How to Make an OwlBot: The Bird Intimidator - Part 2: Making Sounds

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so I'm going to turn it on we can see all the lights
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on and then I'm going to wave my
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hand and we hear the owl sounds come out
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welcome to how to make an albot the bird Intimidator this is part two making
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sound we left off in part one by starting off our prototype building
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process by using a peer sensor connected to an Arduino Uno in order to provide
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the functionality for the initial steps of our prototyping process to make this
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guy to be able to detect motion and we program the functionality
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within the Arduino chip uh to detect that motion and then to print out to the
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serial monitor for us whether or not that motion was detected so here in step
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two now we want to add the functionality to be able to play an audio file that uh has owl sound
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stored on it because we're making an ow bot and we want our owl to make some owl
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sounds so the goal for the end of this part of the prototyping process is
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to detect motion and when motion is detected to play owl sounds for us and
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and in order to do that we're going to be using an MP3 player and I'm
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using the DF robot brand MP3
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player this is a newer version this is called the DF Player Pro Mini MP3 player
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and this is what it looks like I'll have some close-up images of it uh shortly
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but here's the box that it came in and you can see there is the part number
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it's dfr 0768 and I'll leave uh the links to get
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yourself one of these if you'd like in the description below and just so you
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know it is an affiliate link so any purchases
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made I suppose that you know there's a benefit for us out of that so anyway we
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are going to be using this uh particular style of MP3 player there is an older
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version an alternative if uh you already have one or prefer to use the the older
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version which is just a little bit cheaper than this one it's I think the other one is like five bucks or so this
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one's about $8 or so but it is the DF
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uh DF player mini and the that
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particular variation uses an SD card in order to store the MP3 file or other audio files
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onto it this newer version of the DF robot DF
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player uh MP3 player uses a uh chip on
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the board here and uh it just directly stores those files onto the board here
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these uh boards are really small they're like 1 in by 1 in so the form factors on
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these are quite small and will work perfectly for when we start putting
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components in our albot later on in the build uh what we'll do is we'll jump
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right into it you can see here that I've already soldered the pins on my MP3
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player when you get these in the Box they come with the header pin but
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they're not soldered on yet and the header pens that they provide uh they're they kind of give you
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extra and we'll have to trim those and then solder them on so for step one of
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the process we'll have to trim them to fit and then for step two we'll solder
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them on and in step two I'll show you a little trick on how to solder header
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pins on these types of little boards like this uh to make it easier to solder
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them on and and to get them straight and uh make it easier to solder on it's just
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a little trick so we'll jump right into those two steps and right
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now okay as I said in part one of this
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build series for the albot project I'm using using the ultimate DIY 3220 Point
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breadboard here to prototype the albot this was made from a previous
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project if you'd like to build your own uh ultimate DIY 3220 point
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breadboard I'll provide all the information to both our website at mbots
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dcom as well as the playlist for the build
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series uh for creating this I'm going to call it 2D that's Tu DIY for
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short uh because that'll save me from having to say the ultimate DIY 3220
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Point breadboard each time I talk about this board so uh also if you don't have this
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or don't care to make your own 2D then you don't have to have one to be
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able to uh try out this project uh you can just use any generic
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830 Point breadboard as I mentioned in part one and on the website or you can
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use uh any other branded 3220 point
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breadboard so let's move on to what we're going to be doing for part two
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here as I said we're going to be uh adding the uh MP3 player to our prototype in
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part one we set up our power uh to the breadboard from our
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9volt battery power supply we also set up uh the ability for the the power to
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be connected to the Arduino later on and then we also had our Arduino and uh
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connect made all the connections from our Pier sensor to the breadboard and to the Arduino so now we're going to be
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adding the MP3 player to our breadboard and making all the necessary
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connections as I mentioned we're using the DF robot DF Player Pro Mini MP3
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player let me get my
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tweezers here's a a closer look at
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it this is the top side and this is the bottom
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side if I can get it to focus that's the
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bottom that's the top and like I
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mentioned this is the newer version this is the DF player pro version and it
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stores the a AIO files directly to the board here on the chip and all you need
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to do is just make a connection from the USB type-c uh Port here and connect it
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to your computer and then you can transfer files directly just by dragging
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and dropping to the driver file of this board on your computer and that's it so there's no SD
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card like the older version of the MP3 player from DF robot it's called the DF
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player mini so you can use the DF player mini if you'd like but for this project
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I'm using the DF Player
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Pro so you can see I've already soldered on the pins to this board when you
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receive it in the Box uh the pins are not pre-soldered for
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you at least they weren't for me so for our first couple of steps we're going to
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have to prep this board by trimming the header pins that you receive in the Box
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because the ones that they give you they kind of give you extra uh pins so we'll
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have to trim those and to get them to fit on the board because there's uh six
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pens on each side of the board here and then uh after we trim them we'll solder
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them to the board and in that'll be in step two so and in
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step two I'll show you a little trick on how to solder these header pins to this board or any other board that you might
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be uh using for this project or any other project that you do in the future
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and the little trick that I'll show you is a real simple trick in order to get header pins like this to fit on straight
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and to make everything easier to put in place or to make it easier to solder
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everything in place so I've already pre-recorded the steps to do that obviously as you can see the again the
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headers are already on here soldered so you can check out that pre-recorded
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video I'll leave it in the description and it's a quick little video that shows
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you those two steps in order to get everything set up for this board to
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place it on our breadboard so step one is trimming the
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header pin step two is talking about the trick to solder the header pin onto the
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board and then step three will be to solder the header pins to the DF Player
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Pro so right now we'll just pick up on step four so after you've watched that uh
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video for steps 1 through three we're now ready to go to step number four
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where we will be seeding the DF Player Pro onto the
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breadboard so in part one we connected the pier sentor to the breadboard into the power rail as we can see here and to
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the Arduino now that we have the DF Player Pro ready we can now seat it onto
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our breadboard and make all the necessary connections that we need to using some jumper wires so where I'm
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deciding to place the DF Player Pro on my breadboard it will be on this side
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or this uh breadboard on this side of the the on this side of 2D and like I
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mentioned on the website for step four I'm going to be placing the left side
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pins the six pin on the left side I'm going to be placing them
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onto points B6 through b11 and then I'm going to place the right side pins
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there's also six of them into points h 6 through h11 so I'll go ahead and line
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them
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up placing the left side pins onto points
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B6 through b11 and the right side pins through points
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H6 through h11 and I'll go ahead and
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bring this up a little closer so we can see a little
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better so I have the left side pin on B6
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through 11 and the right side pins on H 6 through
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11 so now that we have the MP3 player set on our breadboard we can now move on
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to step five where we will be making the connections to the DF Player Pro uh to
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power so to to make those connections I'm going to be using a red jumper
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wire and a black jumper wire and I'm going to start off by
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taking the red jumper wire and I have one here that I have kind of
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bent in shape in order to try to get it to uh be placed where I need it to go so
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I'm going to take the red jumper wire and I want to place one side
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into the VN pin which in this case where I have my DF Player
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Pro in place on the breadboard is going to be at Pin or at Point
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A6 so that's my VN and I place the other end of the jumper wire uh on the
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positive rail of the power supply uh the 5vt supply coming from the Arduino that
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we set up in part one of this prototype build on the
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breadboard next I'm going to take my black jumper wire again I've just taken
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a black a jumper wire in this case it's black and I've bent it into shape to get
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it to go where I need it to and I'm going to place one end of the jumper
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wire at the ground pin or in line with with the ground pin on the DF Player
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Pro and in this case that's at Point
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A7 on the breadboard and I plac the other end of that jumper wire on the
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negative rail of the 5vt uh Supply that we
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established in uh part one of the series so let
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me show a close up of this so we can see what's going on
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here we have the red jumper wire at VN
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and the positive Supply and we have the black jumper wire going to the ground pin of the DF Player Pro and the other
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end going to the negative Supply so that's step five done so next is Step
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six step six we will be connecting the DF player Pros RX and TX pins or its
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receiving and transmission pins now we could connect directly to
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the TX and RX pins of the Arduino but this could cause a potential issue the
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Arduino Uno only has one cereal port and
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those are the RX and TX pins that are right here on the board the arduinos USB
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port and the serial Port are tied together so what this means is that when you're trying to compile code and upload
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it to the Arduino from its USB port here and you have arduino's RX and TX pins
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it's serial Port connected to something else so let's say if we were connecting
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pins directly to the RX and TX pin on the the Arduino board from the RX and TX
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pin on the DF Player Pro we could run into issues when uploading our code we'd
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have to remove the wires on the RX and TX pens here to the serial Port each
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time we need to load the code to the Arduino and then we'd have to replace them back in again uh each time we would
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upload code to the Arduino so we don't want to do that so in order to get
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around this uh this issue is we're going to be
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uh tying into pens two and three on the Arduino instead and then we'll we'll put
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into the code later that we're using pens 2 and three as our RX and TX pin so
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what we'll do is we'll connect the RX and TX pins coming from the DF Player
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Pro and make the connections from those two pins to pin two and three so what we're going to do is we're going to
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connect the r RX pin on the DF Player Pro using a
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jumper wire and connecting the other end of the jumper wire to pin two on the
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Arduino so what we'll do in the code is we'll say that pin two will be our TX
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pin because we need the RX pin from the MP3 player to go to the TX pin that will
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designate as pin two later in the code on the Arduino and similarly we need to make a
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connection using jumper wires from the TX pin of the MP3 player and connect it
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to the RX pin or pin three which we will designate as the RX pin and code later
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on the Arduino so I'm going to be using an orange and blue jumper wire
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these are maleo male jumper wires meaning that there's
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pens on each end of these jumper wires and I'm going to start by using
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the blue jumper wire and I'm going to connect one in of it to point
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A8 and A8 in my case is the RX pin on
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the DF Player Pro MP3 player I'm going to take the other end of this blue
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jumper wire and I'm going to place it into pin in two of the
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Arduino like so next I'm going to take the orange
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jumper wire and place one end of the jumper wire into pin uh into pin three of the
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Arduino so that's the one next to pin two here and I'll take the other end and
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I'll place it at the TX pin of the DF Player Pro
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and that's at Point A9 on my
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breadboard so I'll show you a closeup of what we've got going on so
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far we have the blue jumper wire going from the RX pin of the DF Player
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Pro and going to pin two of the Arduino if I can angle it
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just right it's upside down but you can see it's going to pin two and then I have the orange jumper wire going from
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the TX pin of the DF Player Pro and the other end going to pin three on the
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Arduino and again we'll put into code later that pen two will be the TX pen on
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the Arduino and Pen 3 will be the RX pen on the Arduino and we'll set that all up
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in code later when we update our code from part one of this prototype build
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for the elbot series so now what we need to do is we need to move on to step seven and step seven is loading an MP3
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file onto the DF Player Pro so for that step for step seven I'm going to refer
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you to the website where I explain in detail on how to load an MP3 file onto
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the DF Player Pro and it's very easy to load a file on onto the DF player uh Pro
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Mini MP3 play ler as I mentioned before all you need is some kind of data
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transfer cable that has a USB type c end and the other
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end uh of whatever type USB connection you need to make to your specific computer
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and you'll go to whatever uh website you prefer to go to or whatever sound you
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prefer to use I provide the AL sound I'm using for this project on the website
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I'll leave the description to everything you need down below but whatever file you're going to
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be using I'm using an MP3 file uh you can use different audio files and I'll
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leave a link to DF robots site for this DF player uh Pro Mini MP3 player and
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it'll tell you what types of files you can use but I'm using an MP3 file that has Al sounds on it that I found the
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file at freesound.org all that information will be left in the
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description and on the website but all you need to do is have your MP3 file in
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your folder on your computer and have the folder of the driver file for the
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MP3 player and basically you just drag and drop that file into the the file for
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the DF Player Pro and that's it that file should be ready to go to use you
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can just unplug the USB cable to the MP3
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player and it's got the file set in here and it's ready to go and then later in
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in the process of setting up uh the prototype for sound for step two the
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current uh step that we're on in this build series will put into the code the
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functionality to play that file uh using our Arduino for when motion is detected
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by the pier sensor so assuming that you've gone to the website and followed the instruction for step seven to upload
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the file to the MP3 player and you've already got that set up we're now moving to step 8 where we're going to connect
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the speakers to the DF Player Pro I'm using
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two 3 watt 8 ohm speakers they're just a couple of basic speakers
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and I'm using two because the MP3 player pro has the ability to Output to two
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speakers unlike the older version of the MP3 player from DF robot the DF player
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mini I only had capability of outputting to uh one speaker I believe so I'm using
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two speakers for this project and what we're going to do is we're going to make connections using
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jumper wires to these speakers because these speakers have these jst connectors
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on them and I've already got the jumper wires uh installed in each of these but
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my speakers have these jst connectors on them and for prototyping purposes I'm
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just going to take uh an orange and a yellow jumper wire and I'm going to these are maleo
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male in jumper wires and I'm going to just shove those pins into the holes of the jst connector on these speakers uh
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just to make an easy connection to the breadboard that's all I'm going to do so what I'm going to do is I'm going to
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take an orange jumper wire and place it into the
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hole connecting to the red wire of the speaker that'll
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be my positive and I'll take a yellow jumper wire and place it into the hole
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connecting it to to the black wire of the speaker and that's considered my negative and I I've already done the
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same for this speaker as well I have the orange jumper wire going to the red wire
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and the yellow jumper wire going to the black wire so I have both of my speakers
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ready to connect to the DF Player Pro I'll set that one
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aside and what we'll do is we'll take the other ends of the jumper wires the orange and the yellow wires and we'll
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begin making our connections for the speakers to the MP3 player so what I'm
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going to do is I'm going to take the orange the other end of the orange jumper wire for this speaker it's
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connected to the red wire remember and I'm going to connect it to the r plus
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pin on the MP3 player and for me that is going to be
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pin I9 in my case where based on how I've
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placed the MP3 player on the breadboard so I have the orange jumper wire coming
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from this speaker it's connected to the red wire of the speaker and it's going to the
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r+ pin on the DF Player Pro and it's
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going into pin I9 in my case now I'm going to
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take the other end of the yellow jumper wire and remember
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we have it connected to the black wire on the speaker I'm going to take the other end and connect it to the r
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negative pin on the MP3 player and that happens to be at Point
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I8 so if I bring it closer I can show you what we have so
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far is that we here's the speaker here's the black the red and black wire
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the red wire goes to the orange jumper wire and the orange jumper wire is going
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[Music] to the r+ pin and then the yellow jumper wire is
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connected to the black wire and the other end is connected to the r minus
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pin on the MP3 player so now we're just going to repeat
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this process for the second speaker and here that
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is so I'm going to take the orange jumper wire for this speaker it's
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connect one end is connected to the red wire of the speaker I'm going to take the other end of the orange jumper wire
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and I'm going to place it at the l+ pen
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of the DF Player Pro Mini MP3 player and that happens to be for
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pin 11 or excuse me at Point i1 on my
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breadboard and I'm going to take the yellow jumper wire where we connected
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one end to the black wire of the speaker and I'm going to take the other end of
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that yellow jumper wire and place it at the L minus pin of the DF Player
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Pro and that is is the L minus pin and that happens to be at point I 10 on my
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breadboard so if I bring it closer we can see that
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oops this speaker here that we just connected is connected to points l+ and
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L minus I have the orange jumper wire which is connected to the red wire of
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the speaker and the other end of that orange jumper wires at Point at Pin L
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plus and we have the yellow jumper wire which one end is connected to the black
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wire of the speaker and the other end of the yellow jumper wires connected at the L minus pin of the DF Player Pro Mini
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MP3 player so we have both of our speakers
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connected to the DF Player Pro Mini MP3 player
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and that is it for step
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eight okay once you've already uploaded the MP3 file onto the DF Player Pro MP3
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player and have already connected the speakers to the albot Prototype on the
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breadboard we're now ready to move on to programming the Arduino or updating the
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code in the for the arduin wio that we did from part one of this albot build
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series I already have the website up on
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my browser here and I'm at the page for how to make an albot for part two and
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what I want to do is I want to scroll down to the table of contents here and go to programming the Arduino to make
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sound and that'll take me down here where we can see the code here and what
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I want to do is instead of typing all this by hand I
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would just want to copy it by pressing the copy button and then I'm going to go back to
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the Arduino IDE here you can see that I have it up here on the screen already I've already saved it as albot part two
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you can save it however you like but in keeping with consistency on this build
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series I'm going to have mine uh code code saved in this format
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like this so what I'm going to do is I'm going to select all this and delete it
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and I'm just going to paste the code that I copied from the site right into
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the page here and then now what I'm going to do is I'm just going to
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save and it's ready to go so once I connect my Arduino to my computer
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I can upload it to the Arduino and then we can move on to the next
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step so what we can do now is just kind of go over the code here the new stuff that's in here so what we've added to
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our code from part one of the build of the albot and prototyping the albot
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we've added this new include here the include DF robot df1 1201 S.H
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and this is just for the DF robot DF Player Pro Mini uh MP3 player it's the
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library for it so our MP3 module has its own library that we need to include in
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our code the next thing that I've added here are these two variables here for
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the RX in TX or the receiver and transmission depins on the Arduino
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so the RX here is assigned to pin three on the Arduino so we can see here it
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says this is what we'll designate as the RX pin on the Arduino this is not the RX
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pin for the uh DF Player Pro and similarly this uh TX variable
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that we've assigned to pin 2 here this is what we'll designate as the
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TX pin on the Arduino not the MP3 player
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so next we've created a new uh serial object here the software effects serial
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here we're using software serial and we're passing in the two arguments for
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the variables we just created up here above the RX and TX variables so what we're doing is we're creating an object
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for our sound effect cial which is saying which pins to use for receiving
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and transmission so basically this is what's used to communicate with the DF Player Pro module that we have in our
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current prototype setup so moving moving along we have an instance of an object
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here using the DF robot object here which we've named sound effects player
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and we'll use the sound effects player object when referring to the sound effects player or the MP3 player now we
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want to look down into the setup and here we can see that we've added a couple more pin modes here one for the
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RX and one for the TX the two variables we created up here and we're saying that
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the RX will be an input and the TX will be an output so for the RX we said this
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is the RX pin on the Arduino that's our receiving pin for the Arduino so it
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needs to be an input because it's receiving information and then for the pin mode for the TX this is our
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transmission pin for the Arduino and it needs to be an output pin because it's
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transmitting data out from the Arduino looking at the serial. begin or the
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serial setup that we have here previously we had a b rate here for 9600
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which is the typical B rate that you would use for most instance instances
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but I found that when I initially tried to use the MP3 player and look for for
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uh output to the serial monitor using a 9600 B rate I was getting gibberish
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printed to the serial monitor so I had to look up on DF robots website for the
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DF Player Pro Mini MP3 player to see if I could find if there was a specific B
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rate that I needed to use and I saw in some of their example code on their
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website that they were using a b rate of50 15200 so I added that in my own code and
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ran it again and I was able to get the output that I was looking for to the
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serial monitor so that's why I'm using this B rate of 115200 in order to be
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able to use the serial monitor for debugging purposes moving along we can see that we have an instance of the
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sound effects serial that we created up here where
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we're also using the same B rate value for it and this is just for setting up
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the Cal for sound effects cereal and then here we can see that we are
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basically just telling the sound effects player to use the sound effects serial so remember that uh the sound effect
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serial said which pins to use for the transmission or TX pin and receiving for
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the RX pin for the Arduino so the sound effects play
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refers to the MP3 player so what we're really saying is is that we want the MP3
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player to listen for signals from the Arduino serial Port that we made from pins two and three so pin two on the
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Arduino is the uh TX pin and pin three on the Arduino is the RX pin so now if
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we look down here we're just doing the setup for the player itself the MP3
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player so so these are just some built-in functions from the uh Library
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up from up this Library here and remember we created uh this object here
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called sound effects player from that library and here we're just doing an
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initial setup using the built-in functions from the
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library that we're using so we're saying here sound effects player. setv which is just us set
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setting the volume for the MP3 player and here I've used a value of 30 and I
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think the range goes from 0 to 30 where Zer is the lowest volume setting and 30
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is the highest volume setting here we're calling the switch function and we're
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basically saying that we want the sound effects player to be in music mode next I have the set prompt set to false and
38:24
what this is is that when you initially turn on the MP3 player there's a voice
38:30
prompt that comes on and I didn't want to have that play When the MP3 player is
38:36
powered on so in order to silence the voice prompt at the start we'll just put
38:43
the set prompt to false and then here I have a delay for 2 seconds or 2,000
38:48
milliseconds in order to allow for everything to calibrate and then here
38:54
we're just setting the play mode for the sound effect effect player to uh all
39:00
cycle or we want it to repeat all so in this case we just have one file uh the
39:08
AL sounds MP3 file that we loaded to the MP3 player and it's just going to allow
39:15
that to continually repeat if you had more than one file it would just repeat
39:20
everything uh in your mp3 player so moving on to inside the loop so before
39:27
before we get into the loop I'm going to go back up here to the top of the code so we can look at
39:32
the variables that we initiated back in part one of the albot project and here
39:39
we see that in part one we created this motion status variable and we
39:45
initialized it to be low and we also created this peer State variable also
39:51
initializing it to be low the motion status was for our current motion status
39:56
or signal pin read it's can either be low or high and again we're initializing
40:01
it to be low and the peer State variable is the state of the peer signal pin so
40:07
it's either high or low and initially we set it to low so I just wanted to go over those two real quick in order to
40:15
refresh our memory on those two variables that we created in part
40:20
one and going back down to the loop starting at the motion status
40:28
variable here we're Now setting it equal to a digital read meaning that we're wanting to read the digital pin of the
40:34
pier sensor here and that was pin 12 on the Arduino and then if that motion status
40:41
is high or it's reading a a signal coming from that digital pin then we
40:46
want to go in this if statement and here it's asking uh if the pier state is low
40:51
we want to go in here and we initialize the pier state to be low so in usually
40:57
when the for Loop is or when the code enters the Ford Loop and if there's
41:03
motion being detected by the pin 12 then it's going to go in this if statement
41:09
here because motion status is high and then because we initialized Pier state
41:15
to be low it will go into this if statement it's going to print out that motion was detected to the serial
41:22
Monitor and then we're going to change the state of peer state to high
41:28
and then here we have the if statement uh asking whether or not the sound effects player is playing so here
41:35
it says if the sound effects player is not playing that's what this little
41:41
exclamation mark here is for so if the sound effects player is not playing is
41:47
basically what it's saying then we want to start playing the owl sounds from the
41:52
MP3 player if the motion status uh was still low meaning mean that there wasn't
41:57
any motion detected it wouldn't go in this if statement so it would go to this else statement and here if that Pier
42:06
state was high it would tell us that no motion was detected set the pier state to low and then if the sound effects
42:15
player is playing then we want to pause the ow sound so this would go to the
42:20
pause owl uh function which we created this function we'll take a look at and
42:27
just a minute and we also create this play out function which which we will look at next so as I stated if we if the
42:35
code were to reach this part of the code where it wants to play the owl sounds if
42:40
the sound effects player isn't playing it would jump down to this Play
42:47
Owl function here and this is a function that we create ourselves and I've named it play owl and
42:54
in here we have a variable called file number and here we're getting the current file
43:00
number within the MP3 player and we're setting it to the variable file num each
43:07
file in the MP3 player will have its own value for this project we're only using
43:13
one file and that's the ow sound file that we loaded onto the MP3 player from
43:19
before as I mentioned earlier you could have other files that play other sounds on your mp3 player module so here we're
43:27
again using one of the built-in functions for the DF robot library and
43:35
here we have an argument of one and what we're saying here is is that we want to
43:41
play the first file on the MP3 player and the numbers are arranged according
43:46
to the sequence of files copied onto the udisk on the MP3 player module and then
43:52
here we want to set the play time to zero and what this does is it starts the
43:58
file 0 seconds in or at the very beginning and then we want to start
44:03
playing the sound effects by using the built-in function start so now we come
44:09
to this for Loop here and this is just an easier way for me to have the AL
44:15
sounds play for about 10 seconds so the for Loop saying that uh initially this I
44:22
variable is set equal to 10 and then if I is greater than than zero then each
44:28
time we go into this for Loop we want to decrement this value of I and what we
44:34
want to do is we want to print out to the serial monitor the value of I so initially it's going to print out the
44:40
value of 10 because we initialized I to B1 we want to wait for 1 second and then
44:47
it'll jump back up here to the for loop after it's already decremented the value of I by one so now after the first Loop
44:57
now we're at the value of nine it'll print at it'll print out nine to the
45:02
serial monitor wait a second go back up to the beginning after decrementing the
45:08
value of I so now the value of I is 8 it'll print out the value of 8 to the
45:13
serial monitor wait a second and it'll keep doing this until the value of I is
45:20
no longer greater than zero so once I is at zero it will leave this for Loop
45:27
and this process takes approximately 10 seconds so basically we're just buying
45:33
some time here approximately 10 seconds as I said until we get down to this line
45:40
here where we're calling the pause owl function and the pause owl function here
45:45
is a function that we make I've called it pause owl and in here we're telling the sound effects player that we want to
45:51
pause the player so that's basically all that we've added to
45:57
our previous code from part one of the albot project this is the functionality
46:03
that we have now to be able to use the MP3 player that we've added to our
46:09
prototype so next what we need to do is just compile this code and upload it to the
46:19
Arduino Okay And discussing about compiling and uploading the code to the Arduino once we plug in the the Arduino
46:27
to our computer we of course need to make sure that we uh go up to tools uh I
46:35
know you can't see it on the screen right now but we go up to tools and make
46:40
sure that uh we go down to board and uh Arduino AVR boards and make sure that
46:48
you check the board that you are using in this case for this project we're using the Arduino Uno and then again I
46:56
go up to tools again I'm sorry you can't see it on your screen right now but I go up to tools and then this drop down menu
47:04
uh comes down and then the next we would need to go to Port and then choose the port where your Arduino is located at
47:12
and in this case this is my port for the Arduino Uno and I make sure I check that one and you can see down here at the
47:19
bottom that it shows that the Arduino Uno is uh showing up in in the uh ID
47:28
uh I'm using a MacBook Pro to compile and upload the code right
47:35
now and you may come into a couple of problems if you've never compiled or
47:41
uploaded code from the Arduino IDE to an Arduino before you might run into a
47:47
couple of Errors a couple of different errors so the first error I want to discuss is an error that you might
47:53
receive and I have a I pull up my browser uh you might see an error that
48:00
says something about a bad CPU in executable and right now I'm at
48:07
arduino's uh website and I I search this
48:13
specific uh error that I had received and uh what it may be is these
48:21
uh newer uh Apple MacBook computers that use the Apple silicon instead of the
48:28
Intel CPUs you may need to install what's called Rosetta onto your computer
48:37
and right here on this page on the Arduino website it gives you the
48:42
instructions in this case to manually install Rosetta so all you need to do is
48:48
just open your terminal and then in your terminal you
48:53
would just need to type in this software update D- install D rosetta in my case
49:02
I've already installed this on my uh MacBook Pro so that's already been done
49:08
but all you would do is you just type it into your terminal window and then press enter and then you you'd have to accept
49:16
the license agreement with Apple so basically you'd just uh type in the letter a and hit enter and then wait for
49:22
it to install and finish and then you just close out your terminal window and and then that should fix that particular
49:29
error but you may also run into another error as I did because we're using the DF robot DF
49:38
Player Pro Mini MP3 player for this project we're having to include the DF
49:45
robot Library into our code and if that
49:51
library is not pre-installed on or into the Arduino IDE
49:57
we may receive an error such as this one I did install it before making this
50:04
video but I also uh removed it in order to show you what the error may show if
50:10
you have not installed it and then I'll show you how to install this particular Library so I'm going to
50:17
press the upload error here to upload the code to the
50:22
Arduino and then you can see what I get this error this compilation error that says Uh there's no such file or
50:29
directory for this uh particular library that we're trying to use here for the DF
50:36
robot Library so in order to install it the easiest way is just to go right here to
50:43
where it looks like these stack of books here and if we click on it we can see
50:48
that there's the LI we're in the library manager and in this window here you can see I've already I already have the
50:56
library typed in here so all you do is just type in this window here DF
51:03
robot uncore and we're wanting the DF
51:09
121s so I type in df1 121s and we can see it show up right
51:17
here this is the library that we want this DF robot DF
51:22
121s so all you have to do is just press install it'll install it and then once that's
51:29
done I'm going to go ahead and press this uh book icon again to get that out of the way and then I'll press the
51:37
upload Arrow again we see that it's compiling and uploading to the
51:44
Arduino and it's done uploading so now I don't have an error so if you ended up
51:49
receiving that particular error error so if you ended up receiving those
51:54
particular errors I hope that helps you out and then now we can continue on with
52:00
the rest of this
52:07
project okay I have a little bit closeup shot of everything right here we just
52:14
uploaded the code to the Arduino and right now I plugged in the power uh from
52:20
the 9vt battery supply and I haven't turned it on yet
52:25
because while I'm sitting here trying to talk it would keep going off playing ow sounds but I'm going to hook up the
52:31
power to it I have the pier sensor sitting here and I'll wave my hand in
52:36
front of it once I turn it on that way we can hear uh what it sounds like when
52:43
the owl sounds come out of the speakers here from the MP3 player and we can test out to see if everything works as we
52:50
want it to so I'm going to turn it on we can see all the lights
52:59
on and then I'm going to wave my
53:13
hand and we hear the owl sounds come out now I don't know if you can tell on
53:19
the camera but the audio coming out of the speakers sounds a little bit harsh a
53:27
little bit rough sometimes you can
53:34
hear kind of a crackling or a popping sound it doesn't
53:39
show up too well right now but there's a way that we can improve the sound
53:45
quality on the DF Player Pro and we're going to take that step
53:54
next okay now that we've got our code and we had everything running and we've
54:00
tested it out and everything seems fine and dandy our owl sounds are playing on
54:06
the speakers we may realize that there are some sounds coming from our speakers
54:13
maybe some crackling sounds or vibrations or something and that can be
54:18
kind of an annoyance but for this part I'm trying to move my light around here to get some
54:25
of the glare out of the way but for this part we're going to try to improve the sound quality of the DF
54:30
Player Pro and I've actually already set
54:36
up everything prior to starting to record here uh can you notice any
54:43
differences in the board anything different on the breadboard maybe if I can zoom in here a
54:50
little bit and get my trusty orange pointer
54:56
here what we can do to try to alleviate some of that sound Distortion in the
55:02
speakers is that we can add a 1K ohm or 1,00 Ohm resistor that's a brown black
55:10
red stripe resistor I have one right here and we can set uh one end of its
55:17
terminals at the RX pen and uh then connect the blue wire that we had coming
55:24
from pin two of the Arduino to the RX pin I've just shifted it to the other terminal of the resistor what I'm going
55:31
to do is I'm going to reset the camera so I can bring you in a little bit closer and then I'll explain it a little
55:37
bit better okay I have the camera up a little bit closer now and like I said in
55:43
order to reduce some of the noise to the speakers I've added a 1K Ohm resistor
55:50
here again that's brown black red and where we used to have this blue
55:56
wire this blue jumper wire that's connected to pin or to uh pin two of the
56:05
Arduino it used to run to the RX pin and you can't quite see
56:11
it in the camera but right here where this lead is
56:18
of the resistor that blue jumper wire used to go to this point on the breadboard which which runs in line with
56:25
the RX pin I'll just move this
56:30
orange jumper out of the way but where the resistor is now is
56:35
where the blue jumper wire used to be right at the RX pin now we've moved that
56:43
blue jumper wire to a point up on the res up on the breadboard here that's not
56:51
in line with anything else I happen to have this blue jumper
56:59
wire at Point B2 and I have as I said the
57:06
resistor one of the resistor leads now at the point that's in line with the RX
57:14
pin of the DF Player Pro and that happens to be at Point
57:20
A8 and the other end of the resistor or its other lead is in line with this blue
57:27
jumper wire now at A2 at Point A2 so having this 1kohm resistor here will
57:35
hopefully reduce some of that noise I will play a couple of Clips next that
57:41
will show the the differences in sound quality uh the first being what it
57:48
sounds like as we had it before we added the resistor and then what it sounds like
57:55
once uh I've inserted the resistor at uh the RX pin of the DF Player Pro in line with
58:04
the blue jumper wire that goes to pin two so we'll listen to the different
58:09
sound qualities real quick and if I just happen to arbitrarily choose a 1K Ohm
58:17
resistor I've noticed that online most uh images and information
58:24
that I found about resistor sizes place it to put in place in line with the RX
58:30
pin of these DF player Pros is usually a value of 1K ohm or around 1K ohm but you
58:40
could test out yourself different resistor values you can go smaller than
58:46
1K ohm that's most likely going to not
58:51
uh help out as much as this 1K ohm resistor would be a value less than it
58:57
but you can try higher values of resistances maybe such as uh you can try
59:03
a 10kohm resistor and see how that sounds I would just play around with it I I haven't personally done it I just
59:09
stuck with the 1kohm but you will tell in the two comparison video clips that I
59:15
will share with next that there's an obvious uh reverberation or Noise Within
59:24
the speakers when there's no resistor and there is a little bit
59:30
better quality in the sound with the resistor but there still is some noise
59:38
coming from the speakers even though I have a 1km resistor but it sounds a little bit better but as I said you can
59:44
play around with it as much as you like and just try it out I really encourage you to play around with it and and see
59:51
what works best for what you're looking for out of this project so we'll listen listen to those two audio clips in
59:59
comparison of the sounds coming from the speakers with and without the resistor and that will finish us up for part two
1:00:05
of how to make an albot the bird Intimidator again this was part two
1:00:11
making sounds in part three what we'll do is we'll end up adding some flashing
1:00:17
red LED eyes to our albot prototype so that when the pier sensor senses motion
1:00:24
the albot will start playing sounds and also start flashing its red LED eyes oh
1:00:30
and I just noticed we mustn't forget to put the orange jumper wire back and that just goes to pin TX to the DF Player Pro
1:00:40
and it the other end and the other end goes to pin three of the
1:00:46
Arduino just like that
1:01:25
okay the this has been how to make an albot the bird Intimidator part two making sounds next time we're going to
1:01:33
be adding the albot flashing red LED eyes so by the end of the next part in
1:01:40
this series we'll have the ability for motion sensing through our peer sensor
1:01:46
making owl sounds from our DF Player Pro Mini MP3 player and the two speakers
1:01:52
that we've attached to it and then we'll have the AL Bots red blinking LED eyes I
1:02:00
want to thank you for joining me for this fun project I hope you have enjoyed
1:02:06
it as much as I have and I will be seeing you in part three of the albot
1:02:13
project remember keep at it and stay motivated

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