hey guys I'm here today to show you how I've made this magnetic stirrer hot plate now if you haven't seen my video on how I made that magnetic stirrer I'd recommend watching that one quickly to get an idea of how the mechanics work what I've got here is a very similar thing to that magnetic stirrer you know we've got the PC fan underneath with the magnets on top but what I've done here is I've actually cut the corners of that PC fan off just so I can have it fit snugly in the bottom here now that's a 120 millimeter fan in the middle here I've got a paper clip glued and centered as always with one of the wings of the paper clip just bent out and soldered in also centered to raise the magnets up and below the surface of my hot plate so they can get a good grip on line stir bar i superglued my magnets in just give them a good base and here's our hot plate now what I've done here is I took a kettle very similar to this one here and took off all the screws and remove all the plastic from the sides and the bottom and took off all the components that are in there so I'm left with just the element and I left the LED in there as well just so I know when it's heating after I did that I used my Dremel and using a cutting bit I went all the way around the edge and cut a wall maybe about an inch and a half high just so I can have some sort of a fluid in there when I'm heating whether it be mineral oil or water so the heat has somewhere to go because otherwise we might end up damaging the metal or the element which is not a desirable outcome actually what I have here is a little voltage for the base which I took out and left me with a great hole in the bottom there for my magnet to fit through and carefully just sliding that in and then gluing a base and the hot plate together we have a perfect magnetic stirrer hot plate now for the variable control what I've done is I have this digital voltage controller and that's just for the I'll heating element and that's just to control the power going to that and how hot that gets here I've got a variable voltage adaptor which powers my fan and allows me to control the speed that my fan spins at and here I've got my main power lead this is coming directly off the main power lead and that's because I don't want my element control to actually control the speed of my fan as well so I left that out for now these are all going to be different depending on which one you order and where you get it from so you're gonna have to look at the wiring diagram for your specifically but for mine the live wires go on to the outside and I've got this digital thermo controller here which goes from 0 to 100% throughput and that controls the resistance that is given by this and therefore the amount of power going to my element okay so here we've got a beaker I mean you could use anything you don't have to use an eco necessarily we're just filled it up with some water which is actually already heated a little bit because I've done quite a few takes just to get a perfect for you guys and a nice temperature probe to tell us how hot sorry this is a little bit fidgety perfect great okay so let's just plug that in and see how it works right so we're about 20 percent to foot right now and let's just take our fans we've down a bit we can take it all the way down to three volts spins very slowly or all the way up to 12 volts but we'll leave it at nine for now here our element is feeding up slowly but we'll take it up to 50 percent but just to see how much faster it beats off I won't take it all the way up to a hundred percent so don't let my water has started boiling with all these electrical elements around I'm going to make it pretty later so 50 percent you can see heats up quite a lot faster believe it a 24 now and that's us guys that's our magnetic stirrer of hot plate with variable temperature and speed control for my next project I'll be doing a ball mill and for this next video coming up I think I'm going to be videoing the process of making it as well so it's easier to follow and understand how I've done that and as always like subscribe and comment and have a fun project guys