Diy magnetic mixer

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, diy magnetic mixer.

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Diy magnetic mixer

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. We imagine this could be put to fun use for stirring coffee or cocktails, too — if built with a food-grade spinner. More advanced designs are also possible for the eager home scientist. Video after the break. Most commercial grade chemical stirrers are coated in PTFE or some other plastic that specifically does not react to many chemicals. Despite that, I have chewed up a few over time.

Simply place the plastic in a container of hot water until it turns clear. This diy magnetic mixer has several different components to those above, the primary one being that it uses a DC motor instead of a cooling fan. It also uses a 9V battery as the power source and has a speed control option.

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. Glue the magnets on opposite sides of the fan head. The magnets in the fan's motor may push the magnets around a bit, so arrange accordingly.

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. Glue the magnets on opposite sides of the fan head.

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. The DIY magnetic stirrer is perfect for dissolving stubborn solutes, stirring for long amounts of time, and allowing stirring of covered mixtures to prevent evaporation. The aim of using the rotary switch is to avoid tricky calculations and problems associated with the potentiometer.

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My plan to make a stirrer ideal to chemistry hobby includes a heating unit too, like 'professional' units. Hard drive magnet or neodymium magnets bar magnet from the hardware store. Next step was tight winding PTFE tape on it. Fourth Picture is a macro to the "whirlwind" I don't know the proper word in english which is barely visible btw. Possible parts sources: Almost all of this is out of my junk box. Plug it in, hit the power switch, and see if the fan spins. The creator mentions that you can choose from a range of voltage sources as long as the fan is rated to it. You can just lay the magnet on the cover and try to spin the fan. Not logged in [ Login ]. The power requirements should be marked. I chose based on the physical connections. Connect the appropriate pole of the potentiometer to the positive yellow if present, or red. This means they don't provide galvanic isolation between input and output. I recommend both the power switch and knob are both on the front for easy access. We did some digging to find out and discovered there are quite a few viable options available.

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I recommend a variety of sizes. You can use a case fan or power supply fan. The creator used a mini drill as a routing tool to cut a hole in the plastic container for the switch. There are three 3D-printed parts in total: the main stirrer housing, a stir bar with slots to hold two magnets, and a mount for the fan with four slots for magnets. For what we're doing, it's very simple. They don't normally mix. You want to put the fan in the middle of the top, so you can center whatever is being stirred. Wood and Plastic Sheet for the casing It was pretty easy once I figured out how to adapt the magnet to the motor, first I used some rubber bands connected to a ball bearing where the magnet was going to fit but finally I just simply glued the magnet to the motor and it fitted quite nice and is also balanced. There is no option of speed control with this model. You can now test it with a flea to see it spin. Two same HD magnets were glued on a mild steel disk and this on a ordinary 12V PC cooler: Some small wood pieces were glued in the way seen in picture to form a little gap between rotating magnet and upper surface in which the container with stirr bar will rest. You do not want the magnet material in your reaction. I recommend both the power switch and knob are both on the front for easy access. Think about where you want all the parts when you're done, and make sure things fit. 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.