Picture of Make your own Magnetic Stirrer 2S
After doing the first and the second version of magnetic stirrer, I thought that could be a good idea to make a 2s version.
I redesign it to make it simpler to use. Also it is more stable that 2nd version. 
You can use it however you want. You can blend your tea or coffee, and because it's also portable you can take it wherever you go. 
It is lighter and the only thing you need to make it works is a 9V battery. 
You can also use it in your chemistry lab.
I hope you'll like it!

Step 1: Materials

Picture of Materials
Most of my materials are recycled so don't forget to keep your old devices to salvage useful parts.
- 3x2 cm perf-board
- a LM317 Terminal Adjustable Regulator (recycled)
- wire (preferably colored)
- 1 red LED (preferably super bright)
- a 5KΩ potentiometer
- 1KΩ resistors (recycled)
- a 240Ω resistor(recycled)
- a 10µF polarized capacitor (recycled)
- a 0.1(100n)µF capacitor (recycled)
- a panel mount 2.1mm DC barrel jack
- a CD-ROM(DVD-ROM/RW) geared motor (recycled)
- a 9V battery clip
- a 9V battery
- a 12V DC power supply with 2.1 mm jack
- a 1N4007 diode
- a CD case for 20 CDs (recycled)
- a black paint spray
- varnish
- a round piece of steel
- a round piece of glass(bigger than the case's diameter) (recycled)
- shrink tube
- 40 cm of plastic hose (0.5-0.7 cm thick, preferably colored)(recycled)
- solder wire
- 4 x 3mm screws(recycled)
- 4 x screw nuts(for 3 mm screw)(recycled)
- 1 x 4mm screw
- 1 x 4mm screw nut
- a small cooling radiator(you can get it from the processor of a video card)
- easy slide pads
- 2 x round classic magnets(recycled)
- 5 x 3 mm thick round magnets(5 mm diameter)(recycled)
- superglue

Tools needed:
- Cutting tools
- A drill
andrew.spencer.2 made it!1 year ago

Cheers for the great instructable, clever idea, it works a treat!

IMG_0194.MOV(360x480) 17 KB
andreyeurope (author)  andrew.spencer.21 year ago
I'm glad you like it. Thanks!
Moltenink2 years ago
You could save yourself A LOT of effort by just gluing the magnets to a CPU fan and then attaching that to the Potentiometer. Then as a power source use an old cell phone charger. BAM stir plate.
Oh yeah and if you need some magnets, take em out of an old hard drive
andreyeurope (author)  Moltenink2 years ago
First, I have tried to work with HDD magnets, but they are useless for me because they are multipolar.
Secondly, the magnets can affect the fan. By the ways, this CD-ROM motor uses less than 2 V to work so it's more efficient than a fan.
Thank you for comment.
jaquale2 years ago
can buy one of these from u.
andreyeurope (author)  jaquale2 years ago
You mean if you can buy a stirrer from me ? I think the biggest problem here is the shipping.
andreyeurope (author)  andreyeurope2 years ago
The magnetic stirrer cost almost 10 $.
Verdann2 years ago
Think it would be possible to increase the size on this to work in a five gallon water bottle?
andreyeurope (author)  Verdann2 years ago
I think it could be possible if you increase the size of the magnets and the power of the motor. And you need a bigger stirring magnet.
These magnets would be much better stirring a drink that you might drink.


I know. I have searched for this sort of magnets, but unfortunately I am not living in USA or UK so amazon for me is like a dream.
pjnec2 years ago
Andreyeurope, nice work here!

I was just looking to solve a problem with water circulation in a diy sous vide setup and this might be a viable solutiion! Current circulation methods in diy setups use in-line water pumps or air bubblers which in my opinion are not as effective as this!
andreyeurope (author)  pjnec2 years ago
Thank you!
phmanzano2 years ago
Very interesting, voted.
andreyeurope (author)  phmanzano2 years ago
Thank you!
I absolutely love this idea, simply because of the amount you recycled! You have my vote.
andreyeurope (author)  Ironsloth19932 years ago
Thank you!