Basic Electronics

• Electronics

      is Components

  and circuitry that use Electricity.

  There are a lot of different components. The circuitry is how they're connected together.
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• The physical basis of it all is Electrons, which are one of the 3 fundamental particles in atomic physics that make up all matter.
  
  
• The Key Thing about electrons is that they have a negative charge.
  
• Electricity, is what you have whenever you have electrons accumulating or moving (electron flow).

• Everything, all matter, all materials, have atoms, and all atoms have electrons.
  But in some materials, the electrons can come off their atoms and move around.
  These are the materials we call Conductors.
  In general, Metals are good conductors and most other things are insulators and are not conductors.

  
  T5A07 (C)
  Which of the following is a good electrical conductor?
  A. Glass
  B. Wood
  C. Copper
  D. Rubber
  ~~

  
  T5A08 (B)
  Which of the following is a good electrical insulator?
  A. Copper
  B. Glass
  C. Aluminum
  D. Mercury
  ~~

• Liquids are a special kind of matter.

  Mercury is a special case. It's a liquid, but it's also a metal, so it is a good conductor.

  In general, a lot of petroleum-based liquids are insulators, like oil or grease.

  But most water-based liquids are conductors.

  Don't get your electronics wet. Don't be standing in water if you might touch a hot power line.
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• The first Component we'll talk about is a Battery, which you can think of as a source of electrons.
  • Batteries have two ratings or parameters that we have to pay attention to:
    Their Voltage and their Capacity.
  

  [pool question on schematic]

  
  
  T6C01 (C)
  What is the name of an electrical wiring diagram that uses standard component symbols?
  A. Bill of materials
  B. Connector pinout
  C. Schematic
  D. Flow chart
  ~~

  T6C05 (C)
  What is component 4 in figure T1?
  A. Resistor
  B. Transistor
  C. Battery
  D. Ground symbol
  ~~

• Amperes are a measure of current, which is electron flow.

  
  1 ampere is defined as 6.24 x 10¹⁸ electrons per second

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eof