A magnetic stirrer is necessary for those who like to engage in various chemical experiments. Using this device, you can translate into reality various ideas, not only in the laboratory, but also in the domestic environment. In order not to waste personal savings, you can build a magnetic stirrer with your own hands in just a few hours. As the main parts, you can use an unnecessary printer and CD-ROM. To make the design multifunctional, you need to prepare an old CRT monitor.
Description
Many craftsmen prefer to make a magnetic stirrer with their own hands. Such an aggregate is simply indispensable in cases where you need to evenly mix, homogenize or simply dissolve several liquid media without pre-heating. Magnetic stirrers are actively used in medical, pharmaceutical, biochemical, diagnostic, and microbiological laboratories.
All these industries are focused on working with living, sensitive, easily decaying samples that are forbidden to contaminate. If you make a magnetic stirrer yourself from high-quality inert polymers and composites, then in the end you can get a high-quality device that will have a small area of contact with the mixture.
It is worth noting that some factory models make it easy to mix a 10-liter bucket of water. And this means that the mixer will perfectly cope with 5 liters of viscous liquid. The effectiveness of the device is due to the presence of a wear-free magnetic head.
Tools Required
To make a magnetic stirrer with your own hands, you need to prepare in advance all the necessary materials and devices:
- pliers;
- multimeter;
- nippers;
- drill and drill;
- screwdrivers;
- 12V power supply;
- wires
- neodymium magnet (can be taken from an old hard drive);
- circuit breakers;
- solder and soldering iron;
- adjustable wrench;
- stirring anchor;
- connectors and connectors;
- PC fan
- switch;
- rubber feet (prevent slipping of the unit);
- Super glue;
- Plastic container.
It is worth noting that you can make a magnetic mixer with your own hands if the master is familiar with the basics of electrical engineering and soldering. The final result depends on the skills of the performer.
Working nuances
To make a magnetic stirrer with your own hands, you first need to create an electrical power circuit for the future unit. In order to prevent the most common mistakes, you must use the classic scheme. After high-quality soldering, adjust the potentiometer to the specified parameters. Only then can you begin installing magnets in the laboratory mixer housing. To do this, drill a small hole in the center of the aluminum circle. Neodymium magnets are attached to the sides, and a pulley from the motor is also mounted.
At the next stage, you can assemble all the details in a single design. For fixing, you can use ordinary bolts. To keep the container firmly held in place during shaking, a small magnet must be attached to the bottom. The product must not react with acids or other reagents. At the final stage, the unit is tested. It is worth noting that the most responsible way is to choose the anchor for a magnetic stirrer. With your own hands you can make a high-quality and durable product.
Assembly rules
You can make a magnetic stirrer from improvised materials in just 1-2 hours. The first step is to connect two magnets to the cooler. They must be parallel to each other so that the poles are opposite. It is necessary to use glue, but if it is not, then ordinary tape is suitable. Since the fan will become taller due to the magnets, you need to level the height of the pad. For work, classic cooler bolts are suitable.
A plastic case from under the disks is ideal as the main surface, and an iron clip with insulation is used as a stirrer. After that, you can turn on the magnetic stirrer. To supply power, you need only two wires. Dishes for liquids must be flat. When the water is filled, you need to install a paper clip.
Expert Advice
If the work of the laboratory is aimed at conducting in-line analyzes using sensitive samples, growing or dissolving various microorganisms in nutrient media, then you need to think about the invention of a universal multi-seat magnetic stirrer with preheating. Such installations can be purchased in specialized stores, but their cost is quite high.
Large research laboratories and centers that are engaged in the production of completely new products require the purchase of a multifunctional overhead drive mixer with various nozzles. It is impossible to do without a powerful installation in the process of manufacturing sugar syrup, creams, gels, and even cement mortar.