Not all radio components require high temperatures, vacuum for the manufacture of ultrapure substances. Some of them can be made at home as well. In addition to resistors, capacitors and coils, you can also make galvanic cells yourself.
Instructions
Step 1
Use only safe materials in homemade electrochemical cells. Avoid, in particular, the use of lithium, lead, mercury, copper sulfate, acids. Remember that even non-toxic electrolytes can become toxic after working in a cell due to the dissolution of metals in them. Do not short-circuit homemade batteries.
Step 2
Use dissimilar metal electrodes. The greater the difference in the electrochemical potentials of the metals that make up the element, the greater the voltage generated by it. It cannot exceed this difference. An electrode made of metal with a high potential will dissolve - it is a kind of fuel for the element, a consumable material.
Step 3
Try using electrodes, one made of uncoated steel and the other made of galvanized steel. Both of them can be screws, for example. Such a galvanic cell will work until gaps appear in the zinc layer, behind which the surface of the steel is visible. Then the element will close and stop working. This can be avoided by using an item made of whole zinc, but it is quite difficult to find it.
Step 4
In the absence of zinc or galvanized items, make up an element of steel and aluminum electrodes. The first can be a tongue from a beverage can, the second is a paper clip. The combination of the same aluminum tongue and copper wire helix also works well.
Step 5
Place the electrodes in a small vessel filled with electrolyte - a saturated solution of sodium chloride. They should not touch each other. The places where the wires are connected to them should be located above the electrolyte level.
Step 6
One cell gives a voltage of less than a volt. Measure it. Connect in series, observing the polarity, so many elements that you get about 1, 5 or 3 V - then it will be possible to power a clock or a calculator with an LCD indicator from them. True, the design will turn out to be stationary, since when you try to transfer it, the electrolyte will inevitably be poured out. Observe the polarity when connecting the battery to the load. Do not try to combine such a number of cells into a battery that can generate a voltage above 24 V, as it can be dangerous for an untrained experimenter.
Step 7
Replace the electrolyte as it dries. Also, periodically replace the electrode with high electrochemical potential as it is consumed.
