Diy magnetic mixer

When mixing or agitating delicate solutions in the chemistry lab, a magnetic stirrer is often the tool of choice.

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.

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. That is a fan from a donated junk computer. You can use a case fan or power supply fan. The power requirements should be marked. It must output more than the rating of the fan. I found this one in my junk box. It's 12VDC 1. If you don't have one, ask around.

Then round off the edges and mold until the bar is roughly cylindrical with the embedded disk magnets still inside.

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.

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 arranged the magnets to have opposite polarities facing up. The magnets will increase the profile of the fan, so you will need spacers before putting a flat surface on top. The spacers can be anything, I used coins initially.

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.

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This is a simple step, but people always forget. The magnets in the fan's motor may push the magnets around a bit, so arrange accordingly. A dremel tool is used to sand down the remainder of the blades. This means they don't provide galvanic isolation between input and output. The housing for this model makes for a neat aesthetic and is very simple to construct from a few pieces of wood. To extract it from a hard drive will be a little fun work. 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. Often built from computer fans with glued on magnets and a speed controller. Plug it in, hit the power switch, and see if the fan spins. About the author Aimee breaks down complex science and technology topics to help readers digest concepts and troubleshoot issues. Fourth Picture is a macro to the "whirlwind" I don't know the proper word in english which is barely visible btw.

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Hot glue is used to hold it in place. 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. Makes me just a little nervous about the magnet going to the tanget due to the centripetal force and blasting the glass. It uses a female power adapter DC barrel to screw plug jack connector to connect the fan wires to a power brick. That is quite insane actually. The creator mentions that you can choose from a range of voltage sources as long as the fan is rated to it. An old cellular phone charger 0. The main component of the stirrer is an old computer fan with magnets glued to it. This means they don't provide galvanic isolation between input and output. You're going to destroy the drive anyways. I couldn't find any locally. The magnets will increase the profile of the fan, so you will need spacers before putting a flat surface on top. Worst case, you can use part of the wire from the power supply.