Stir and heat. It's (sorta) simple
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- Опубліковано 7 вер 2024
- I build a fully programmable magnetic stirrer hotplate. Spinning magnets stirring water vortices, and Mac and Cheese, what more do you want?
3D print files, diagrams and Code for the project will soon be available at TenTries.com/projects
What would you do to make this magnetic stirrer hotplate better? Comment below!
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Nifty! I would want a PTFE coated temperature probe though, putting steel in certain acid mixtures would not turn out well.
Thanks. This is very useful video
Glad to help!
How would I make it better? I would stir it with a spoon. Lol.
I did see a guy who used a fish tank bubbler to mix the different temps in a huge water container. The method just just depends on what your using it for. For chemistry, yours is ideal. For holiday sauce, 🥄.
Don't follow the recipe for Kraft.
Only boil the macaroni for 3 min then drain and flush with cold water until all the noodles are cold.
Throw only the butter in the pan on medium and melt it (optional, but you can up to double the butter). Add powdered cheese to melted butter and whisk until the powder isn't dry and lumps are gone.
Add double quantity of milk to pot and whisk on high; low fat and skim milk contributes too much lactose and makes the Kraft sweet, this can be offset with acid (lemon, vinegar) or by using whole milk or preferably half and half or even cream and adding water if necessary. Cook and whisk constantly until reduced by half at least.
Add drained cold noodles back to pot and finish cooking noodles in cheese sauce until noodles are your preferred level of softness (firm is better), more cooking continues softening noodles.
For extra credit; throw mini cocktail sausages/lil smokies in a frying pan and heat on low until outside is crispy, and toss a few while they are still hot on top of your bowl of Kraft. Top with shredded or shaved cheese of your choice, and hit with blow torch or broiler to melt and even slightly char cheese.
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Hello!
I want to build a stirplate + low voltage warmer foil. My question is does the moving magnet generate eletriciti in a heating foil? Is that a problem, what do you think?
Cool vid.
How about powering coils, that attract and push the magnet instead of using a motor?
Maybe something like a solenoid but then the cores are only diversing the flux.
This way you wouldnt have any moving parts in the machine itself.....
Basically the flo becomes the rotor and the stator is placed "conveniently".
Would that take you 10 tries?
I'm trying this at the moment; basically an axial flux bipolar stepper motor. I was not able to source SmCo magnets locally; Neodymium magnets shouldn't be operated above 80°C. Finding soft iron cores was a challenge so I made do with a stack of 'I' lamination plates from a transformer; magnet wire from the primary winding. U shaped magnetic cores would be best, but it a bit of a challenge for them to cross over each other without some sort of offset. So far I was only able to reach around 500 RPM with about 15mm of clearance from the coils to the stir bar but back iron between the coil pairs and fine tuning of the coil positions may improve this if the coil inductance isn't a limiting factor. A basic stepper motor driver works well for this.
I'm thinking about doing a very similar design but for a mag stir mantle! And I want it so I can change the heat mantle and keep the stirrer for it for the next size mantleN I have this high temp heat tape that I have ordered but need to work out how the lid controller works!
Great video! Would you be able to post the wiring diagrams please? Also, would milled metal parts work well instead of your PLA casted parts? Please and thanks!
I'm realizing that this video has been up almost a year and I haven't drawn the diagrams yet 🤦♂️. I'll get those done today and reply with a link!
@@TenTries Any updates? ill be very happy to replicate this!!!
How far away from the pot is the magnets?
Amazing content! I've been wanting to make my own stirring hotplate for a while. Would you be able to provide wiring diagrams for how you hooked up the heating element? Also maybe for your next one you can make a stirring heating mantle since you're using round bottom flasks.
Sure, I'll send you another message when it's posted. Yeah, I have a mix of round bottom and flat bottom glassware. I considered casting an aluminum adapter for round-bottom flasks, but sticking a control on a mantle would be a lot easier!
1:29, YEET.....
Motor: * spins fast enough to make a cool vortex *
Magnet: "Aight, Imma head out"
I'm confused... are there magnetic stirrer cooling plates? Or is the heating necessarily coincident with the magnetic stirring? I've read that there is slight heating, but also that by stirring and cooling the container's outer layer, you can cool the liquid faster... what gives?
Is there any way to make it whirlpool the noodles so you don't have to stand there and stir? Now that would be cool.. I hate stirring noodles dude..
I would pay money to see Gordon Ramsey react to this....
Same, "This hollandaise sauce is RAW!"
@@TenTries ~THIS MAC AND CHEESE IS PID CONTROLLED, YOU FUСKING **voice crack** _DONKEY_ !~
how did you attach the motor to the heating element?
I cut a hole through the case of the hotplate, so the magnets could sit just below the heating element. Then, I screwed them both to the top board of the box.
@@TenTries What about curie point and loss of magnetic properties.
@@TheTubejunky So the Curie Point for NdFeB is typically above 900C. There's no way to get to that temperature with this heating element without a lot of insulation (I've tried with a similar heating element).
Rare earth magnets do permanently lose part of their magnetic properties above 80C or so. The magnets are about 1/4" below the heating element. Being 1/4" below the element means that there is no conductive heat transfer and low convective heat transfer (bc heat rises). There is some thermal radiation too, but the magnets are coated in a shiny metal (Nickel maybe?). They don't absorb much thermal radiation.
I haven't noticed any loss in magnetism, but the magnets are not too hard to replace. Also, they're not too expensive. So they can be replaced if there's a noticeable loss in magnetism
@@TenTries Wikipedia says the Curiepoint of Nd2Fe14B is at. 310 °C. Samarium Cobalt is at 700° to 800°C but thats a tidbit expensive. 310°C is of course still enough except for the case one turns the stirrer off with the heatplate running or one turns both off with the hotplate on full steam. Then the Heat building up might well get into that range. Nice project though. Easy to reproduce for everybody who by accident has a 3d printer , some microcontroller boards and all the other stuff and knows how to program. The long shaft is a design flaw, will kill the bearings and it is rather untidy. Inspirational.
Thanks! That Wikipedia chart is from another site that doesn't cite its source. The >900C number I got from another site may be wrong, but the curie point isn't really that important. (suppose I could always just stick these magnets in my furnace and set up a test..) What is more important would be the point that the magnets no longer have the strength to rotate the stir bar with the given speed and liquid viscosity for your application. That point is probably going to be a lot closer to the working temperature than curie point, since they are so far from the stir bar. As a commercial or consumer product, I'd change many things including the magnet mount. Also, a small fan drawing cool air, pointed at the magnets could easily keep them cooler for high heating power applications. I hadn't seen a need for this while distilling water for >8 hours constantly, but there could be many applications that could warrant it
Lol, Chris from a month ago!
I normally dont laugh at what most people do but i have to agree that side pop out got me pretty good! That WAS funny!
Hey man can you explain how to program the lid controller?
Tuning PID control is a painstaking process of trial and error. A PID needs to be tuned for the application as all the materials/volumes/components will have an impact. Your best bet is to find a video/tutorial for the rough tuning process to get within a range and then fine tune with repeated tests.
I wasn't even thinking to buy one, they're expensive as shit
😂 True
Would you sell and send a setup?
Probably not, at least not now. Since it's an electrical appliance, I'd want to have it UL listed and that looks like quite an undertaking. Also, I'd want it to pass rigorous tests from actual chemists (not me) before trying to sell it as a completed product.
I will be putting together a kit for it though. That way, it's still accessible to the hobbyist
@@TenTries yeah a kit would be great! Email me when you get to that point.
Ajsgro111 at gmail
Thank you!
Will do!
Is there a list of parts?
Not yet, I'm working on it and wiring diagrams. Once they're done, I'll put them up on the TenTries.com project page. You should see how far behind I am on so many things 😄😅😂
@@TenTries haha, I got your back
I absolutely hate the way you make Mac n cheese.. just.. makes me so sad and hungry at the same time..
Try not making your videos only in 720p so those of us with shitty service can still watch... or dont.. :)
I upload in 1080P60. You're not able to turn down the quality from the gear icon?