Www.epa.gov/airscience AIR CLIMATE & ENERGY RESEARCH PROGRAM B U I L D I N G A S C I E N T I F I C F...

www.epa.gov/airscienceAIR CLIMATE & ENERGY RESEARCH PROGRAMB U I L D I N G A S C I E N T I F I C F O U N D A T I O N F O R S O U N D E N V I R O N M E N T A L D E C I S I O N S

U.S. Environmental Protection AgencyOffice of Research and Development

Air Sensor Kits for Outreach

Dana Buchbinder and Gayle HaglerU.S. EPA Office of Research and Development

2014 National Air Quality Conference, Durham, NC

2U.S. Environmental Protection AgencyOffice of Research and Development

The EPA scientist role in Science, Technology, Engineering, and Math (STEM) outreach

Questions we ask ourselves:- What can we do in our few

spare hours to inspire students to learn about environmental science and engineering?

- What do we wish we had exposure to when we were growing up?

- How can we find low cost ways to bring hands-on activities and demonstrations to the classroom?

- How can we leave a lasting impact and avoid putting students (or ourselves!) to sleep?

The working EPA scientist role in Science, Technology, Engineering, and Math (STEM) outreach

Many outreach activities at EPA-RTP

DISCOVER-AQ studyImage source: NASA

The emerging world of low cost sensors and electronics – an opportunity for STEM outreach and air science

A growing world of electronics supporting creative projects:

Arduino microprocessor – a simple computer

Lilypad Arduino – electronics meets home ec!

Image: http://web.media.mit.edu/

Example air sensor components:

Nitrogen dioxide sensor(Images courtesy of Ron Williams)

Carbon dioxide sensor Particle sensor

- Some are “raw” components that need additional electronics work (an opportunity to build and learn!)

- Some are ready to turn on and collect data (an opportunity to measure!)

- All are portable, data quality is variable

Particle sensor

Other sensors beyond air:

Motion (accelerometer)

Relative Humidity

Temperature

Design of an air sampler: the basics

Learning how an air sampler is designed: the basic elements

Air sensorComputer (“data in,

display out”)

Data display

Design of an air sampler: the basics Many examples emerging:

display out”)

Data display

CO2 sensor

Carbon dioxide-sensing flower demo

Arduino board

Light-up flowers displaying color based on concentration

Design of an air sampler: the basics Many examples emerging:

display out”)

Data display Wearable

particle sensor

Lilypad board

Wearable sensor with light indicator of concentrations

Particle sensor

Winner of DHHS/EPA’s My Health/My Air contest:David Kuller, Gabrielle Dockterman, and Dot Kelly

Today’s focus: Air sensor kit for outreachSame general design strategy:

display out”)

Data display

Goals:1. Hands-on learning about multiple STEM topics: air measurement science, electronics, computer programming.

2. Real-time and interactive data collection on an air pollutant of interest.

3. A fun, memorable experience that fits within a classroom hour!

Air sensor kit for outreach

display out”)

Data display

Portable “particle monitor” with LEDs lighting up to indicate concentration

Arduino board

Additional components:- Resistors and wires- Small battery- 3 LEDs

Total kit cost:~$65

Reuseable!

1. Give the big picture: EPA’s goal for clean air

“The air in every American

community will be safe and

healthy to breathe. In

particular, children, the elderly,

and people with respiratory

ailments will be protected from

health risks of breathing

polluted air.”

1. Give the big picture: What is Particulate Matter?

Introduction to the basics of air quality, particulate matter, and health

1. Give the big picture: How do scientists measure the air?

Check out our poster!

Amtrak station

Durham freeway Baseball Park

1. Give the big picture: Where would you choose to measure?

2. Primer on measuring particles

Introduction to measuring particles

The particle sensor works by measuring the light scattered by particles…have you ever seen something like this at the movies?

Air intake small white heater resistor visible in this opening

Credit: www.shinyei.co.jp

Image:

Works best oriented up (“hot air rises”)

2. Primer on measuring particles

3. Explanation of the Arduino code

“These are the important pins! One will receive the PM signal, three will control the lights”

“Check the PM signal every 5 seconds”

“Turn these lights on if PM level = …”

Particulate Matter (PM) Sensor

Arduino computer Breadboard for wiring electronics

3 Blocks for structure

4. Explain all the kit components

3 LED lights

3 Resistors

6 short wires 1 longer wire

WIRE COLORS DON’T MATTER

LOOK: one leg is longer!

Battery and clip(you’ll get this last)

EPA Sensor Kits Materials

4. Explain all the kit components

Blue to ~5 on the Arduino

White to ~3 on the Arduino

Orange to 4 on the Arduino

Long Wire to GND on Arduino

Breadboard Connections: Blue wire: A3,~5 on ArduinoOrange wire: A15, 4 on ArduinoWhite wire: A28, ~3 on ArduinoBlack wire: -, GND on ArduinoLED1: E3,F3LED2: E15, F15LED3: E28, F28Resistor1: H3, -Resistor2: H15,-Resistor3: H28,-Notes:-All long legs of LEDs go in column E-All short legs of LEDs go in column F

-Only plug into the Blue “–” bar on the right side of the breadboard

5. Build!

4. Build!

6. What can we do to make the lights turn on?

< Add more pictures >

Air sensor kit for outreach

We’ve tried the kit with:- EPA Air scientists and engineers- EPA-RTP outreach volunteers- Middle school students- High school students - Science teachers

Summary: Air sensor kit for outreach

Hands-on exploration of air quality science and electronics

Memorable and fun activity

Many ways to build out into a lesson plan series:- Programming the Arduino board- Trying to build other sensor systems- Games to understand the basics of computer programming- Designing new ways to show sensor readings

Questions are welcome!

Dana Buchbinder: buchbinder.dana@epa.gov

Gayle Hagler: hagler.gayle@epa.gov

Acknowledgements

Karoline JohnsonEPA-RTP Outreach ProgramEPA ACE ProgramKelly LeovicRebecca DodderRachel ClarkCarol LenoxKatie Lubinsky

Citizen Schools apprenticeship programstudents

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