Car Charger Schematic

Phone Charger Efficiency

Grades:
7-12
Unit:
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...

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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:
Author:
Brett McFarland
Relevant NGSS PE:
Estimated Activity Length:
2 hours
Car Charger Schematic

Exploring Buck and Boost Converters

Grades:
7-12
Unit:
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...

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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:
Author:
Brett McFarland
Relevant NGSS PE:
Other Subjects Covered:
Estimated Activity Length:
3 hours
Kill-A-Watt_Meter

Energy Efficiency - Lighting

Grades:
4-5
Unit:
Lesson Number:
4
Description:

In this lesson, students will learn how to read light bulb packaging (lighting facts) and do a whole class experiment comparing a 60-watt incandescent to an equivalent CFL and an LED bulb. This experiment will be conducted using a kil-o-watt meter,...

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Learning Goal(s):
Students will understand what energy efficiency means, and learn how to choose energy efficient light bulbs. Students will determine which lightbulbs are the most efficient. Students will understand how energy efficiency relates to energy generation and climate change.
Author:
Debbie Abel
Estimated Activity Length:
50 min
Car Charger Schematic

DC to AC to DC Efficiency

Grades:
7-12
Unit:
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...

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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:
Author:
Brett McFarland
Relevant NGSS PE:
Other Subjects Covered:
Estimated Activity Length:
3 hours
BioLite

Biolite - Fire to Phone Charging

Grades:
7-12
Unit:
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....

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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.
Author:
Brett McFarland
Relevant NGSS PE:
Estimated Activity Length:
1 hour
Car Charger Schematic

Designing a Solar Phone Charger

Grades:
7-12
Unit:
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...

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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:
Author:
Brett McFarland
Estimated Activity Length:
5 hours