i like for my kids to take things home because what happens once they take them home they actually experiment sometimes they bring them back the next day because they don't remember how the structure went which is ok because i know they're learning and i know they're working with everything so that's what i want that's my goal my goal is exposure to make sure this is something that interests them and you like it and they they feel that sense of accomplishment when they do it so we are going to actually and first and this is first rolls and they have rolls across and columns up and down and when you connect something together you always connected in the same row ok and sometimes if you buy these they actually have been they have pipe and there's no pressure the water would just sit in the pipe that what you want the what induced to move along and voters is actually what help the left was electricity because the circuit move along it's to let the current move along so that's what i'll vote to so what we have here is take out what we need so we need the battery and our battery holder you resist or you are breadboards and take out a diode when i mentioned last time the called l e d s and the thing about them is their one directional so the the circuit the current will flow one direction so goes on the positive so you go the positive in the battery all the way through the positive end of the l e d so we have to make sure we do that in the way we do that is the l e d s are very nice they actually have two poles too long terminals and the longer one is out positive in the short one is on blue and yellow for my two and we're going to start so the first thing you want to do is you want let's put our battery and i think we should put our battery and three and if we start off with three put it in three three so you can have anything actually in your breadboard it should be empty right now on the only thing that should be in there is your battery and and it should the third row and the negative in the fifth row on a kind of stretch across one of the holes so it goes from three to five positive negative and if we were to take our and then we should take the negative and of the battery and if you look at it it should be the one that has a few holes in it because it should have like two other holes in that row so you put in one of those really really nice and i like about him i actually just did something to that mine but the thing about him that is really nice is and i think that surely when i think the one nine hundred eighty s they changed the type of l e d s used to the color actually succumb from the case but now it actually comes from the semiconductor of the the elling the inside and it the color actually depends on the elements they use that the compound of elements they use to make that color so so the difference that you have is the voters that ellie do uses so far we're going to do a simple circuit and i wanted to and we're going to do another experiment another time to talk about that because one of the things you can do  voltage of the battery but it's a simple thing but the thing about it is that the color of the l e d all have different voters so for example i'm using blue the blue goes between two point eight through volts and von has i think yellow and yellow is one point eight to two point two votes which is no less voltage which is nice so now we're going to go back to but i don't want to go off so much we're going to add our we're going to add our resist or so the way i'm going to do that  to actually disconnect my positive in and i make sure i have a good connection here let's keep on doing stuff and moving it around the bed and then i'm going to take my resist or and i'm going to take the resistor and i'm going to put it in the say row as the positive leg of the l e d which is that row which is story so if i put this in row three one in the resistor and it doesn't make a difference which night then if i take and so then if i take my positive and that goes to the battery and i put it in the same row as a resist or which is row one so once the resist across one and three the positive end of the elysee went in to three and the resistor went into three and the other in other is a goes into one so i have to put the positive in the battery connected to one and the current flows can go from the the resistor to the l a p d and back so it's a little it's not as bright you can't tell too much and i the pieces together but i use them because i want my kids to take them home and they're not that expensive and it's a nice project to take home in and i think because they have their own light they call it a night like so we're going to take the same thing i'm go move everything down so i'm going take my l e d and i'm going to move it down to the other end of the and move down sam and put my positive so i take i'm doing my positive here so i have one two three four five six seven eight nine nine nine is the role that i'm use and what my positive head and and that's nine and seven is the one which my negative so if i was to take this and just check it to make sure i have everything right i should be able to just do this and of course i don't have a right th k so the thing about the switch that bond didn't mention is that this which is what we call a single pauls a mobile that will grow and we're going to another experiment i shows what i mean by that with the switch so but we're using the switch as on and off so when he talks about it even though has three you see the three terminals that are taken out you're only using two of them use the uses the blue one when i'm using blue i don't put another l e d with it because i know that the voltage required for my blue l e d is two point eight three vote and i just have three volt battery so it's with the color they get the color farm a compound element so that's how you get the different colors and i always like to go to what in each one of them and then go to my element look to see which  elements are because that's what they do to actually create a nice beautiful color and as i said blue is my favorite so and wants to try and do that so we are actually going to move on to something else in a few minutes if he doesn't get it so still in that i'm going to say we're going to start talking about our next experiment the experiment with him to do it without actually test the resistors and the resistor sizes  same rows as the one previously why wasn't working for us because there's too much overall voltage and when i mix together only one could light so didn't work for both of them so i had a good the read which is low voltage or wrong so he has the red and yellow and red when you look at the vote it's just that whatever the elements are used to create red it's a one point nine to two point one votes and the yellow is one point eight have different the stripes or the means how many ohms they are and i have then if you look at this chart that i have here and this chart shows you actually the  this shows you the ratings for the resist are with these rings that tells you how many alum so you can actually go through the chart and look at your resist or and tell you how many ohms every sr is best with you don't have that but most of the time you buy resistors let you know great way of introducing resistors to the kids so they understand the whole concept how it limits the amount of current going through that circuit and so if you look at the red one it's pretty bright the yellow ones keep a still bouncing you can see th give you the different colors when they used to have the case and used to be the color actually used to have like i think was red and maybe yellow and maybe cream i can't remember but they used to have just a few different colors of the  celebes and now they have all these beautiful colors and all the beautiful colors come from different elements that she put together so in this circuit is very similar to what he just dead but what we're going to do is we're going to use this which is they're using a switch to do on on and off by we talked about because i said this which is the single pole double throw which we're going to use both sides of the switch and we're going to put one resist or which has a number of arms to it and we're going to put another resist on the other end that has a larger number and we're going to look at the same l a p d and see what happens and it's the same thing they're bonded is going to be he's playing with it so that's what we're going to our next one but before we go i just want to make a comment again about the the book that i just purchased called elements books and we're going to do more about it i'm going to bring it with me  while we're doing electronics and probably i have another battery experiment that would probably use it for actually use it for a lot of minds because this book is so great because of all the elements and when you are doing anything  stem as applies to the engineering component that i do because i work with stem science technology engineering math but i always work on the engineering component of it so my students they do electronics they do mechanical engineering with a lot of things we do of silver engineering they do a lot of more engineering type programs and when i do those projects and programs i talk a lot about elements that we use and  like tricity since i'm alleged engineer by degree i talk a lot about electricity and how we use that because you know i think that's the foundation of any of these things and without that and with that we think they won't work so we need that so we're so if you put it in i can see from here so wildcards doing that we're going to wrap up and talk about we're going to work on this electronics project next week where we talk more about the resistance and then i have an actually the switch of this is going to a combination of how different which works with the resist interested in to talk about how that works what current is going through your circuit and we are going to build another electronics and then i think that would be our last week electronics so i like to thank you so much for joining us n