Car Charger Schematic

Electrical Energy and Solar Module Efficiency

Grades:
7-12
Unit:
Off the Grid
Lesson Number:
1
Description:

This lesson will let students do research to define terms that will be used in this unit. They will record this information in their Journals, which can be scientific or simple homemade notebooks. This lesson will also introduce the multimeter, small solar...

Energy Content:
Circuitry,
Electrical Energy,
Energy Efficiency,
Energy Fundamentals,
Solar Photovoltaic
+
-
More Details Less Details
Learning Goal(s):
1. Students will document necessary terms in their journals 2. Students will be able to set up a multimeter to measure voltage 3. Students will be able to set up a multimeter to measure current 4. Students will be able to calculate power from data collected 5. Students should be able to measure the collector area of a solar module (area of solar cell(s) within solar module) and represent this value in square meters (m^2)
Pedagogy & Practice:
Group Work/Collaboration,
Hands-on Materials,
Research-Secondary
NGSS Science and Engineering Practices:
3: Planning and Carrying Out Investigations,
4: Analyzing and Interpreting Data,
5: Using Mathematics and Computational Thinking,
7: Engaging in Argument from Evidence,
8: Obtaining, Evaluating, and Communicating Information
Author:
Brett McFarland
Relevant NGSS PE:
MS-ETS1-3,
MS-PS2-3,
HS-ETS1-3,
HS-PS3-1,
HS-PS3-3
Other Subjects Covered:
ELA: Reading: Scientific & Technical,
ELA: Writing,
ELA: Vocabulary Development,
Math: Addition, Subtraction, Multiplication, Division,
Math: Measurement
Estimated Activity Length:
4 hours
Car Charger Schematic

Activities and Assessment of Vocab and Units

Grades:
7-12
Unit:
Off the Grid
Lesson Number:
2
Description:

This lesson is intended as a way to check for student understanding regarding the content presented in the previous lesson of this unit. The assessment takes place in two parts: a written assessment of content-related vocabulary and concepts as well as a...

Energy Content:
Circuitry,
Electrical Energy,
Energy Efficiency,
Energy Fundamentals
+
-
More Details Less Details
Learning Goal(s):
Students will be able to define voltage, current, power and energy as it relates to electricity.Students will be able to define electricity and have the units for all the above terms in their Journals.Students will be able to set up multimeters for voltage and current and will be assessed on this.
Pedagogy & Practice:
Group Work/Collaboration,
Hands-on Materials
NGSS Science and Engineering Practices:
5: Using Mathematics and Computational Thinking,
7: Engaging in Argument from Evidence
Author:
Brett McFarland
Relevant NGSS PE:
4-PS3-2,
HS-PS3-1
Other Subjects Covered:
ELA: Writing,
ELA: Vocabulary Development
Estimated Activity Length:
2 hours
Car Charger Schematic

Phone Charger Efficiency

Grades:
7-12
Unit:
Off the Grid
Lesson Number:
3
Description:

This is part of the Off the Grid Unit. In this lesson students will explore the concept of efficiency , and how to take data in order to calculate the efficiency of various cell phone or USB charging circuits. They will complete this process by using a...

Energy Content:
Circuitry,
Electrical Energy,
Electronics
+
-
More Details Less Details
Learning Goal(s):
1. Students will use multimeters to measure voltage and current in circuits. 2. Students will use collected data and be able to make power calculations from this data. 3. Students will also be able to calculate efficiency from their power calculations. 4. Students will be able to compare efficiencies in order to identify the circuit that is most efficient. 5. Students will be able to make circuits from a diagram and vice versa.
Pedagogy & Practice:
Hands-on Materials
NGSS Science and Engineering Practices:
2: Developing and Using Models,
3: Planning and Carrying Out Investigations,
4: Analyzing and Interpreting Data,
5: Using Mathematics and Computational Thinking,
7: Engaging in Argument from Evidence,
8: Obtaining, Evaluating, and Communicating Information
Author:
Brett McFarland
Relevant NGSS PE:
HS-PS3-1
Other Subjects Covered:
Math: Addition, Subtraction, Multiplication, Division,
Math: Graphing & Representation
Estimated Activity Length:
2 hours
Car Charger Schematic

Exploring Buck and Boost Converters

Grades:
7-12
Unit:
Off the Grid
Lesson Number:
4
Description:

This lab uses a variety of voltage conversion devices to output 5 Volts, the requirements for a USB charger such as for a cell phone. Students will take data on these devices and calculate, graph and compare efficiencies of different devices. Devices used...

Energy Content:
Circuitry,
Electrical Energy,
Electronics
+
-
More Details Less Details
Learning Goal(s):
1. Students will use multimeters to measure voltage and current in circuits. 2. Students will use collected data and be able to make power calculations from this data. 3. Students will also be able to calculate efficiency from their power calculations. 4. Students will be able to compare efficiencies in order to identify the circuit that is most efficient. 5. Students will be able to make circuits from a diagram and vice versa.
Pedagogy & Practice:
Hands-on Materials
NGSS Science and Engineering Practices:
1: Asking Questions and Defining Problems,
2: Developing and Using Models,
3: Planning and Carrying Out Investigations,
4: Analyzing and Interpreting Data,
5: Using Mathematics and Computational Thinking,
6: Constructing Explanations and Designing Solutions,
7: Engaging in Argument from Evidence,
8: Obtaining, Evaluating, and Communicating Information
Author:
Brett McFarland
Relevant NGSS PE:
HS-PS3-1
Other Subjects Covered:
Math: Measurement
Estimated Activity Length:
3 hours
Car Charger Schematic

DC to AC to DC Efficiency

Grades:
7-12
Unit:
Off the Grid
Lesson Number:
5
Description:

This is part of the Off the Grid Unit. This lesson will continue to deal with efficiency of USB charging devices, but this time we will be using an inverter in order to create AC voltage from a battery pack, and then use a standard AC charger (what you...

Energy Content:
Circuitry,
Electrical Energy
+
-
More Details Less Details
Learning Goal(s):
1. Students will use multimeters to measure voltage and current in circuits. 2. Students will use collected data and be able to make power calculations from this data. 3. Students will also be able to calculate efficiency from their power calculations. 4. Students will be able to compare efficiencies in order to identify the circuit that is most efficient. 5. Students will be able to make circuits from a diagram and vice versa. 6. Students will know what an inverter is and what it does.
Pedagogy & Practice:
Hands-on Materials
NGSS Science and Engineering Practices:
2: Developing and Using Models,
3: Planning and Carrying Out Investigations,
4: Analyzing and Interpreting Data,
5: Using Mathematics and Computational Thinking,
6: Constructing Explanations and Designing Solutions,
7: Engaging in Argument from Evidence,
8: Obtaining, Evaluating, and Communicating Information
Author:
Brett McFarland
Relevant NGSS PE:
HS-PS3-1
Other Subjects Covered:
Math: Measurement
Estimated Activity Length:
3 hours
BioLite

Biolite - Fire to Phone Charging

Grades:
7-12
Unit:
Off the Grid
Lesson Number:
6
Description:

This is the 6 th part in the Off the Grid Unit. This lesson continues to look at the efficiency of USB charging devices, but this time we will be using a commercially available camping stove that uses heat to create electricity in order to charge a phone....

Energy Content:
Electrical Energy,
Energy Efficiency,
Energy Fundamentals,
Thermal Energy (Heat)
+
-
More Details Less Details
Learning Goal(s):
1. Students will use thermometers and a stopwatch to calculate power. 2. Students will use collected data and be able to make power calculations from this data. 3. Students will also be able to calculate efficiency from their power calculations. 4. Students will be able to compare efficiencies to other circuits tested in this unit. 5. Students will know what the Peltier Junction does.
NGSS Science and Engineering Practices:
3: Planning and Carrying Out Investigations,
4: Analyzing and Interpreting Data,
5: Using Mathematics and Computational Thinking,
7: Engaging in Argument from Evidence
Author:
Brett McFarland
Relevant NGSS PE:
HS-PS3-1
Other Subjects Covered:
Math: Addition, Subtraction, Multiplication, Division,
Math: Measurement
Estimated Activity Length:
1 hour
Car Charger Schematic

Designing a Solar Phone Charger

Grades:
7-12
Unit:
Off the Grid
Lesson Number:
7
Description:

This is the culminating activity for the unit “Off the Grid.” Students will be given some restricted parameters around which to design a solar powered battery operated phone (or other USB device) charger . They will charge the AA battery packs that have...

Energy Content:
Circuitry,
Electrical Energy,
Solar Photovoltaic
+
-
More Details Less Details
Learning Goal(s):
1. Students will be able to design a device that can charge a phone with 4 hours of sun a day. 2. Students will use collected data and be able to support their design – i.e. the data will show that the unit will produce enough energy to charge a phone given it receives 4 hours of sun a day. 3. Students will also be able to calculate efficiency from their power calculations. 4. Students will be able to compare efficiencies of their circuit to others tested in this unit. 5. Students can calculate how much energy 4 hours of sunlight can produce on the solar modules they will use.
Pedagogy & Practice:
Engineering Design
NGSS Science and Engineering Practices:
2: Developing and Using Models,
4: Analyzing and Interpreting Data,
5: Using Mathematics and Computational Thinking,
6: Constructing Explanations and Designing Solutions,
7: Engaging in Argument from Evidence
Author:
Brett McFarland
Relevant NGSS PE:
HS-ETS1-2,
HS-ETS1-3,
HS-PS3-1,
HS-PS3-3
Other Subjects Covered:
Math: Addition, Subtraction, Multiplication, Division,
Math: Measurement
Estimated Activity Length:
5 hours