm going to click and drag
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the input wire
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I'm going to use pin numbers thirteen
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twelve eleven and ten to control the
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four LED so I'm going to
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click and drag the input wire from
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the button to number nine
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and now I'm going to click and
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drag the four LED just by
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adding three more to the one that
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we have
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therefore I will also need three more
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resistors
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and remember all of them are connected
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to the anode the pin that is
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not straight
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now remember for the LED we
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need to change these values to be
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two thousand two hundred and twenty ohms
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because this is the value that we
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need to protect the LED and remember
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that ohms and kilo ohms are not
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the same thing
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so now I'm going to connect the
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LED using the wires and the
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first connection I want is to make
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the four black wires that are connected
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to the ground
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we'll make them all black like always
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and be careful when you draw the
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wires because sometimes you make a mistake
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and you don't realize that you've made
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a mistake so you can just delete
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what
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what you do
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and start over
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okay so now I have a single
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wire and these four wires are connected
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to the ground because of this horizontal
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line you see that the horizontal line
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is connected to the ground through these
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wires and now I need a connection
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from twelve to this one from eleven
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to this one from ten
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to this one and now that I
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have everything I need with all the
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components
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so now I need to program the
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circuit so I'm going to open the
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coding window and we just want to
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modify the program we already have because
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some of the possibilities and ideas are
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the same so I'm not going to
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get rid of all of it
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and again I'm reading the input for
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number nine so instead of reading from
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number twelve now I'm reading from nine
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so we modify that here
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so I have a variable that I
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read from number nine and it's stored
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in this variable so if this variable
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or input is high then something would
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happen here and if the input is
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not high then something else will happen
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down here that will program
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so the first thing we need is
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a random number so if we go
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to the green library about math there
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is a block here related to random
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numbers that allows us to generate one
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from a range now I want a
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random number from ten
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two thirteen because these are our LED
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connector pin numbers so it has
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to be somewhere between these four
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I also realize that there is a
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bar down here so if it looks
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like there's not enough room just click
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and drag this and you can see
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everything
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now there's one more thing I almost
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forgot before we move on is that
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if I have a random number here
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I still need to store it somewhere
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so I'm going to create a new
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variable under variables we can name it
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anything we want but I'm going to
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use output because this random number will
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be
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the output that will make the LED
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shine so just like we did before
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I'm going to define output using this
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random number so output will have a
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random number from ten to thirteen
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okay so what happens if I press
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the button is one of the LED
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these will shine well which one
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it just depends on the random number
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generated
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so I have to check the value
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of the output now to do this
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I'm going to use the comparison block
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again
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we will use the equal sign and
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I want to check the value of
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the output so for instance if output
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equals thirteen then something will happen but
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I also need a block for the
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if so now I'm comparing if the
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output that is the random number equals
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thirteen
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then what will happen will then output
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number thirteen will be high and this
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block will be here inside the first
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if because if the input or the
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one we are reading here is high
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and the output is thirteen then number
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thirteen will shine
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so do you see this and
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then if it generates for a random
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number thirteen the same happens for twelve
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eleven and ten so I will duplicate
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the same code and put it again
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in the subset
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so the second if condition is inside
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the first if condition
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but now instead of comparing with thirteen
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I'm going to compare with twelve and
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now if output equals twelve twelve will
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be high
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then duplicate again for number eleven if
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the output is eleven then eleven will
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be high
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and duplicate again for our last pin
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for number ten
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you see I almost put that in
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the wrong place but this one has
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to be connected to the others so
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now if output equals ten number ten
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is the one that's going to be
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high all of them are here so
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it means if I press the button
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one of these possibilities will be true
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one of these connectors will be high
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and the LED connected to that number
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will shine
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but what happens if the input is
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not high if i'm not pressing the
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button you can probably guess that we
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will have all four LED that
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are low so these are under the
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if not condition so let's add thirteen
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twelve
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eleven and ten
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eleven
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and ten so if I don't press
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the button it means that this condition
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is not true and it will go
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to the if not condition and all
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four will be low and the random
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number has to be here connected to
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these four blocks
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so now everything has been programmed and
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connected properly you see
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so I can start the simulation
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and if I click on the button
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of course nothing happens because I am
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not pressing the button but if I
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am then one of them will shine
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if I release they are off and
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if I press again another one will
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shine you can press it over and
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over but we can't guess which one
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is going to shine because
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as we programmed it to be random
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okay this is the circuit you will
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now connect and program today good luck
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- Idioma/s:
- Autor/es:
- David Gonzalez Arroyo, Alyssa Fantel
- Subido por:
- David G.
- Licencia:
- Reconocimiento - No comercial - Compartir igual
- Visualizaciones:
- 118
- Fecha:
- 30 de enero de 2022 - 21:45
- Visibilidad:
- Público
- Centro:
- IES MARIE CURIE Loeches
- Duración:
- 09′ 22″
- Relación de aspecto:
- 1.78:1
- Resolución:
- 1920x1080 píxeles
- Tamaño:
- 105.44 MBytes
