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After I've published the first instructable about how to make a magnetic stirrer and after the constructive criticism I've got, I decided to make a new Magnetic Stirrer, an improved one.
Then I start the research for what materials should I use for it. I make the circuit, the design of the case and then I assembled it.
I hope you will like it, and by the way, you can also use it in many ways.

What did you make?
I made a Portable Magnetic Stirrer that can be used in the chemistry lab, home or everywhere you want yo use it. It is more efficient and it has more features than first version so as it would be a pleasure to use it. As I said above, it could be use in many way, not only as a magnetic stirrer. 

How did you make it?
Making it wasn't very hard, but to make one you need patience and time, patience for possible errors that can appear during you make it, and time for work. I started searching for a case for it, not too small, not too big. Then I continued seeking for a geared motor, which is little and efficent. After I've got it, I search for a metal disc and some strong magnets. When I finished getting all things I need (you will find a materials list next step), I made the circuit, I chose a design for the case and I painted it.

Where did you make it?
I made it home and at school, during breaks.

What did you learn ?
By making this project, I learn that almost everything can be recycled and reused for other porposes, like my project. Almost everything piece of it was recycled. The geared motor is from an old CD-ROM, the case is a CDs case...It was a bit tricky to make it customisable, but not impossible. And it was a challenge for me to make the circuit as small I can.

Let's start the work.

Step 1: Materials needed

Materials needed for the circuit:
- 3x2 cm perf-board
- a LM317 Terminal Adjustable Regulator (recycled)
- wire (preferably colored)
- 4 LEDs (preferably super bright and colored)
- 4 female connectors
- a 5KΩ potentiometer
- 3 x 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

Other materials needed:
- a CDs case for 20 CDs (recycled)
- a black paint spray
- duct tape
- a round piece of steel
- a round piece of glass(bigger than the case's diameter)
- shrink tube
- 20 cm of filled transparent plastic tube(0.3 cm thick)(recycled)
- 40 cm of plastic hose (0.5-0.7 cm thick, preferably colored)(recycled)
- hot glue
- solder wire
- 8 x 3mm screws(recycled)(one screw with 2.5 cm height)
- 5 x screw nuts(for 3 mm screw)(recycled)
- a small cooling radiator(you can get it from the processor of a video card)
- easy slide pads
- 2 x HDD magnets(recycled)
- 5 x 3 mm thick round magnets(5 mm diameter)(recycled)

Tools needed:
- Cutting tools
- Hot glue gun
- A drill

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<p>Here's a video of mine in action :) thank you so much for your guide, it'll be part of a greater home-science project.</p><p> I attached the video, but here is the youtube vid:<br><iframe allowfullscreen="" frameborder="0" height="281" src="//www.youtube.com/embed/rJ0LTiQ0Oh0" width="500"></iframe></p>
<p>Well done. Nice job.</p>
<p>You saved me 200dollars and it was a lot of fun :) thank you!</p>
I'm glad you like it. An upgrade would be a PTFE-coated magnetic stir bar, because regular neodium magnets don't resist ti high temperatures and chemicals.
<p>Wouldn't the teflon coating scratch off when spinning at high speeds?</p>
Please make me one and let me paypal you for parts and labor. I want one but building it is a little past my abilities. I need one for mixing e juice. I mean is it powerful enough for that?
<p>It depends on the magnet you use. You need a strong one so the magnetic stirring rod doesn't fall behind while it's moving through that thick VG. It needs to stay perfectly aligned with the magnets on the motor or it will get thrown off. Best to use a hot water bath so the VG is more fluid and it mixes faster with the other ingredients. I am currently designing a combined solution for this that I might sell to other e-juice manufacturers if you are interested.</p>
<p>Hi,</p><p>When I place the magnet on top of my 5v DC computer fan, it stops the fan spinning?</p>
<p>It shouldn't. I saw on youtube a lot of people making magnetic stirrers out of computer fans and magnets.</p>
<p>I was very surprised myself, as I also have seen other people using this technique with no issues. I wonder if it is the magnet or the fan design. The magnet is a N52 grade Neodymium Magnet NdFeB. The fan is a 5V Computer Cooling Case Fan 8025 USB 8CM Fan 1300RPM. The magnet will stop the fan when it is within 2cm, does't even need to be touching the fan. Any ideas gratefully received. Maybe the fan is driven by magnets and the poles are interacting.</p>
<p>I'm glad you like it so much, but unfortunately I made this device years ago. Now I'm studying ICT Engineering and taking a break from building devices. It's really easy to make one, you only need some scrap electronic parts, some basic knowledge about circuits and a little imagination essence.</p>
brilliant design and i enjoyed making it. few questions though. there wasn't too much explanation on the diagram and how you constricted the circuit. Maybe you can mention important points like pointing components in the wrong direction? although we can see which components run in series and parallel but just to mention that as well.
<p>that's amazing - great work! I want to make one now myself. Thanks for the detailed info and pictures too - very appreciated!</p>
I'm glad you like it.
Nice, tight, efficient design. <br> <br>I particularly like your use of as much recyclable material as possible.
I hope that you're not the only one who like my project.
Thank you.
Much better than previous! Well done, Andrei! <br>That's the way: make something that work, then make it better! <br> <br>Two small corrections: the diameter of &quot;filled transparent plastic tube&quot; is 0,3 cm and the diameter of &quot;plastic hose&quot; is 0.5-0.7 cm. In your text this dimensions are too small.

About This Instructable

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Bio: I enjoy making things by myself, trying to make this world better.
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