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

Electronics: Intro QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

Quantities:

Voltage

Current

Power

Devices:

Resistor

Capacitor

Inductor

LED

Transistor

Op-Amp

Laws:

Ohm’s Law

Kirchhoff’s Laws

Voltage QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

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Voltage QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

QuickTime™ and aGIF decompressor

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Voltage = pressure that pushes electrons through circuitWater analogy: voltage = altitude of water

Current QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

3A i

Current QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

3A i

Current = flow of electrons through circuitWater analogy: current = flow of water

Power QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

http://en.wikipedia.org/wiki/Hydroelectric

http://www.usbr.gov/power/data/sites/glencany/glencany.html

http://www.wapa.gov/newsroom/cct/2005/july15/27no141a.htm

Power QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

http://en.wikipedia.org/wiki/Hydroelectric

http://www.usbr.gov/power/data/sites/glencany/glencany.html

http://www.wapa.gov/newsroom/cct/2005/july15/27no141a.htm

Power = voltage x currentWater analogy: power = altitude drop x flow

Resistor QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

3 Ω R

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Resistor QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

3 Ω R

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Resistor reduces current flowWater analogy: flow less for winding river

Capacitor QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

1mF C

Capacitor QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

Capacitor stores chargeWater analogy: tank stores water

1mF C

Inductor QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

1μH

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

Inductor QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

Inductor creates magnetic field opposing current changeWater analogy: mill wheel with inertia opposes flow change

1μH

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

LED QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

http://www.furuier.com/english/product/index0.htm

http://www.xmission.com/~m3lody/junk/xmas2002/lit_waterfall1.jpg

D

LED QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

LED lights up and acts like voltage dropWater analogy: lit waterfall

http://www.furuier.com/english/product/index0.htm

http://www.xmission.com/~m3lody/junk/xmas2002/lit_waterfall1.jpg

D

Transistor QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

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C

E

Transistor QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

Transistor current flow controlled by second small current flowWater analogy: spillway for dam controlled by hydraulic line

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C

E

Op-Amp QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

9V

-9V

vn

vp

vo

Op-Amp QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

Op-amp magnifies voltage across inputsWater analogy: Lever translates small pressure into high pressure

9V

-9V

vn

vp

vo

Ohm’s Law QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

9V 3Ω iQuickTime™ and a

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Ohm’s Law QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

9V 3Ω i

Current in resistor = voltage / resistanceWater analogy: flow = altitude drop / length of river

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Kirchhoff’s Voltage Law QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

QuickTime™ and aGIF decompressor

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Kirchhoff’s Voltage Law QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

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Sum of voltage drops around loop = 0Water analogy: total altitude change for loop = 0

9V v1 v2

Kirchhoff’s Current Law QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

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i1 i2

i3

Kirchhoff’s Current Law QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

Sum of current flowing out of node = 0Water analogy: what flows in must flow out

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i1 i2

i3