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Current
- The movement of electric charge
Transistors
- These are the marvels that made all modern electronics possible!
- The movement of electric charge
Transistors
- These are the marvels that made all modern electronics possible!
PAGE 3 (THIS PAGE)
Electrical Engineering
Electronics Terminology
Current: The push or rate of electric charge moving past a point is called the current. This current is measured in amperes or simply, amps.
Water analogy: A pool holds 100 gallons of water. If a leak occurs, the escaping water flows out. If we have a small hole, (high resistance) the rate of leakage-or current-is small; if we have a big hole (low resistance), the rate of leakage-or current-is large. Therefore, our measure of how quickly the water flows is the rate of current, measured in amps.
Transistor: An electric switch that uses the changes in voltage inputs to produce changes in current output. That is, applying voltages to the input pins (Emitter and Base) will large, rapid change in the output pin (Collector). Simply, a transistor is either on or off. Electrical signals and programming code tell the transistor to power on or power off. This represents binary (mentioned above) as states 1 for on and 0 for off.
Anatomy of a Transistor: Adding certain types of impurities to the silicon in a transistor changes its crystalline structure and enhances its ability to conduct electricity. Silicon containing boron impurities is called p-type silicon-p for positive or lacking electrons. Silicon containing phosphorus impurities is called n-type silicon-n for negative or having a majority of free electrons.
Water analogy: Two water hoses spray onto opposite panes of a revolving door; if both water sprays are equal, the door will not open, but if one is greater than the other, the door will start to spin. This generates a motor to produce more current, and therefore, the greater the difference, the greater the spin!
More Electronics terms coming soon!
Current: The push or rate of electric charge moving past a point is called the current. This current is measured in amperes or simply, amps.
Water analogy: A pool holds 100 gallons of water. If a leak occurs, the escaping water flows out. If we have a small hole, (high resistance) the rate of leakage-or current-is small; if we have a big hole (low resistance), the rate of leakage-or current-is large. Therefore, our measure of how quickly the water flows is the rate of current, measured in amps.
Transistor: An electric switch that uses the changes in voltage inputs to produce changes in current output. That is, applying voltages to the input pins (Emitter and Base) will large, rapid change in the output pin (Collector). Simply, a transistor is either on or off. Electrical signals and programming code tell the transistor to power on or power off. This represents binary (mentioned above) as states 1 for on and 0 for off.
Anatomy of a Transistor: Adding certain types of impurities to the silicon in a transistor changes its crystalline structure and enhances its ability to conduct electricity. Silicon containing boron impurities is called p-type silicon-p for positive or lacking electrons. Silicon containing phosphorus impurities is called n-type silicon-n for negative or having a majority of free electrons.
Water analogy: Two water hoses spray onto opposite panes of a revolving door; if both water sprays are equal, the door will not open, but if one is greater than the other, the door will start to spin. This generates a motor to produce more current, and therefore, the greater the difference, the greater the spin!
More Electronics terms coming soon!
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Copyright © 2008 by Steve Kochevar
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E-Mail: info@stevekochevar.com
All Rights reserved
E-Mail: info@stevekochevar.com
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