Module 1-4: System Thinking (from the point of view of the Battery)
- Due Aug 29, 2024 by 12:30pm
- Points 10
- Submitting a file upload
System Thinking:
From the Point of View of the Battery
SYSTEM THINKING –is more than sum of parts . There are design goals (you thought about those in Module 1-1: Designing a SmartPhone), and there are constraints (cost, power, laws of physics, for example). We may have to adjust our dream designs to meet what is reality today, while still keeping our eye on what's new for the future.
Today we are going to talk about the power system in a smart phone -- the battery (and what power, voltage, and current are), how much power the parts of the phone need, and how they work together in a system. And let's talk also about sustainability, and what's behind charging your phone.
INTERNATIONAL SYSTEM THINKING: In some countries, mobile phones are available, yet the wired grid is not. In fact, it is possible the wired grid may never be built in these places ...
Learning Objectives
What's System Thinking?- The Battery: What are charge (coulombs), voltage (volts), current (amperes or amps), resistance (ohms), power (watts), energy (watt-hours, or kilo-watt hours kWh)? How are these values related?
- Information Evaluation: Does your phone take as much energy as a refrigerator? (and how does this impact international policies?)
Pre-Class Assignment
- No Pre-class assignment today, BUT if you have easy access to your electric circuit breaker or fuse panel in your home / apartment, bring a photo of it to share in our Zoom meeting.
- Make sure you have a working calculator on your phone, so we can do some basic calculations of voltage, current, and power.
In Class Activities
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- Share your circuit breaker pictures, and we'll talk about what you see in your breaker box.
- We'll talk about voltage, current, resistance, power, energy, and how they are related (Ohm's Law, and walk through some of the calculations).
- Slides I'll use in class today (you may want to take notes on these):module 1-4 Voltage and Power smaller.pdf Download module 1-4 Voltage and Power smaller.pdf
- Handout for taking notes on and TURN THIS IN, or just scan and turn in your notes from lass: Module 1-4 IN Class handout.docx Download Module 1-4 IN Class handout.docx
- Heard a word you didn't understand? Have a question in general? Post it here ... if you know the answer (or can find it online) for someone else, reply to their question: Vocabulary Discussion (Alphabet Soup)
- Initial discussion / preparation for the Homework
- Information Evaluation: Links to an external site.
- Consider the PADRE method for some of your initial information evaluation. Here's the LibGuide Links to an external site. and a video below:
- Here's anarticle from IEEE Spectrum Links to an external site.. IEEE is the electrical engineering professional society.
- What needs to be turned in from class time today? Module 1-4 IN Class handout.docx Download Module 1-4 IN Class handout.docx
- Here's a quick recording of today's in class lecture (but I recorded it out of class to make it quicker):
Extra Resources
- Apple to announce new iphone https://www.cnn.com/2023/08/29/tech/new-iphone-15-apple-wonderlust/index.html Links to an external site.
- Energy Use Calculator https://energyusecalculator.com/electricity_cellphone.htm Links to an external site.
- Apple iPhone Battery & Performance https://support.apple.com/en-us/HT208387 Links to an external site.
- Cost per kWh Links to an external site. Rocky Mountain Power
Homework, Extra Credit, and Feedback
Assignment 1-4: Does your smart phone use as much energy as a refrigerator?
Assignment 1-4: Extra Credit Homework Assignment: Power in your room? (10pts)
Have a Question?
- Heard a word you didn't understand? Have a question in general? Post it here ... if you know the answer (or can find it online) for someone else, reply to their question: Vocabulary Discussion (Alphabet Soup)
Find Rubric
