hi everyone welcome to construct and dan and we're going to start today to talk about gears a little bit more detail and we've built several things using gear and i probably have talked about gears and i'm using the nice  time from a link go a link up with one of those companies that i use when teaching and stem things to my kids in my classes and a lot of my classes are hands on and the kids actually learn as they build and one of the things i try to make sure i get most of the concepts and and it really depends on the age of the students i'm working with so if i have somebody who's young here or wants more information you can always go to my web site which is debbie debbie to construct you come i have more details about some of the projects i work on because here i'm going through the motions and actually doing the build and discuss and what we're doing as we do it so the great thing about it lingo is i had mentioned before they have a lot of nice stem projects and at the beginning of my series you may have noticed i used electronic kit that they have loved it so this is another one this is actually a nice two in one gear box and the reason it's a two in one gear box is it has different designs for big years and the designs of the years actually tell you the speed depends on how you design the year and we're going to do the simple one today and i might come back and do the hard one it really just depends on what we're going to do so but before we go i just want to mention my inside robotics book i think i've talked about it the couple of times and i did want to bring it up again because i haven't talked about it much and one of the reasons i actually wrote the book was for different groups starting off trying to introduce them to their kids and a lot of kids now and it's great for study that in school so if you want to bring stem  summer camp are to a workshop or to a different organization where you work with kids inside robotics is a great book to get and read and then there's a kit that you would get with it that you can work with them and you can start kids with this kid probably at four because it's a lot of building and then it brings in the motorized component where you start talking while gears and motors and how they work and how you can build something in use in the different types of gears that it has so i just bought the i just have the book just to mention that as one of the nice things that you could start off with if you want to just introduce stand in your  vironment and this might be a good book for you to use and if you have any questions you just email me again at my email address is has struck you g mail dot com so you can always e mail me at now before i start another thing i  want to mention is that some of the things i love to have and i bring these with me but i don't have a lot of time when i'm doing a workshop during the summer i have more time with kids because my summer classes use these go from three to six hours depending on where i am and what type of workshop or summer camp i'm doing so one of the things that i always think is a great book and i wanted to mention this because i did it's science of everything it's excellent book it's a national geographic book and it goes and how things work in our world and one the reasons why i want to bring in to show it to you because i'm actually doing a construct in physics with a group of kids that i work in on and i went through my shelf and i found this book and i was going through this book and i forgot how much i actually love that it's a really really great book it goes over almost everything and detail and it's an excellent book just to have at home when your kids are asking you why you wanted you know tell them to read the book or if you have kids so interestingly a lot of things you can just haven't read this book or if you will just want to start in to do something different things are you can just see if you go through anything that happens like it goes over all the different laws and you know different phenomenons that make physics to that a great that are in here so this is a great book so i just want to recommend this for you if you are in that world where you are trying to teach a stem courses and you want to make sure your library actually matches what you're teachin so you have a lot of things in another great book again probably seen this one is the new way things how new way things work so this is another great good book and has several additions of this book and i got this i don't how many years ago but it is a great book too it don't have enough time to end this session so we might have to finish it up for the next one so what we're trying to do is we're going to build this simple gear box and this is a simple gear box built if you notice here it has w  i think this one is the slower and you're setting that we're going to build but as we build it one the nice things about hears and i just want to mention that because i'm probably going to mention it again we should is this one and we're going to start and i'll talk as we go so again this is and then go to win one gear box and i know they're on amazon if you want to pull it from there i also been doing classes on out school and i'm going to actually add this to one of my classes on out school so if you want to do it online class with me you can go to out school and look for have struck you on this monica ok so these are the two years that we can do that this is a one in sixty which is the rotation is a little bit smaller than the rotation here so we are gong to build the bigger years which have a less rotation because there are less teeth on the wheels on the gears so as i said this is a year so this is if you look at this year has two gears on it and the top tier is smaller than the bottom here and the weight gears work like i said they are simple machines and we all know what simple machines are simple machines  machines are made of built that were made to make life easier and the type of a simple machine that i hear is actually a wheel and it's a wheel with teeth if you look at it and the way it works you actually put gears and you can you put gears together where the teeth are they go together like that so the force applied from one to fifty think about it like t v or one kia will push movie of the and the way it works is that you have driver and driven gear so one gear is actually the power gear it's the gear that's attached to whatever power source you have so if you have  let's say if you just if if your if we take this in for example and you're just spinning it the powered gear will actually be the ones i'm spinning here and it's going to make everything move but if i was to attach power source to my motor the power get with a b this pinion gear here and that would make everything move so here's a great things because one of the things that they can do depending on how you make the gear train how you ali figures they can actually set you can set up to change direction of the movement with gears and them you can change is speed dependent and the speech chain is very simple because the power here let's say if you have ten t for that and then you attack something to it that might have twenty on it and you think about how many times that ten then here with ten t five to go around before that twenty go around goes so for example if this ten here is a twenty here they're set to go around twice before this one so if you attach something to the bigger gear which have more teams then it slows down a little bit because the main gear has a go around twice were going to use this so we have these four here y in this again is your motor and one of the things i have been doing with my class is we build a simple motor for us so they understand how motors work and i guess we should do that too so this is a model so we take the motor and we put it on this gear but presses down it's very simple lined up press it down you have a gear on here that's the first part you're doing because this is this is actually going to go through here but we're going to build the gear configuration first and what i'm going to use is i'm going to use their motive boat and one of the things i like about this and i should have said that earlier is that you can use this gearbox if you want to make a car and we do that too in some of my classes you can actually use it just to illustrate the gears on the car how that how that works you can also set it up where you can attach a power to it put a switch on it there's a lot of things and i actually use it in my book here i have a section where i use this configuration because i like i said i really like it and it seems easy to do so here i've done the same thing i actually added wheels here and i took it and power to it and made it later i think in the book when i actually extended the the whole series a little bit and i made a car with it which is a nice thing that you can do too and i find the pitch of that be great if not i will move on i'll hear this through what i did is i actually took it and i made it into a little car very simple car which i had done with my kids and in class to sell it's not the best looking it doesn't have some it's not as pretty but it's a nice way of introducing gears and motors and have the kids make a car too so it's actually in this book if you're interested in that so you can it's on amazon and or you can go to my com so let's go back what we don't so what i want to do because i do have my different directions over here so i don't want to miss something which i tend to do sometime when i'm talking fast and trying to finish up so we may axle so the two sides axles with it so if you're starting off with a class i suggest you use the big one because you know not sure if you're not sure what you can design because if you decide decide to do a car it might be better to use a big axle because then you can just put wheels on it but i think and i think the diameter is like two millimeter forward if you want and i have wheels at home for it too i should've brought them but i can't of course if i don't finish now i will do that i'll bring the one next when we can work out ok so let's thought so what we're going to do with this one we are just gone to add the the let me make sure i have the right ones because i am looking at this and i'm sorry to say because that you want to make sure that one of the things you have to do and i always tell my kids they want to really be careful when you're when you're working with this is you have to make sure that you put the gears on correctly and when you work with a bunch of kids that easier doing it this way because then you just take the white here on and you do the thin white here on first and this one is a little bit hard to put on the kids have to put it on the lips sorry a little nervous today not sure why i am you want to push this on of course though here like i showed you not like i just did and you want to push just said now like i said it's a little harder because you want one of the gears to actually hold everything in place and this is the year that does it so the way i do it i actually have my kids and if you have to with this one it actually recommends when i first got these the age would eight and up and lately they've changed and i think i notice two twelve up which is well known they have fourteen two adults which could be it's really up to you if you're working with students then you have to put all the safety measures in place and if you if they're doing it at home i do suggest that the kids are older and to follow the ages that they have in the box i have done it with younger kids but it's been a lot more hands on and that's ok too because they're all learning so of course i just push the woman talking and i need to push back a little bit so you put that first period and i was and i have to say i use whatever table so you want to you want to be an environment that it's ok to scratch up the table are two and i hope it's ok here are to do any of kind of work with it so with this we want to push this down a little bit more because i pushed too much which is ok and i hate to say that i've done this a couple of times with my kids too so then you used to take the white and the next thing you're going to do is you in the news to read they do white thing you do read so we're going to try to get the read here after this i'm going to put that read on and i'm going to move this down a little bit and it takes and i don't have any of my t ls with me is one of the things i usually do not walk outside without but that's what happened today self we're going to move this take this and we're going to put the red here on next so you want to do that like i said i want to push th specs now one of the things i actually could do i could do without the red but you need the red here because if you look at the way the design is this year all that years ago become neck that so when you put this one the first one is not it's kind of just hold it in place but the red the green and the other white a very important aspect of this white is more important because it's going to be attached to the pinion gear which is from the powder from the motor of course if you put electricity motor it's got me a power here so i'm going to press this a little bit i'm trying to find someplace to do this because of course i did not bring anything with me so i'm trying to make up the distance when i'm talking with you guys so  i just did this with twenty kids and it was a little bit interesting because every year kids are at different skill sets i don't recommend this as an afternoon which i do i do it after school camp i've actually built this and it took about i can i had twenty kids it took about three weeks for us to do it and we didn't get to the whole park with some of it i wanted to actually build the car and we didn't get to that because of it it would be excellent camp for summer camp because you can have three hours you can work with and then so i think i suggest that if you're doing it i'm trying to push this down because of course i made th done and i will do this at the next one will build it again other because i don't have my piece here but this is what i should have done i we put the your white gear on and the thing about it which a kid you have to set you have you know you have two packs of years that's why it's a two and one year so that you have to make sure they don't mix up the years the sizes and the gears because the two sets actually that diameter of the gears are different so you have one that's bigger and one the smaller and the you have to actually watch that when they're working on it so one of the things you want to do is you want to make sure everyone has the same set because if it doesn't it's not going to move and if you notice here this doesn't move so this is a good set you can tell it's moving so one of the things we're going to do is just move ahead a little bit and i'll work on next and we'll build this together so you're just going to have to swap  if i want to as i said that this is the gear set that comes from the box you know you build it and first you put the white went on and then you put the red and you do this set for this one first this have to have to actually touch the red one so if you notice me move in the green the red one now moves and if you also notice that the red one moves this one in the middle but here in the middle right there is the one that moves with the movement green and this moves when i move in the green too and that's movement it's because of the fact way that is working with the red here so if you look at that you can tell these all should be the same diameter these are left of one of my classes so i like to make sure it's a sometime i'll take something i'll have something extra because it didn't work  so one of the things i said so the power here you can use twist to surround it should move everything you should be everything the move and i'm just moving the gear things see everything move and so one thing you want to do is test it and sometimes that actually is one of the hardest things if you don't have the gears correct lead design here it won't move with electricity so i do is i actually test this and i have my kids do it too and i we do it just take wires and a battery and just a test to make sure it moves like the way  so we're just doing it like that which is very simple if you're thinking about it and then i just have a low battery and i want to see if i can get make the painting here now that's on attached to the motor so in this you can do two things with  extras that i had laid around you see it's very simple i have the pretty fast too so we were to you the longer axle which i will do next time i ha turn this on and off because right now i'm just unplugged but if you add a switch to it it's really nice thing to do too because at the kids are building a car with this so they built the gearbox than they do  so is pretty fast if we have wheels so we take this off and i have another one that i built i don't think this one is a little work as well and i'm not sure i can't remember why i had these two extra one of these i can use to now to build a car and i have and we're going to do that next time because of course i made my mistakes with this because i pushed it in too quick so don't do that  another thing have the tools i then bring my tools with me and i usually have my tool box with me all the time so that's a problem and this is something that really can happen in this happen my kids they push and they what they do is they just push it quickly just like i did because i was a little nervous talking to you guys but i will rectify it but next time so what you want to do is you want me to push this back out and then you want to put the read on and then we put this other one though it's the same thing we did before but we'll make this one longer