Electronics is the branch of science and technology which makes use of the controlled motion of electrons through different media and vacuum. The ability to control electron flow is usually applied to information handling or device control. Electronics is distinct from electrical science and technology, which deals with the generation, distribution, control and application of electrical power. This distinction started around 1906 with the invention by Lee De Forest of the triode, which made electrical amplification possible with a non-mechanical device. Until 1950 this field was called "radio technology" because its principal application was the design and theory of radio transmitters, receivers and vacuum tubes.
HOW TO MAKE STEEL DUST PAN
MATERIALS:
1. steel plate
2. screw bolt
3. wood
4. hammer
PROCEDURE
1. fold the every three edge of the steel plate by the use of hammer.
2. attach the every the folded corner side.
3. assure that it is tighted well.
4. make a holder by the use of wood
5. display or use
My best choice: this is my best choice, because it is very usefull at home.
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