electronics
TRANSCRIPT
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ElectronicsStudents will be able to
Contrast different electronic signalsDescribe semiconductors Explain how phones transmit soundDescribe how sounds are transmitted
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Electronics
Electrical Device vs ElectronicsElectrical device - Continuous electricity
Electronics – Used to communicate information
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Signals Types
Analog
Varies smoothly to represent information
DigitalRepresents information in pulses or steps
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Semiconductors
Conductor
Easily transmits electric current
Insulator
Does not transmit electric current
*Semiconductor
In between – Conducts only under special conditions
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Semiconductor Types
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Diode
Allow current to only flow in one direction
Can convert AC to DC
Can be used as a switch
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Transistors
Amplifies an electronic signal
Switches current on/off
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Integrated Circuits
Semiconductors that contains many diodes, transistors, and other components all together in one thin slice
Often called chips
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Telephones
Sound converted into electronic signal for transmission and then converted back into sound
Invented by Alexander Bell 1876
Contains three parts
Transmitter
Receiver
Dialing Mechanism
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Telephones
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Sound Recordings
Analog Recordings
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Sound Recordings
Digital Recordings
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Electromagnetic Waves
Electric field and magnetic field
Travel together in wave pattern
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AM vs FM
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Radio
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TV
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Types of TV
Cathode-ray tubes
Red-Green-Blue colored dots project on screen
Liquid Crystal
Plasma
Heat up gasses that will glow different colors
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Question of Day
Describe the difference between analog and digital signals. Explain how this affects the way that records and CD are made.