Magnetic stirrer
A magnetic stirrer is necessary in every laboratory for mixing liquids of different viscosities. Now you can assemble a magnetic stirrer for your mini laboratory.
So we will need: a cooler from a computer, magnets from an old or broken speaker, instant glue, a case from a CD, and a few other little things that are found in almost every home.
Take the disc case.
And using a compass or some other method, we cut out such a circle, smaller in size than the diameter of the cooler blades.
Then we'll take the old speaker
And let's take the magnet out of it.
Let's break this magnet into pieces and glue them to a circle of CDs, and the circle, in turn, will glue it to the center of the cooler.
Now if you turn on the cooler, the magnets will rotate along with the blades.
Then we make the body. In the pictures below there are three options: from a plastic jar, from plexiglass, from wood. Whichever one you like, do it that way.
If desired, you can make a diagram of the cooler rotation speed regulator.
You can make the control circuit simpler - using just one wirewound variable resistor or potentiometer.
And finally - the mixer in action:
Job: An oblong magnet is thrown into a vessel with a stirred liquid.Place the vessel on the stirrer. The rotation of the cooler magnets is transmitted to the magnet in the vessel. Accordingly, the smaller the distance between the magnet in the vessel and the magnets on the cooler, the better!
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