Hey, I'm Matti and i like my Chocolate milk cold

Mixing fluids or fluids with solids can be easily done with a spoon or insertion blender, but what if using a spoon takes too long? What if the liquid is corrosive? What if you dont want to clean up all the mess, what if you want a stealthy way of mixing

Anyways, this product already exists, it's called magnetic stirrer and can be bought off aliexpress for around 15-30€

it works by having a magnet spin under a surface, it can be a piece of plastic or even your own kitchen counter top. Then another magnet (bar shape) is placed in your glass of choice with the liquid you want to mix. The magnets are usually covered in PTFE (teflon) so dirt does not even want to stick to it, no matter how messy or aggressive your liquid is it will just flide off and can be just washed off under tap water easily. (excluding things most people don't even know the names of)

why am i reinventing the wheel? most of the designs suck, power supplies are weak, the motor has barely enough torque and the magnets are usually cheapest kind than can only support small stirr bars. For better models you are paying 3-digits

Oh should any part break you are forced to buy a new one

Should you want your stirrer integrated in your kitchen countertop you care most likely out of luck

This is why i made my own, requires a 3d printer or a 3d printing service 2 magnets, a BLDC motor and driver with power supply, all can be easily bought online for 30-40€ giving you a better quality, you can't actually compare it, it's in another league

The design is above and all the plans, description, tutorial etc will be released soon

The red part houses the 2 magnets with flipped polarities

the middle part houses the BLDC motor and there are holes for the cables etc, also both halves are screwed together using cheap M3 screws

Naturally, all holes which accept screws have metal inserts

Where does PCBWay come in?

putting ferromagnetic metal on the bottom should boost the magnetic field on top by redirecting it upwards

Other manufacturers don't offer mild steel, or they want roughly 3x the price.

Making the spinner (red part) out of mild steel should redirect the filed upwards as well as it would be possible it make it a little bit lower profile (slimmer)

I can assume it should boost the magnetic field by 20-120%

It's not required by the project but if one wants even more power or even smaller profile (so far it's 4.4cm) the possibly making this part out of iron would be help

p.s i plan on mounting this under my kitchen worktop, so when i decide to enjoy cold chocolate, i can just drop in a stirr bar, hit a secret switch and let it mix for few seconds untill all of the cocoa powder dissolves into the milk

more details will be released once the mechanical/structural part is done

p.s.2 i lack the funding but i possibly could figure out how to make this into a hot plate stirrer...

p.s.3 the thumbnail is 1.5L of water beeing flung all over by the stirr bar, this magnetic stirrer eats 1.5L for breakfast

• DIY
• 3d printed
• rotation
• 3
• rotationm
• stirrer
• magnetic
• magnet
• spinning
• water
• cooking
• kitchen
• chemistry