electronics: intro quantities: voltage current power devices: resistor capacitor inductor led...
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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.
QuickTime™ and aGIF decompressor
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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.
QuickTime™ and aPhoto - JPEG decompressor
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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
QuickTime™ and aPhoto - JPEG decompressor
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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