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Electronics: Intro

Electronics: Intro. Quantities: Voltage Current Power Devices: Resistor Capacitor Inductor LED Transistor Op-Amp Laws: Ohm’s Law Kirchhoff’s Laws. Voltage. Voltage. Voltage = pressure that pushes electrons through circuit Water analogy: voltage = altitude of water.

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Electronics: Intro

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  1. Electronics: Intro Quantities: Voltage Current Power Devices: Resistor Capacitor Inductor LED Transistor Op-Amp Laws: Ohm’s Law Kirchhoff’s Laws

  2. Voltage

  3. Voltage Voltage = pressure that pushes electrons through circuit Water analogy: voltage = altitude of water

  4. Current

  5. Current Current = flow of electrons through circuit Water analogy: current = flow of water

  6. Power http://www.usbr.gov/power/data/sites/glencany/glencany.html http://en.wikipedia.org/wiki/Hydroelectric http://www.wapa.gov/newsroom/cct/2005/july15/27no141a.htm

  7. Power http://www.usbr.gov/power/data/sites/glencany/glencany.html http://en.wikipedia.org/wiki/Hydroelectric http://www.wapa.gov/newsroom/cct/2005/july15/27no141a.htm Power = voltage x current Water analogy: power = altitude drop x flow

  8. Resistor

  9. Resistor Resistor reduces current flow Water analogy: flow less for winding river

  10. Capacitor

  11. Capacitor Capacitor stores charge Water analogy: tank stores water

  12. Inductor http://www.magnariders.com/html/Rides/rally/2005_Rally.html

  13. Inductor http://www.magnariders.com/html/Rides/rally/2005_Rally.html Inductor creates magnetic field opposing current change Water analogy: mill wheel with inertia opposes flow change

  14. LED http://www.furuier.com/english/product/index0.htm http://www.xmission.com/~m3lody/junk/xmas2002/lit_waterfall1.jpg

  15. LED http://www.furuier.com/english/product/index0.htm http://www.xmission.com/~m3lody/junk/xmas2002/lit_waterfall1.jpg LED lights up and acts like voltage drop Water analogy: lit waterfall

  16. Transistor

  17. Transistor Transistor current flow controlled by second small current flow Water analogy: spillway for dam controlled by hydraulic line

  18. Op-Amp

  19. Op-Amp Op-amp magnifies voltage across inputs Water analogy: Lever translates small pressure into high pressure

  20. Ohm’s Law

  21. Ohm’s Law Current in resistor = voltage / resistance Water analogy: flow = altitude drop / length of river

  22. Kirchhoff’s Voltage Law

  23. Kirchhoff’s Voltage Law Sum of voltage drops around loop = 0 Water analogy: total altitude change for loop = 0

  24. Kirchhoff’s Current Law

  25. Kirchhoff’s Current Law Sum of current flowing out of node = 0 Water analogy: what flows in must flow out

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