Desktop Fan Project Introduction Living with the Lab Desktop fan workshop ASEE 2012 Conference.

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Presentation transcript:

Desktop Fan Project Introduction Living with the Lab Desktop fan workshop ASEE 2012 Conference

LWTL: Desktop Fan Overview 2 Learning Objectives Primary Learning Objectives ❖ Assemble circuits to drive a small DC motor and a servo motor ❖ Control the DC motor speed with PWM ❖ Sweep the servo back and forth ❖ Control the motor speed with a potentiometer Bonus Objective ❖ Toggle the motor on and off with a momentary button

LWTL: Desktop Fan Overview 3 What can you do with this? Oomlout Starter Kit for Arduino

LWTL: Desktop Fan Overview 4 What can you do with this? Adafruit Experimentation Kit for Arduino

LWTL: Desktop Fan Overview 5 What can you do with this? Sparkfun Inventor’s Kit for Arduino

LWTL: Desktop Fan Overview 6 Make an oscillating fan from these parts

LWTL: Desktop Fan Overview 7 Project for students Design and build a fan to satisfy these objectives ❖ A desktop toy for promoting my company ❖ Air flow direction oscillates ❖ Fan has on-off button ❖ Fan speed is variable ❖ Be creative: I want to like this fan!

LWTL: Desktop Fan Overview 8 “Pull” model of project based instruction Show the students an answer ❖ Students need to learn skills to imitate the “answer” ❖ Most students don’t want to imitate the design ❖ Several aspects of the structure are left unspecified

LWTL: Desktop Fan Overview 9 “Pull” model of project based instruction Show the students an answer ❖ Students need to learn skills to imitate the “answer” ❖ Most students don’t want to imitate the design ❖ Several aspects of the structure are left unspecified To complete the project students must ❖ Learn how to use Solidworks (or similar tool) to draw the structure ❖ Measure parts in order to make the structure fit ❖ Learn how to write loops and other programming structures ❖ Learn how to debug, because it doesn’t work the first time ❖ Learn how to make a presentation to explain their design to the rest of the class ❖ Work on a team, because there is too much work for one person

LWTL: Desktop Fan Overview 10 DC Fan Assembly Assembled for workshop participants ❖ Laser cut acrylic base and fan strut ❖ Extension leads on DC motor ❖ DC motor secured with zip ties ❖ Servo mounted with snap rivets ❖ Strut screwed to the servo horn

LWTL: Desktop Fan Overview 11 Focus on wiring and programming Today we will focus on ❖ Getting the DC motor circuit working ❖ Connecting the Servo ❖ Playing with loops and delays to control sweep speed ❖ Connecting a potentiometer to control fan speed ❖ Connecting a button or switch to toggle the fan on and off