HOMEBUILT PID CONTROLLED HOTPLATE & STIRRER - TEARDOWN - ELEMENTALMAKER

Today we're tearing down the hotplate/stirrer that I built may years ago using a PID Controller and some other odds & ends. Parts list down below! (Amazon Affiliate links that help support the channel)
PID & SSR: amzn.to/2JSQlaQ
2X 400W Heating Cartridges: amzn.to/2JQxFZb
12V Circuit: amzn.to/2qBofYw
PWM Controller: amzn.to/2ESlZkP
Aluminum Plate: amzn.to/2H4fEZB
Please don't forget to subscribe and support the channel on PATREON! / elementalmaker

[@oliverladykillerbiscuit]

Thank god I found this video, I was about to buy one of them crappy chinese hotplates those that can't even boil water. Thank you you're a lifesaver man!

[@xxakli]

Ditto!

[@buckstarchaser2376]

What I've found since studying chemistry is: You can buy an affordable hotplate that heats. You can buy an affordable stirplate that stirs. You can't buy an affordable device that does both well... Looks like I'm going to have to do it the homefassioned way.

[@shazzz_land]

have you managed to actually do one for you?

[@buckstarchaser2376]

@@shazzz_land Of course not. I'd have nothing to bitch about if I did.

[@thombaz]

@@buckstarchaser2376 We just love bitching so much.

[@JustAnotherMaker]

Love it! I used a near identical set up, minus the stirring, to turn a rice cooker into a sous vide water bath. It’s taken me back a decade and filled me full of nostalgia and made me want to dig it out again.

[@ElementalMaker]

Glad you enjoyed! Sounds like some fun memories! 👍

[@Flederratte]

Cool construction. I am thinking about making a magnetic stirrer myself. Now I know, it can work with just a DC motor and some magnets. Thanks for showing the video.

[@designworksdw1949]

Cool vid always love diy as well as control its why i became an instrumentation mechanic. 4yrs of school and pid controls still gives me a headache at times expecially when you are riding on the bleeding edge of proportional on a new gas well getting it to control as it is bucking up water. Always good fun.

[@ElementalMaker]

They are fun to play with! I have another awesome project in the works that I may use PID controls with. Keep an eye out for it!

[@learningthehardway6186]

Good to see you in my feed again! I think I might try this as well, cause I too am faaaarrr too cheap to buy a proper one.

[@ElementalMaker]

Glad you enjoyed! I'll hopefully be able to get videos up more often now that we're settling in to the new house. Keep an eye out!

[@joeestes8114]

Great video! Tha.ks for sharing!

[@tek4]

I really enjoyed and this gave me something to think about, since I am setting up a pid soon for my toaster oven/annealing thing. I have the pid, but been lagging on actually setting it up

[@ElementalMaker]

That'll be a great project! Keep us updated on it! Ill probably do something similar in the near future as well for my knives and heat treating parts off my cnc.

[@bunyslayer]

Thats fantastic

[@barriehemming1189]

great video man..

[@gregsmith7023]

I had the fan idea all set but the heater part was a problem. Thanks to this vid', no more. Thanks.

[@ElementalMaker]

Glad it helped you out! Thanks for the comment and checking out my channel!

[@charlesdorval394]

I did learn something. Forget about replacing the relay in my current project with an SSR :P Quite a nice project :)

[@ElementalMaker]

Thank you!

[@3er24t4g1]

Very good comrade

[@ElementalMaker]

Why thank you Mr. Stalin

[@3er24t4g1]

I prefer comrade Stalin

[@ElementalMaker]

Stalin did nothing wrong my sincerest apologies comrade. Please don't send me to the Gulag.

[@andyadamczyk8083]

This is some great work. I am trying to build hot press 100X200 -100T. Do you remember how long coils did you use?. Thanks

[@temlan3042]

I plan on making the propane tank foundry, how much of the 5lbs of satanite did you use?

[@PL4GU3d]

Cool idea, love the PC fan and magnet idea too lol. I need to learn a bit more about PID’s and ect. But still interesting nonetheless thanks man

[@ElementalMaker]

PL4GU3 Gaming glad you enjoyed! Pid control itself is super simple to understand, and the circuits are easy to design. Alot of fun to play with if you enjoy tinkering with electronics

[@PL4GU3d]

ElementalMaker you bet I do, I’ll look into it, thanks man!! Loving the vids and love the chemistry vids too!!

[@jasonsummit1885]

Had absolutely no idea what you were talking about, but it was interesting.😂

[@ElementalMaker]

Glad you enjoyed. Its actually super easy if I were to show you the wiring diagram (it just looks like a mess in the box), and if your looking at build something similar just let me know any questions you have.

[@Demymaker]

I wanted to build something of the genre but which ranks not too high temperatures (max 70-100 ° C) and of size similar to yours ... I had thought of an PTC (Aliexpress) heater that is basically a ceramic resistance ... .. the problem is that I should insert it on one side to leave the center free ... thoughts about this? I will not use a PID but a simple on-off digital thermostat (W3230 or similar)

[@OldSaintNick007]

Dose ElementalMaker have a wiring diagram for this project? Preferably one with the safety stuff he was talking about?

[@IlusysSystems]

Nice! I was planning to do similar video, only I wanted to utilize boiling kettle heating element. Those in EU came apart very well, 1kW of power, cheap, and sexy(pressed stainless sheet ca. 0.8mm with heating element overcast by aluminium blob) I was figuring in my head, how stirring should work. so I have few questions: Does stir bar magneticaly couple with fan rotor strongly enough(does it slip)? Do you know fan power and RPM rating? is it powerful enough(if you can compare it to commercial hotplates)?

[@ElementalMaker]

I am probably one of the few americans to own one of those electric kettles. I cant drink coffee, so I love a good cup of Yorkshire. That would be a great application for PID control! The stir bar is not actually coupled to the rotor of the cpu fan. The cpu fan rotates, and the aluminum heatsink epoxied to it in turns the hard drive magnet (also epoxied to the heatsink) just below the surface of the aluminum heat plate.

[@GRBtutorials]

Yeah, that looks like an interesting way of making one of these. My plan is to put a magnet on a motor below it, connect it to an Arduino with a screen and two encoders, an SSR, two temperature sensors and a temperature switch to turn it all off if the SSR fails closed.

[@DesignedbyWill2084]

No ground and switch on the neutral, cool!

[@ElementalMaker]

William Wilson tell me about it. This was built before I took my electrical engineering courses so it was a bit botched, but hell it works. I'm putting in a new cord with a ground to make it much more safe.

[@trcostan]

You should stick the alarm output across a relay if it powers up it will kill power to the project?

[@ElementalMaker]

Very solid idea!

[@TabletopMachineShop]

Ok, hopefully you take this as a compliment, but you are like a perfect mix of Abom79 and AvE. It's uncanny. I subscribed.

[@ElementalMaker]

Tabletop Machine Shop thank you sir! I love AVE myself. Haven't seen Abom79 and will have to check out their channel. Thanks for subbing!

[@ElementalMaker]

I just checked out Abom79's channel. Man that guy is one talented machinist. Wish I had a hundredth of his skill level in that department! Thanks again for sharing and checking out my channel

[@HYX_INDUSTRY]

Could you use the controls for a toaster oven as your temperature control cause i see a lot of them for $10 at good will sometimes, even $6.

[@shadow4280]

Any thoughts on a PID controlled gas burner? I've trying to think one through for a still.

[@ElementalMaker]

Should definitely be doable. You can integrate an arduino to function when the pid turns on to open the gas solenoid, and run an ignitor for say 5 seconds.

[@xxakli]

Awesome video! Am going to make my own CS and have been watching a ton on vids on that and was looking for a reliable heated stirrer but everything was so sketchy and expensive. I followed this link you posted: 12V Circuit: @t but said not available so I searched Amazon for another one and wall-worts showed up. is that a viable option? Much appreciated, subbed & rang the bell. Gonna ck out your other vids as well.

[@matthewvause4261]

how much liquid could this stir im after doing one for 5ltrs

[@HealthThroughNutrition]

Can you please answer a few questions about your stirring machine? Can it be made larger with a lot more power and could it be made stable and balanced? Thanks.

[@HealthThroughNutrition]

Yes I'm subscribing right now and this video gets a huge thumbs up from me because it's really helping me to understand a lot of things I thought I was correct about but now am certain. Thanks very much for this video and also for answering the questions if you have the time. Thanks again (Daniel)

[@freddiejohnsonjr503]

What did you use for the stirrer motor? And thanks for your help, I thought it was really nice setup you have.

[@hartschteiler3363]

Looks like a simple papst-cooler with a few magnets on.

[@Lvl18Meep]

A computer fan

[@freddiejohnsonjr503]

Wow. I would like to make one for those for my E-Juice mixing. Where would I get the parts to make one?

[@ElementalMaker]

I linked to some of the primary components in the video description.

[@freddiejohnsonjr503]

@@ElementalMaker Thanks. I caught after I posted my message

[@eulamaeaquino1494]

im so sorry for being stupid but where does the switch connects?

[@IchMagandMeGusta]

Just going through your playlist makes me wonder what all you have in your lab. Have you ever considered just doing a lab tour? You do you, obviously, but it would be cool to see what another tinkerer is working with in their lab.

[@ElementalMaker]

Great suggestion! I have thought about it and definitely need to do one some day

[@svenDuke1]

Smart and esy

[@FedericoCipriani27]

Do you think this can be used to boil flammable solvents? I mean, do you think this can be considered "explosion safe" grade equipment? Cheers,

[@ElementalMaker]

While there are no visible sparks or open flames, the main switch, and the pid controller could possibly create sparks. I would not use this somewhere explosion proof equipment is called for.

[@FedericoCipriani27]

@@ElementalMaker Now I'm thinking to pull hot plate/stirrer end from the PID and power supply enclosure at least two meter away... Thanks for replying.

[@Dom-nt4gn]

It would be cool to make a series on home made lab equipment made as cheaply as possible while maintaining a small margin of safety. Seems like you are half way there with all the stuff you have made lol.

[@ElementalMaker]

Dom675 that's a great idea! As you said, I already have a good bit done. Thanks for the comment and checking out my channel!

[@ham8654]

What educational degrees do you have? What were your studies?

[@theodorekorehonen]

I really would like to make something like this but I'm confused as to what you use for the power supply? I understand you need something capable of 1000w considering both cartridges and the motor but I don't know what to call this power supply when searching for one on ebay or amazon. Edit: Or does the PID also act as the power source? As in you plug it into the wall and you're good to go?

[@ElementalMaker]

Everything but the fan motor runs off 120vac. The pid has a 120v AC input, then it switches the ssr, which simply clacks on and off to control power to the heating cartridges, which are in parallel. For the fan motor I just put in a tiny 120vac to 12vdc board and then the pid to control the fan.

[@theodorekorehonen]

Thanks so much. Electronics are not my strong point but that makes everything clear!

[@ElementalMaker]

Happy to help Theodore! If you go ahead and build one, feel free to contact me with any questions.

[@alockworkorange7296]

Hey im.trying to build a hot plate stirrer why did u use a PWM instead of a potentiometer? I asked my lil brother (whos an electrical engineer) what i should u and he said hed use a potentiometer but his work and education is mostly in elextrical feild in high voltage/power feilds and aws tensor flow and programming for that

[@ElementalMaker]

PWM is much easier to control than just using a pot. It also allows it to operate at much lower speeds as well.

[@theodorekorehonen]

Hey just thought I'd let you know there is now another of these (or at least similar) in existence. I was wondering if you had any problems getting your stirrer up to a high enough speed though? When I made mine I used round magnets and since they're symmetrical all the stir bar would do was stand vertically in the center.. didn't think that one through. I'm fixing that now, but even before with the old one on it, the motor didn't really want to spin up until I turned the pot at least half way up, and it didn't top out very high. Since I don't have a lathe i made a heat sink with a 2in piece if copper pipe rammed with Al foil inside and jb welded a 8 fins on with Al bar stock (maybe 2 x 1/8 x 3/4). I think maybe it was too heavy for my fan (which I also cut the blades off of). When I get my rectangular magnets in I will try with just the pipe and have the magnet sticking out on one side to see if that will make it spin. I could only get a 6 x 8 plate as well so might have to upgrade the cartridges. But I just wanted to say thanks for making the video otherwise I probably would've never thought to make this for myself! I'll send you a message when mine is finished

[@ElementalMaker]

Awesome! Glad to hear someone else built one! Using the hard drive magnet I get pretty solid magnetic coupling. Plenty to stir any solution I've worked with even with reasonable amounts of precipitate it continues stirring. It can go fast enough to make the stir bar go flying. I think you'll have much better luck with the rectangular magnets. I think the 800W worth of heating cartridges will be plenty for your plate. They are quite overkill for my setup, but with the PID control it doesn't really matter.

[@theodorekorehonen]

@@ElementalMaker how long does it take for yours to heat up and about where does it max out at? I'm testing mine to see how long it takes to get to 225 c and I've also got a beaker with about 400 ml of water to see how long it takes to bring that to a full boil from room temp-24.6c

[@ElementalMaker]

@@theodorekorehonen the plate heats up quite quickly. Maybe five or so minutes to get to 300C

[@theodorekorehonen]

@@ElementalMaker hmmm that is definitely not the case with mine, my plate is bigger but not that much bigger. Do you think running a 220v cartridge through the ssr makes a difference (since I have 110)? These are the cartridges I purchased: www.amazon.com/dp/B06XWBZS3N/ref=cm_sw_r_cp_apa_StKTBbEDWN4Z3 Edit: as of now it's taken about 13 min to go from 50 to 105

[@ElementalMaker]

@@theodorekorehonen yeah that's way too long. Did you use a thermal paste in the heart cartridge hole to ensure good thermal conductivity to the plate? If not that's probably the issue

[@dragonslayerornstein387]

Flexing that Freedom 'eh?

[@GRBtutorials]

Couldn't you just insulate the aluminium plate? It'd fix your PID problems, have higher efficiency, and the magnet would be cooler. Also, you could try adding a safety temperature switch, just in case the SSR fails closed, they're quite cheap and easy to install.

[@normellow]

Exactly a thermal switch! Hopefully he sees your comment.

[@djdrack4681]

240? You must be in the EU then right?

[@ElementalMaker]

Nope it operates on US 115 60Hz. The PID controller works on either voltage.

[@truckingjourneys]

I'm running out of videos I need 11 hours worth of new video every day can you do it?

[@ElementalMaker]

Haha I wish! Glad you've been enjoying all the content though!

[@simonhoey6575]

Do I spy a C5?

[@ElementalMaker]

Damn good eye sir!

[@VerbenaIDK]

i am cheap, so i think ill try to take a cheap electric stove and add stirring and some temperature probe, i am not paying 1400 for a basic ass stirrer

[@ElementalMaker]

I did the same thing my first attempt. I eventually landed on this design after using the PID controller electric burner for some time.

[@nathank4708]

PID's are a bitch. The ones I delt with took 24 hours to settle out.

[@ElementalMaker]

Holy crap that's insane! How large of a thermal mass were you heating? I never had that kind of issue. This one always settles on the right temp within a few minutes.

[@Druicidal]

You don't want to trust the autotune function of an ali-e control anyways.

[@tdfpublic886]

Another How To that is not a How To.