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Welcome to Engineering in the Kitchen! Go sign up for Campuswire if - - PowerPoint PPT Presentation
Welcome to Engineering in the Kitchen! Go sign up for Campuswire if - - PowerPoint PPT Presentation
Welcome to Engineering in the Kitchen! Go sign up for Campuswire if you haven't already (link is in the Canvas announcement) EN 1-24: Engineering in the Kitchen Steven Bell 9 September 2020 About me Bachelor's in Computer Engineering MS/PhD
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About me
Bachelor's in Computer Engineering MS/PhD in Electrical Engineering Two summer-long internships
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Warning!
This is a brand-new course. There will be problems - please be patient. And let us know how we can improve!
BUMPS AHEAD
Also, COVID.
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Electrical Engineering Taking things apart Food and cooking
This course
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About you
Go write on the Google Doc: why are you interested in this course?
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Teaching staff
Mels Burns Melissa Rowland Joe Reese Youssef Soliman
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I want everyone to succeed in this class! And to have fun. If you're falling behind, please reach out and get help! Rarely does "working harder" solve the problem. We'll evaluate your learning based on what you can do, not on a curve against each other.
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Office hours
OH are for everyone! Walking office hours are an experiment - come join!
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A word on stereotypes
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By the end of class today, you should be able to:
Explain what resistance is Explain what voltage and current are, and how they are different Use Ohm's law to calculate V/I/R
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e- e- e- Opposites attract
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Electric field
Describes the force a positive charge will experience
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Batteries and wire
A chemical reaction produces charges, until it reaches equilibrium.
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Connecting the wire
Charges cancel, but the battery produces more, setting up a new equilibrium.
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A field in the wire
The charge gradient produces an electric field, which pushes current down the wire!
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One way to think about a circuit:
Marbulous - amazon.com
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Marbulous - amazon.com
How many marbles roll through per second?
Current in the marble machine
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Marbulous - amazon.com
How much does a marble drop from input to output?
Voltage in the marble machine
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Current
Current is charge per second past a point Measured in Coloumbs /second = Amps i1
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A B x
We say that A has higher potential than B.
Work in an electric field
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Work in a wire
Voltage is difference in electrical potential Measured in Joules/Coulomb = Volts
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Circuit schematics
A schematic is an abstraction for describing a circuit. Some elements you should know:
Block element Voltage source Switch Battery
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Light bulb Battery Switch
Flashlight schematic
(Before all flashlights switched to LEDs)
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Circuit schematics
connected not connected connected connected
(dot is only for clarity)
It's important to be clear about what's connected and what is not: A connected region is called a "node".
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Congruent schematics
There are many ways to draw the same circuit. Don't be fooled just because they appear different - check what connects to what! A B C D A C B D
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Write on the Google doc: what is one question you have after today's class?
Wrapping up
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