[NOISE] Thank you very much. 0:00 It's a pleasure to be here. 0:03 This is Future Insights live, right? 0:06 Show hands. 0:08 That's where we're at. 0:10 Okay. 0:11 So I guess, you know, to stay in that vein of 0:12 Future Insights live I've decided that we should do everything live. 0:16 So what i'm going to need from you I 0:20 guess before I get started, I should introduce myself. 0:23 Although that introduction was great, thank you. 0:26 My name is Emily Rose, also known as Nexi Love. 0:28 I work at Sauce Labs Incorporated as a Software Engineer. 0:32 And i'm on the mobile R&D team where we're trying to 0:37 get real devices to work in a cloud at scale so that. 0:39 Everyone can test on real devices instead of emulators, because most 0:43 of us who have actually played with them know how that goes. 0:47 So yeah the title of my talk is node js hardware hacking live. 0:50 And like I said in the nature of doing things live 0:56 here, we're going to try to go from zero to prototype. 1:00 In 50 minutes. 1:04 And as you may see I have a table here. 1:05 There's two chairs. 1:08 I'm going to bring you to the next slide. 1:10 Which is audience participation is required. 1:12 So there's at least two of you out there. 1:16 There's at least two of you that fulfill these requirements. 1:19 I'd like you to raise your hand. 1:22 One. 1:26 Two. 1:27 Oh, there we go, we have one. 1:27 I'm sorry, is your name David? 1:28 I've never met you before, David. 1:31 Thank you. 1:32 Come on up. 1:32 Anyone else? 1:34 Not a single person out here. 1:35 No? 1:39 You, are you, I can't hardly see. 1:39 All right, great, thank you. 1:40 It was about to get awkward, cuz I was gonna start, like berating everyone, and. 1:42 That wouldn't have been good. 1:46 So, while you're transitioning up here move 1:48 on to, stage 2 of audience participation. 1:51 We need to get as many observers as we can get or fit on stage, and your job 1:55 will be to encourage our test subjects, observe fascinating 1:58 details that you can't observe from way back there. 2:02 I also have stickers. 2:05 I don't know if that helps. 2:07 So they're kind of shiny star stickers. 2:09 And also moral support for me, because I don't 2:13 know if you can tell but I'm extremely nervous. 2:14 I haven't really done much of this before. 2:16 So, I'd really appreciate if anyone would also like to come up. 2:17 Anyone, anyone at all. 2:21 This is just terrifying. 2:23 Thank you. 2:25 Okay, phase three, for the remaining members 2:26 of the audience, as questions on any 2:29 time as they come up and you can join us on stage whenever you 2:31 like, discuss among-st yourselves or just browse 2:35 predator hacker news whatever whatever it is, 2:38 you know, so you gonna do any way, Alright, so this slide was designed for. 2:41 Figuring out what we're gonna do, but your already here so we'll just skip on. 2:47 All right so, to give you guys kind of a brief overview, of what we're doing. 2:51 If my two participants could try to identify the arduino, that would be great. 2:56 >> [INAUDIBLE] >> You would guess correctly. 3:03 Okay, so 3:08 There we are. 3:12 Arduino. 3:13 features, it's an 8 bit AVR processor. 3:14 It's very, very fast. 3:16 Has a lot of memory. 3:18 Almost as fast as your laptops. 3:20 the, the main feature behind this guy, though, is that it has digital and 3:23 analog IO pin, so if you guys could hold it up for the audience. 3:26 There's this little black rows, see if you were up here, you could see what 3:30 I'm talking about, but you're all probably 3:33 familiar with these so, we'll just move on. 3:34 All right, and then the next component we're 3:37 going to use here is the Ultrasonic Sensor. 3:38 Those are the only things left in the box. 3:41 So if you guys could grab those and start opening those up, that would be great. 3:44 And then the idea behind these guys is they use the the power of 3:49 the sound to determine approximately how far away a, a, a nearby object is. 3:52 They make an awesome annoying feint clicking sound when they're working. 3:59 Surprisingly sensitive. 4:03 They work for many applications. 4:05 So they've been a favorite of mine for, for quite a while,. 4:06 Yes, just crack it open, I have scissors too somewhere. 4:10 A sticker for you, Greg, would you like a sticker? 4:14 Thank you. 4:17 To the rest of you, Greg just got a sticker, 4:18 what are you guys doing with your lives right now? 4:21 OK next component is breadboard. 4:24 Show of hands, how many of us are familiar with a breadboard. 4:26 Okay, so you guys are paying attention. 4:30 You have some okay, so, we'll, we'll kind of see 4:31 if that, it's a, a, r, I can't talk today. 4:36 it's a, a grid of bridge rows, it has a little power rail on the side. 4:39 They kinda get the idea there. 4:44 The last component is, is highly technical,. 4:46 You know don't be ashamed to ask question 4:49 if you're really not familiar with this guy. 4:51 It's called a light emitting diode. 4:53 It emits electricity or emits light when electricity flows. 4:55 Very low power consumption. 4:59 Ubiquitous acronym. 5:01 Pretty inexpensive too so. 5:03 So there's that. 5:05 Oh that reminds me. 5:06 My participants will need LED's to complete their task. 5:09 So heres some LED's for you. 5:14 Various colors you can take your pick but please choose one of each color. 5:17 [SOUND] And once you have selected your LED's, 5:24 [SOUND] great, [SOUND] So, once you selected 5:30 your LED's, and you're ready to go, 5:35 you can get started with the setup. 5:41 I've just published a little Git Hub repository. 5:46 You can see either here or to your right. 5:49 If you have trouble I have 5:53 I have a thumb drive as well. 5:56 But we'll get started there and then now might be a 5:59 good time for the sound guys to start the background music. 6:01 That's pretty much all of my presentation. 6:04 We're like what seven minutes in we've got another 45 minutes to go. 6:07 It's gonna be great. 6:10 I mean have the fact that the rest of you look really bored but. 6:11 Again, I will implore, any of you have, have even an 6:14 inkling of interest in this, to come up and take a look. 6:17 I have additional hardware here. 6:19 If anyone would like to play along, you can just 6:21 kind of, sit on the floor and look really glamorous. 6:23 It would be fantastic. 6:26 No? 6:28 No one? 6:28 Anyone? 6:28 You! 6:29 You sir! 6:29 Right there! 6:29 Yes, come on down! 6:30 You look really interested! 6:31 Yeah? 6:33 No. 6:33 All right. 6:34 I'll have a try. 6:37 OK, Greg's a good sport anyway. 6:38 [MUSIC] 6:38 >> So I guess what we'll do, since we don't have 6:49 a whole lot of additional participants is I'll try to play along. 6:52 With these guys as they get set up. 6:57 But forgive me if there are long pauses, it's 6:59 kind of more of a workshop format than a talk. 7:03 So like I said if you have any questions at 7:07 all please feel free to come up and ask them. 7:08 For the rest of you that are around you 7:13 can just read Hacker News or what ever works. 7:16 [MUSIC] 7:19 [MUSIC] 7:39 And if you guys could just let me know when you're ready. 7:44 When you've got the software installed then we'll 7:50 get on to the next phase which is, 7:52 yeah, here's one for you. 7:58 One for you, sir. 8:00 There's the new color/? 8:02 there. 8:06 So essentially what we're gonna do is once I get all 8:09 set up, we're just gonna go through like really basically, like prototyping 8:12 [MUSIC] 8:17 This is a very basic entry level project. 8:18 there'll be an LED, there'll be an 8:20 ultrasonic sensor as you saw in some slides. 8:21 And we'll see if what we can get, get them to have it do on stage. 8:24 [MUSIC] 8:26 [MUSIC] 9:02 [MUSIC] 9:20 [INAUDIBLE]. 9:35 >> Well, the cool thing is that, I [INAUDIBLE]. 9:40 >> [INAUDIBLE] So I'm good to go? 9:43 >> You should be good to go. 9:46 >> [INAUDIBLE] >> Great. 9:49 So, you ready to go as well? 9:52 >> Yes. 9:53 >> Okay. 9:55 So our participants are ready. 9:57 So that brings us to phase two, which is taking a look at the actual wiring. 10:01 This is a program. 10:07 That I've become very fond of. 10:08 It's called fritzing and if you have any 10:09 interest in this stuff it's super helpful to kind 10:11 of keep track of where you were in the circuit, kind of map it out in your mind. 10:13 It does a lot of tracing for you as well. 10:17 But the idea here is you two will take 10:22 your wires and reproduce what I've drawn right here. 10:25 On the bread board which, you can see in front 10:28 of you, or to either side of you I guess. 10:31 Is that me? 10:33 Okay. 10:34 [MUSIC] 10:35 [MUSIC] 10:47 And it's nice to have a crowd slowly amassing as things are progressing. 10:51 Maybe that's the way that we'll be doing it. 10:56 But before the end, we have another 38 minutes. 10:57 Hopefully we'll before the end you'll all be up here, so it seems inevitable. 11:00 You might as well just get it over right now and just kind of come up. 11:05 Okay, yeah, you. 11:08 Yes. 11:10 Thank 11:11 you. 11:13 Just grab a chair, bring whatever. 11:14 We were gonna have like fog machines and haze generators and strobe lights. 11:15 Fell off the track. 11:21 I've heard that before. 11:23 That's what happened to my drum too. 11:24 [LAUGH] Yeah, yeah. 11:26 So you're welcome to sit, you're also welcome to just kind of crowd around 11:30 and, you know, kind of intimidate them as they try to get their work done. 11:34 [MUSIC] 11:38 So, to explain how this works we have. 11:48 A blue rail across the very top. 11:51 And we have a red rail, just below that. 11:53 And that represents, positive and negative. 11:55 I said that backwards. 11:57 The blue is negative, and the red is positive. 11:59 And so you'll see, at, at the sight of 12:02 Aduino, it's, it's, it's very, very hard to read. 12:04 but, the, the third pin down, or the fourth pin down. 12:08 Let's see. 12:10 [MUSIC] 12:11 Yeah. 12:15 Third pin down on these guys is five volts. 12:16 That's a very important aspect is that you bring 12:18 five volts onto your bread board rather than three. 12:19 And then ground is the, the last and the second to last on that same header. 12:21 [MUSIC] 12:27 And by pinning this out what you're 12:29 doing is, you're providing electricity to that entire 12:31 row, if you, if you notice when I click here, I see yellow and that's 12:34 basically fritzing telling me, hey all those 12:38 pins are connected, the same thing happens down 12:40 here if I click on one of these rows are also all connected as well 12:43 [MUSIC] 12:47 >> It's like the second to last one on that [UNKNOWN]. 12:56 Does that make sense? 13:01 >> [UNKNOWN] >> Perfect. 13:02 Awesome. 13:04 Awesome, so as you can see, that was insanely fast. 13:05 These guys got two pins hooked up to their bread/? 13:10 board in like, what, three or four minutes. 13:12 And both of these guys from what 13:14 I understand are fairly unfamiliar with hardware hacking. 13:16 So, step one was super easy. 13:20 Let's move on to step two, just draw the rest of the owl. 13:22 So step two. 13:26 As you can see is also quite simple. 13:27 We've only added maybe one or two additional wires. 13:31 But that's where we're going with this. 13:36 So let's step back just a little bit. 13:40 [LAUGH] 13:42 So let's step back a little bit and let's see. 13:45 What what'd be the simplest thing that we could do. 13:46 Right now. 13:49 With what we have on the table, we have an LED. 13:50 We have an ultrasonic sensor. 13:52 Any ideas from the audience? 13:55 What would be, like, the simplest thing that we could get started with? 13:56 You. 14:04 >> [INAUDIBLE] >> That is an amazing idea. 14:04 So let's start with that. 14:05 Let's get an LED out. 14:07 And we'll put it on the red board and 14:09 I will follow along virtually right here on my computer. 14:11 And drop this guy right here. 14:19 And one thing to note about LED's. 14:24 I'll let you plug them in first and then figure it out. 14:27 One thing to note about LED's is that. 14:29 They have a flat side on them. 14:31 And that indicates the polarity. 14:33 And light emitting diodes, being diodes, only 14:35 allow electricity to flow in one direction. 14:37 So the flat side, that you can feel as 14:39 you're holding the actual package, is the negative side. 14:41 And that's the side of it that needs to be attached 14:44 to your negative rail at the very top of your breadboard. 14:46 So, I'll go ahead and do that now 14:49 [MUSIC] 14:50 We'll color the wire just so it's obvious. 14:59 [MUSIC] 15:01 Perfect. 15:14 You see how exciting this is guys. 15:14 [MUSIC] 15:17 This is like, this is amazing stuff. 15:17 So now what we're gonna do is we're gonna hook the LED up to voltage. 15:20 There's only one small problem though. 15:25 Our Arduino provides up to five volts of voltage, 15:26 and the LED's are rated for like two or three. 15:29 So thus we must introduce the complexity of a resistor. 15:35 [MUSIC] 15:38 And for the sake of not really explaining all of the complex math that 15:39 I don't really even hardly understand, I'm just gonna tell you what value to use. 15:43 And that's 220M, it's approximately a 220M resister, 15:47 and what you're gonna do is you're gonna 15:50 take that resister and you're gonna use that 15:51 as a source to provide power to the LED. 15:53 E-D. 15:57 So we do that by just plugging one end on 15:59 the same row of pins the LED is plugged into. 16:00 And then you plug, yeah just pull it right off the script. 16:06 [MUSIC] 16:09 So here I am taking a resistor. 16:16 Closing down the bread board, wiring it up to the positive 16:19 [MUSIC] 16:23 How're we doing so far? 16:35 [MUSIC] 16:36 These two gentlemen look like they're having a blast. 16:46 >> Don't they? 16:49 The rest of our, our participation folks here, they seem a little lonely though. 16:50 I mean there's only three of them on stage and how many of you out there. 16:55 [MUSIC] 16:58 David. 17:06 I was gonna bring, like, bubbles, for you guys to blow 17:08 while we do this but then I was like, eh, electronics. 17:10 Like, yeah, maybe, maybe not. 17:14 [MUSIC] 17:15 >> Yes, this guy. 17:19 >> Anyway, where would I pout this resister. 17:21 >> Resister, yes, you are correct. 17:24 You advance to the bonus round. 17:27 So basically what were going to do as now 17:28 as I mentioned here, one side of these is flat. 17:31 You can kind of tell if yu squeeze it with your finger. 17:33 That the negative, it's also the shorter lead. 17:36 So what you're gonna do is you just pluck it down anywhere as long as you know which 17:39 side is which, and then you're gonna put the, 17:42 the resistor you put the resister on the same row. 17:45 So notice how you have them numbered. 17:51 So just put a resister on the same row. 17:54 As one of the leads. 17:59 So like, right, 18:03 right here. 18:06 So 18:06 to explain I can hardly, there you go, there you go, yeah. 18:09 No, to explain each. 18:16 set of five pens is bridged. 18:18 So the letters are bridged. 18:21 The numbers are not. 18:24 It that makes sense. 18:26 I'm probably explaining it in a really complicated way. 18:27 As you see David here has a blue LED that has been illuminated. 18:30 David, how do you feel about that? 18:35 >> Pretty good. 18:38 >> Could David get a round of applause for his efforts. 18:39 [SOUND] Thank you. 18:41 You're very generous as an audience. 18:44 So, 18:47 so I guess David is going to help, I'm sorry I didn't even get your name. 18:50 Rock-o. 18:53 David is actually going to hop, so I'll just stand here. 18:56 [MUSIC] 18:57 So close, yet so far away. 19:11 [LAUGH] Now we've just 19:15 demonstrated big ground. 19:22 It's a very important component in electronics. 19:29 So, favorite text editors. 19:44 Fin, Emax, Sublime, there we go, that's a safe bet. 19:48 So, once. 19:54 We're ready. 19:56 We're going to progress into the software portion. 19:58 Just, just briefly of this, of this presentation. 20:02 And see how we can program them. 20:05 Maybe they'll, maybe they'll flash or light up or, or what not. 20:08 [MUSIC] 20:12 Okay. 20:16 >> [INAUDIBLE]. 20:17 >> Okay, so we're gonna divide real quick. 20:17 So. 20:21 >> Raisins, peanuts, apple juice, vodka martinis. 20:23 >> So you have, [CROSSTALK] so let's see here. 20:28 [MUSIC] 20:32 >> Ha. 21:06 Ta da. 21:06 >> Another round of applause. 21:08 Woo! 21:10 Going a mile a minute here. 21:11 All right. 21:14 So, we have one red LED, one blue LED. 21:15 What should we do next? 21:20 Any ideas from the audience? 21:22 Yes. 21:25 You. 21:25 Oh, you were just. 21:25 Okay. 21:28 Sorry. 21:28 I thought you were raising your hand. 21:28 No? 21:30 No ideas? 21:31 All right. 21:31 I'm gonna throw one out there, then. 21:31 Let's see if we can use software to make it do something more than just stay on. 21:32 So, open your favorite text editor. 21:37 Obviously, we all use Emacs, right? 21:45 So just fire that up, operating system in your operating system. 21:49 So what would you like to do? 21:56 Would you like to try it just from scratch? 21:59 Or do you want to start from kind of a basic starting point? 22:00 How adventurous are you feeling right now? 22:03 Keeping in mind we only have 27 minutes left. 22:05 >> [INAUDIBLE] >> Great, so let's open up one.js in the 22:07 no ha-ha live folder. 22:13 I'm sorry. 22:20 Not really. 22:24 So while they're 22:27 getting it loaded, I'll go ahead and open it up for you. 22:32 We'll take a look at the code. 22:39 Can you guys see that? 22:44 Everyone in the back see that okay? 22:45 Those of you that are paying attention? 22:47 Great. 22:50 So let's go over this ten lines of code real quick. 22:50 Those of you that are familiar with NodeJS, you're familiar 22:54 with require, it's the only requirement we have in this. 22:58 Basically, what we're doing is, we're loading 23:00 Johnny Five library, we're calling it five. 23:02 We're declaring a board and a white variable. 23:04 Then we'll instantiate the board by saying hey, give me a new five board. 23:07 And Johnny five is so fancy and intelligent that it actually just 23:12 goes out on your devices and looks for something that looks like [UNKNOWN]. 23:16 If it finds one it'll attach to it. 23:19 And then we say when the board's ready. 23:22 Let's use some stuff. 23:24 So, we're gonna say, hey, give us a new 23:25 white LED on pen 9, and then make it pulse. 23:27 So, right now, if my participants were to run this, it wouldn't do 23:31 anything because all the LED is hooked up to, is just direct power. 23:34 So what we're gonna do is instead of directly powering 23:38 the LED with the power rail, we're gonna introduce another jumper. 23:42 We're gonna run it from the positive 23:46 lead on the LED to pin 9 on the [UNKNOWN]. 23:53 The LED which is, which is longer. 24:03 Can you guys hear the questions the participants are asking or no? 24:06 Kind of? 24:08 Okay. 24:10 [MUSIC] 24:10 >> [INAUDIBLE] Jump the gun. 24:23 >> Ta da! 24:46 Another round of applause please. 24:48 I don't know, can you, can you guys see this? 24:49 It's now kind of fading in and out. 24:52 This is what's called pulse or whatever. 24:54 So, here we are. 24:57 25 minutes in, we have an LED pulsate. 25:01 Let's see how much further we can go. 25:05 [MUSIC] 25:06 Now we have two fading LEDs. 25:16 Another round of applause. 25:18 Not to cheapen the applause or anything, but 25:21 this is you know, this is intense stuff. 25:23 These guys aren't that familiar with things, they're 25:25 on stage with me, looking like fools with me. 25:27 This is a pretty big deal. 25:29 All right, so what's next. 25:30 Should do you like a button or something? 25:35 Buttons sound cool. 25:37 So there should be, lost amongst the 25:38 rubble there, there should be two momentary switches. 25:40 Technical term. 25:44 Tap switches, button. 25:46 And what you're going to do is you're gonna lay 25:48 that guy down in the middle of your bread board. 25:50 It's, it's kinda particular so I'm gonna show. 25:52 Let me show you right here. 25:55 It's just like that. 25:56 Right in the middle. 25:58 And then you can show Dave. 25:58 I'm 26:00 on the microphone. 26:04 Now we can have, like, commentary. 26:08 But that aids the whole theme of doing it live, right? 26:11 Live commentary. 26:14 Thank you. 26:15 I appreciate that. 26:16 [MUSIC] 26:16 Yeah. 26:26 And so the idea behind this is to kind of bridge it right between the two sets. 26:27 It doesn't really matter, but it helps get it in there nice and firm, 26:32 and it doesn't pop out and make it look like you did it wrong. 26:35 Great. 26:38 So, as you can see here, I'm gonna kind of highlight with my mouse here. 26:39 These components right here, represent that button that you just placed. 26:47 This being the button, these being a lead to pin, 26:52 I think it's pin 8, it's really hard to see. 26:57 So, what we'll want to do is you'll want to connect a lead 27:03 to the leftmost pin on your button, connect that onto your [UNKNOWN] on pin 9. 27:09 >> Wire? 27:14 >> Yeah jumper, lead, wire. 27:17 Any questions from our, from our audience? 27:26 The ones that are paying attention? 27:29 Yeah, it's, it's fantastic software. 27:33 I learned about it from a guy named Rick Waldren, the guy that created Johnny Five. 27:35 And he actually uses it, if you go and you take a look at his 27:41 read me has actually got sketches of everyth, 27:45 every component that you would want to use. 27:49 He's got a read me with fretting diagrams for it. 27:51 Example code. 27:54 You can kinda scroll through here, if my internet's working. 27:56 Which of course it isn't because I'm on stage. 28:01 But there's, take my word for it, or check it out on your computer. 28:04 GitHub.com/rwaldron/johnny-5. 28:08 For those of you that are interested, this is 28:10 kind of a treasure trove of functionality all ready to 28:15 go. 28:20 So, back to this, we've got one 28:21 pin connected, yeah, looks like we've got that. 28:22 Great Dave, you're on the same page. 28:26 Yes. 28:28 Speak into the microphone. 28:29 >> The the LED had one side that was for ground and then 28:35 one that was for power, does the switch also have the same output. 28:38 >> It does not, but that is a great question. 28:41 Switches aren't quite as particular, which is nice, 28:45 they just allow electricity to flow in either direction. 28:48 Now I'm going to pick out another set of resistors of 28:54 very particular resisters, don't question me on this, but pick a 28:57 10K Ohm resistor, and what you are going to do, is 29:01 your gonna hook that up to the other side of that switch. 29:04 So, just like you have right here. 29:08 Right here. 29:11 And that resistor is going to go to ground, which is the blue red. 29:12 Is 29:15 everyone with us so far? 29:18 And questions? 29:19 Any concerns? 29:21 Any comments you'd like to add? 29:23 Yes, you. 29:26 Did you have something to say? 29:27 No, okay. 29:29 >> You might get them eventually with one of those. 29:32 >> Maybe I think so. 29:34 [INAUDIBLE] My eye itched actually, I'm sorry. 29:35 >> You do. 29:38 >> Either that or I'll be really afraid to move at all, I'll just. 29:38 Emily, what's your favorite thing you've ever built with an Arduino. 29:46 >> Oh, oh, Jeez. 29:50 The, my favorite thing that I've built with an Arduino so far has been an 29:51 alarm system that is based on this very 29:55 same Ultrasonic component, but also included Twilio functionality. 29:57 They allowed me to alert the club I was working for, if 30:01 there was motion after hours, we would all get a call to 30:04 be placed into a conference call and decide who gets to go 30:08 take care of it, or go take a look a the surveillance footage. 30:10 Nothing too fancy, but it was really easy and inexpensive, and 30:14 it kind of served the need that we had at the club. 30:17 And that's kind of how I got started doing this. 30:19 Great, so we have the resistor placed almost? 30:24 Okay so and so 30:30 the only other thing 30:35 left to do is to give 30:42 that button power. 30:48 And by giving that button power, what 30:55 you're doing is you're allowing the signal pin 30:57 that we have attached on pin nine to tell the Arduino hey, the button's been pushed. 30:59 So, grab another 31:03 jumper. 31:10 Let me fix this for you. 31:13 Fix this thing for you. 31:19 >> [INAUDIBLE] And then just [INAUDIBLE]. 31:22 >> [INAUDIBLE]. 31:24 >> I got this one here and then 31:26 I don't know where it is. 31:32 >> Has anyone in our illustrious viewing panel 31:40 built something with Arduino or act with no jest. 31:43 >> Just start going now, just start going now. 31:48 And what did you build? 31:49 >> LE Bluetooth low energy device, you know. 31:52 >> To do what? 31:58 How else >> Fry beacons. 32:00 >> Anyone in the audience? 32:06 Everything fun with Arduino and node? 32:09 >> Huh, one back there. 32:13 I'll come find it. 32:14 >> I see how it is. 32:18 [NOISE]. 32:18 >> I did a photo filtering program with push buttons defiltering. 32:25 Just for the fun of it? 32:32 And so how did you go through learning how to do that? 32:36 Did you use [INAUDIBLE]? 32:41 >> I used processing just through their processing interface terminal tool. 32:44 >> So. 32:50 >> College and projects and stuff. 32:50 >> Cool. 32:54 >> So now that our participants have 32:55 hopefully correctly wired the button, we're gonna 33:01 move on to 2.js which adds a little bit more, 17 whopping lines of code. 33:04 And now in addition to instantiating the LED we're also instantiating a button. 33:10 And it also, also just as simple V5 button on pin eight. 33:16 Did we put it on pin eight or did we put it on pin 9? 33:21 I forget. 33:22 >> I believe it was eight. 33:23 >> Great. 33:25 And then right now what we're doing is we're just saying hey, when the 33:26 button gets pushed send the message to the console that says hey, button's pushed. 33:28 So, hopefully the new button 2.js. 33:33 You push the button. 33:38 You should see the message. 33:40 [MUSIC] 33:40 So if it's telling you that the button is pushed continuously, and you 33:49 haven't actually pushed it, probably what happened is you have the leads backwards. 33:52 And that may be my fault, I could have told you to do it the wrong way. 33:57 Excuse me. 34:00 So, 34:01 [MUSIC] 34:01 Yeah, I mean it's great, it's nice to have 34:33 a little private conversation going on, you know, kind of. 34:36 Yeah, yeah, I mean, I'm sure they have conversations going on too, so. 34:40 But really though, 34:44 the only thing we're missing is you know, a bunch of lights. 34:51 >> A contortionist or something. 34:55 >> Yeah, that would be good. 34:58 [MUSIC] 34:59 Yes. 35:04 [CROSSTALK]. 35:07 >> It's not working. 35:09 >> Okay. 35:14 >> [INAUDIBLE] >> This one all the way. 35:15 Maybe [INAUDIBLE] >> Not sure. 35:19 [INAUDIBLE] So is it, do you have it running? 35:23 >> There. 35:37 [INAUDIBLE]. 35:39 >> Here we go. 35:41 We, we were off 35:43 [INAUDIBLE] again. 35:49 [INAUDIBLE] And now. 35:58 So both of our participants have just 36:02 encountered a very common pitfall. 36:09 And that is, because bread boards are composed of 36:16 pretty much of just tons of really tiny holes. 36:19 It's easy to be off by one. 36:21 So, participants were plugging their, their button in but 36:24 the jumpers weren't lining up with the actual leads. 36:28 so, that's pretty common, so they need to keep in mind. 36:31 If you decide that you are so inspired by the display of 36:34 awkward awesomeness that you want to go home start with Arduino right away. 36:37 So you can't see it from there because you're not up here. 36:42 But when our participants pushed the button, their console is 36:46 displaying a string of text, that is mind blowingly awesome. 36:50 So let's see if we can hook that up to LED instead. 36:55 That way the rest of you sitting comfortably in 36:59 your chairs can see when the button is pushed. 37:03 Does anyone have any ideas on how we might do that with code. 37:10 Anyone? 37:12 Yes you, right there, looking at your phone. 37:14 You had an idea on how to connect this properly to an LED? 37:19 Yes. 37:25 Yeah? 37:27 Yeah, come on up and show us. 37:27 You'll be great. 37:30 I'm gonna have a lot of people to apologize after this, 37:34 so. 37:42 So, yeah, so what we're doing right now is we are, we, we 37:42 have a button that's functioning and it, and it's emitting text to the console. 37:44 But now we need to get it, to light the LED up when we push the button. 37:49 And it seems like maybe you had. 37:53 >> Going through the code to do it? 37:54 >> Yes, yeah, through the code. 37:55 So here's where we're at right 37:57 now. 38:01 And so all it does is is the console logs. 38:02 But really what we want to do is we want to turn the LED 38:05 on and then we want to turn the LED off when they push the button. 38:07 You could do a a case, case switch which would take care of it so you do a switch. 38:09 Case zero, case one would be on and off. 38:17 >> It's perfect. 38:20 >> All right, thank you so much. 38:21 That was that was helpful. 38:25 So basically what we're gonna do is not at all that. 38:26 I'm sorry, that was a great idea, but 38:31 we're gonna do it a little bit differently. 38:33 Yeah, no once you come up you cannot leave. 38:35 No you can leave it's fine. 38:38 But you can take a start sticker if you want. 38:39 Okay. 38:42 Forgive me for a second here. 38:45 Blue, blue yeah. 38:48 Okay, so what are we gonna do. 38:50 >> I see you guys are, yeah, you're doing some guesses. 38:55 That's great. 38:59 I mean, no pressure or anything, but we only have ten minutes left. 39:01 So. 39:10 >> The API [INAUDIBLE]. 39:11 >> That is a great question. 39:15 Maybe we should try it and see. 39:17 So digitarial actually loaded from the last time I was 39:23 showing you this. 39:32 We'll take a look at the API for, for LEDs. 39:33 Give our participants something 39:37 to go off of. 39:43 Now I don't know if you guys saw what just happened, 39:47 but Rocco just got a button lighting up in LED. 39:53 Is that worth a round of applause, or are we tired of, of applauding? 39:58 [APPLAUSE] That is fantastic, so, we have nine minutes left, let's see 40:01 if we can hook up an ultrasonic sensor, that's pretty simple, right. 40:06 >> It sounds very simple. 40:13 >> Oh, yeah, I mean it's, you know, 40:14 just sounds waves and, electricity,it could go wrong. 40:16 So, Oops, here is a documentation for the 40:22 pink sensors, here's how you hook it up 40:27 [MUSIC] 40:32 [LAUGH] so yours is yours is right here, and 40:39 okay [INAUDIBLE] what's more difficult, 40:44 finding the code for this stuff, or 40:50 coming up with it, or actually getting 40:55 those little pins into the proper leads. 41:00 >> Yeah, it's definitely the, the little pins, yeah, the 41:06 thing about hardware is that it's kinda hard like you know- 41:08 [UNKNOWN] 41:11 >> Yeah, I mean, and when it comes to software, like you know, we're, all of us 41:12 as developers are pretty familiar with software, It's easy 41:16 to debug software, but how do you debug hardware. 41:19 That's, you know, generally speaking the most you get when your hardware's not 41:21 working is a beep code or and LED is flashing or nothing works. 41:25 >> Smoke monsters. 41:29 >> Other than smashing it in rage, what's the best way to 41:32 >> In my experience, the best way to 41:36 address those types of unsolvable bugs is just to 41:37 walk away for a little bit, and then come 41:40 back and generally, you know, after a couple retries 41:42 like that you'll just be like, oh duh, it was the wrong pin or the wrong hole, or 41:46 just whatever, right so yeah, it's one of those 41:50 things where there's no substitute for experience when it 41:54 comes to hardware and that sort of stuff. 41:57 But you know, the software stuff is great, 41:58 like very basic, straight forward, I mean originally 42:01 I was gonna do this demo in like 42:04 assembly, but I was worried that it wouldn't register. 42:08 And then I thought maybe we could do like C plus, plus, and 42:12 when it comes to C plus, plus like I still need, you know, pointers. 42:15 So, java script it is and java script is 42:18 such serious business, you can't make jokes about that. 42:22 >> No. 42:24 >> No, 42:24 [MUSIC] 42:24 So, where are our participants at, do we have 42:27 things pinned properly, am I showing the wrong screen? 42:30 [MUSIC] 42:34 Six minutes, gentlemen, the pressure is on, Is the 42:40 audience feeling pressured or just bored, you say bored? 42:44 >> Here's what I'm looking forward to. 42:48 >> Yeah. 42:50 >> When you get that sensor plugged in and they clap. 42:50 >> Oh yeah. 42:53 >> The light's gonna turn on. 42:54 >> For like the 12th time, yeah. 42:55 >> But, they'll be doing it this time. 42:57 >> Oh yeah. 43:01 >> Mm-hm. 43:02 >> There we go yeah, we'll bring everyone up and, and 43:02 wave their hands in front of it and, it'll work and, okay. 43:05 That's how we'll do it, okay. 43:09 >> So. 43:12 >> Sorry. 43:13 >> Does this go anywhere, or? 43:15 >> Yes, so basically we take a look here, you've got [INAUDIBLE] got sugar 43:17 and [UNKNOWN] so you plug that in, and you wanna take what [INAUDIBLE]. 43:23 >> seven. 43:29 >> [INAUDIBLE] seven. 43:30 [MUSIC] 43:30 [INAUDIBLE] Either 43:32 one and the reason 43:37 behind that [UNKNOWN] 43:43 on a [INAUDIBLE]. 43:49 >> Completely unrelated note I'd like to announce that 43:54 the Chinese philosopher Confucius has just followed me on Twitter. 43:56 He may have died in 479 B.C. but he did just 44:00 follow me, because probably cuz I shouted out, Jesse Cravens' Confucius quote. 44:03 Earlier today, but being followed from the beyond the 44:09 grave by Confucius pretty much has made my day. 44:13 [MUSIC] 44:17 >> That was smarter, I did them all in the front. 44:21 >> Mm-hm. 44:24 >> Yeah, that could be difficult, that looks nice though, yeah. 44:25 So, gotta it wired up properly the next step is to just move on to three.js. 44:31 And so I'll, I'll show the audience that as well, 44:38 and yet again, we've added a little bit 44:44 so, we're up to 24 lines of code. 44:49 And again this is just a console logging 44:51 some values but all we've added is ping equals 44:55 new five.ping on pin seven and we say, 44:58 hey, when the ping changes, let us know and 45:01 it'll either have an error object or a 45:04 value which is the raw value of the distance 45:06 that it measured and the really cool thing is 45:08 you can actually just type, as per the documentation. 45:11 You can just use this dot inches, and then it also just 45:16 has this.centimeters and it actually will tell you no, no calculation required how 45:19 far away the nearest object is, but if all we're really interested 45:23 in is, is change events, that's all we really have to worry about. 45:26 And, the code here that, that I'm demoing is, you know, it's a 45:31 very pared down essential version of what i kind of wrote for, for the 45:35 club that I was working and, and this went into production as an 45:39 alarm system and it worked pretty well, so we'll see what we can do. 45:43 [MUSIC] 45:47 [UNKNOWN] So we just had the question now 45:50 what is the range on these sensors, 45:56 and in my experience it's maybe 46:01 15, 16 feet of accuracy. 46:06 And then you get, kind of, some hit and miss in there as well for those of 46:11 you slightly unrelated, but for those of you who 46:15 are familiar with, like the Perrot AR drone, or 46:17 Perrot AR drone this is the very same type of sensor that's in the bottom of those 46:19 drones, that help it with knowing how high away, 46:23 or how far away it is from the ground. 46:25 So, you may not be able to tell just yet, the Rockwell over here 46:28 has his censer working, with only two and half minutes left in the game. 46:33 So, for those of you that have any interest left 46:38 at all, if you, you're welcome to come up and 46:41 take a look at what he has ended up with 46:44 obviously things went a little bit rockier than what I expected. 46:46 Audience's maybe just a little bit less willing to participate 46:50 then I had expected, but that's okay, I'll forgive you. 46:53 But all in all, I think we did pretty well 46:56 these guys seemed to have fun, our, our audience members, 46:59 our, our observers, definitely had a lot of fun standing, 47:03 sitting here, staring at the back of these gentlemen's heads. 47:08 So that was great in closing, I would like 47:11 to open up to any additional questions that you may 47:14 have and If you have anything else you would like 47:18 to say, I will be available, for hallway track questions. 47:21 >> Let’s give everybody up on stage, other than me, a round of applause. 47:25 [APPLAUSE]. 47:33 I had fun and I don't know how any of this works so It's great all 47:36 right so we've got let's see Matt Ruby coming up next I think. 47:42 >> Do we, do we have time for me to clean up all this mess? 47:47 >> I think we probably do. 47:50 >> Well, thank you all for, for humoring me, It was 47:52 a lot of fun making a fool of myself on stage. 47:54 [CROSSTALK]. 47:57 >> With all these folks and like I said, 47:57 if you have questions or yeah, you wanna talk 47:58 or you wanna borrow some hardware and, and get 48:00 hacking, I'm happy to help out, so thank you again. 48:02 [APPLAUSE] 48:05