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Voltage and Current: Motors (2019)
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Introduction: Fan -
Failed Motor Circuit: Insufficient Voltage
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Check Your Understanding: Failed Motor Circuit -
Mini-Project: Current Investigation
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Upload Photo: Measuring current using a multimeter -
Check Your Understanding: Current Investigation
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Mini-Project: Larger Battery
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Upload Photo: Creating a Larger Battery
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Check Your Understanding: Larger Battery
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Motor Direction
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Fuses
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Upload Photo: Using a Fuse
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Check Your Understanding: Fuses
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Rechargeable Batteries
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Check Your Understanding: Rechargeable Batteries
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Project: Fan
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Upload Video: Fan -
Upload Block Diagram: Fan
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Unit Project: Create a Fan
Fan
The final project for this unit is to construct a fan. You will also need to attach “fan blades” to the motor.
Requirements
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Basic Design Requirements
- Design and build a cardboard or foam core box with a motor facing the outside of the box.
- There should be a power switch that turns the fan on or off.
- There should be fan blades attached to the motor.
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Build Requirements
- You can use any wires or connectors from previous steps.
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Workmanship
- Mount all the pieces securely. Nothing should come loose when shaken.
- Only the motor and switch should be visible from the side it's on.
- All wiring should be neat, of the proper length, and securely attached.
+5 bonus points for each additional design feature that benefits the functionality or durability of the device. For instance, protecting the electronic components with an additional cardboard "shield", or placing the battery in a more robust battery holder (50 pts).
Scoring Characteristics
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Core Functions 30 pointsFan must go on when the main power switch is in the ON position, and turn off when it is in the OFF position. No components except the Motor are visible. Switch is on the box.
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Workmanship: Shake Test 10 pointsWhen shaken firmly, the motor must not slow down or stop. No rattling of parts should be heard or felt.
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Workmanship: Neatness 10 pointsAll wires should be of a proper length and use proper connectors -- no extra loops should be present, and connections should not be secured with tape where a connector is more appropriate (for instance, using electrical tape instead of a spade connector on a screw terminal).
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Bonus: Unique Improvements +5 points / additional design+5 bonus points for each additional design feature that benefits the functionality or durability of the device. For instance, protecting the electronic components with an additional cardboard "shield", or placing the battery in a more robust battery holder.