Diy magnetic mixer

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When mixing or agitating delicate solutions in the chemistry lab, a magnetic stirrer is often the tool of choice. The build consists of a 3D printed base, containing a simple brushed motor. This is hooked up to a motor controller fitted with a simple potentiometer for adjusting the speed of rotation. The motor is then fitted with a small 3D printed spinner containing two magnets. A similar 3D printed part acts as a stirrer, and is fitted with a matching pair of magnets, and dropped into the solution. The magnets in the stirrer are attracted to the ones on the end of the motor, and so when the motor spins, the stirrer spins in the solution, with no physical contact required.

Diy magnetic mixer

A magnetic stirrer is a handy item to have at hand for a range of applications, including agitation, dispersion, and dissolution. We did some digging to find out and discovered there are quite a few viable options available. While a home-made stirrer is unlikely to give you the power and speed control of professional-grade equipment, it could be sufficient for some applications. An online search will provide you with several different types of magnetic stirrer designs. We take a look at some of those here, making note of some of the advantages and drawbacks of each design. This set of instructions uses a fan-based setup. The main component of the stirrer is an old computer fan with magnets glued to it. One of the trickiest tasks is mounting the magnets correctly. One magnet should have its north facing upwards and the other its south facing upwards. The magnets should be positioned directly across from each other. Because the motor contains magnets, it can be difficult to align the two magnets such that there is minimal vibration when you switch the fan on. Spacers are needed to sit between the fan and the flat top due to the extra height created by the magnets. Something as simple as coins can be used here, but the creator used small pieces of plexiglass, the same material that is used for the plate of the stirrer.

Spillovers are pretty common from mixtures stirred above a stirrer. Report comment. High Vacuum Hack Chat 3 Comments.

This instructables is to show how to build your own magnetic stirrer from parts you may have at home. This one was built to mix E-cigarette vape juice. You could use it to stir almost any liquids, so it can be used for mixing vape juice, mixing for cooking, or in a chemistry lab. Box - anything square ish and preferably plastic in case something comes loose. That is a fan from a donated junk computer. You can use a case fan or power supply fan.

I needed a magnetic stirrer to keep some cells agitated for cell culture, but didn't want to spend the thirty or so dollars needed to buy one. This magnetic stirrer uses an old computer fan and some cheap neodymium magnets with a moldable plastic stir bar. Prepare and clean the fan for use. Your fan may have two wires red for positive and black for negative. If it has three wires, the white wire is a tachometer and is not needed.

Diy magnetic mixer

The magnetic stirrer is a useful device for any home scientist; it is effective, cost-efficient, and is easy to make and use. The DIY magnetic stirrer attracts a lot of attention, but is often disregarded as being too difficult to make, usually because of the potentiometer used to control stirring speed, and the challenge one faces in calculating the right potentiometer to use. In this Instructable, we will not use a potentiometer , and will still be able to control stirring speed. The stirring action is achieved through magnetism. Inside a project box, there are two magnets glued to a fan which spins, powered by the 12V DC power supply, and controlled by resistors on a rotary switch. Above the lid of the project box, a beaker sits, and inside the beaker, a magnetic stir bar is placed. The magnetic stir bar corresponds with the magnets inside the project box, and will move as the magnets on the fan move, as it is attracted to the poles of the magnets. The movement of the stir bar will cause the movement of the surrounding liquid, therefore stirring the liquid, as it moves in a circular motion above the hidden magnets.

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This will save you hours of trying to find the right socket. Or ask your friends. Simply place the plastic in a container of hot water until it turns clear. Three AAA batteries were used in this case. The magnets will increase the profile of the fan, so you will need spacers before putting a flat surface on top. Without it the cooler just dont spin. I used a fairly large one for the demonstration videos. Make sure your fan won't hit the back of the potentiometer or switch, and that you can secure the wires safely away. In fact, this stirrer almost looks professionally made. This one was built to mix E-cigarette vape juice. Don't get your fingers between them. The stir bar used in this instance comprises four magnets, a small piece of plastic, and some tape.

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This magnetic stirrer uses an old computer fan and some cheap neodymium magnets with a moldable plastic stir bar. International Hazard. You do not want the magnet material in your reaction. My magstirrer. DIY magnetic stirrers are common in the homebrewing community, used to agitate and drive off CO2 i yeast starters. Either way, make sure the spacers are higher than the profile of the fan with the magnets glued on. Some of the greatest men of science have publicly repudiated a theory which earlier they hotly defended. A rattle magnet will work badly or stall the motor on a commercial stir plate. I couldn't find any locally. For what we're doing, it's very simple. If not, you can get them cheap from auto parts stores, home improvement stores, or Radio Shack.