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In the Air Design Challenge

11 Posts authored by: janisalnis
Previous post: In-the-Air-Challenge: Air filter checking with a home-built laser+photodiode dust counter Roadtest winners: http://www.element14.com/community/community/design-challenges/in-the-air-design-challenge/blog/2015/03/17/in-the-air-de… Community vote: Community Choice Poll - In the Air Challenge Although invisible, air is the most important in our lives. We can survive days without food and water, but only minutes without breathing. So we should consider air quality seriousl ...
Previous: In-the-Air Challenge:  Texas Instruments MSP 430 FR5969 launchpad Next post: In-the-Air-Challenge: Dust counting with Beagle Bone Black and a webcam I bought three CO2 sensors and Arduino-nanos and gave one to high school students and one to  my collegue Ilja Feschenko who designed a great-looking electrochemical CO2 sensor box using SolidWorks and printed it on a 3D printer. There is USB output to a PC and a line with color LEDs. Simple LED indication is particulary sui ...
Previous post: In-the-Air-Challenge: Laser-based dust counter using a photodiode, IoT connected Next post: In-the-Air-Challenge: AirSchool Project Summary Air in a laminar flow box with 99.999% filter   I have attached a small speaker to the photodiode amplifier of the home-made laser dust counter described in the previous post. Speaker clicks after every dust particle and click loudness is proportional to the dust size. Dust content outside the window in the city is similar to what we ...
Previous post: In-the-Air-Challenge: NDIR CO2 meter connected to IoT via TI CC3200 Wi-Fi connectivity board Next post:  In-the-Air-Challenge: Air filter checking with a home-built laser+photodiode dust counter After trying to count dust using image processing I turned to a classical dust counter approach with a laser and a photodiode. Background materials to read: Measuring dust with a commercial "Dylos" air quality monitor. http://woodgears.ca/dust/dylos.html My device is based on articl ...
Previous post: In-the-Air-Challenge: Exploring internally NDIR CO2 monitor Next post: In-the-Air-Challenge: Laser-based dust counter using a photodiode, IoT connected   EXTECH CO100 air quality monitor has a very compact CO2 sensor module made by SenseAir  that puts out a PWM type signal proportional to concentration. To interface the EXTECH NDIR CO2 monitor with IoT I could very well use the Texas Instruments CC3200 Wi-Fi connectivity board donated by Element 14 for In-the-Air-Ch ...
Previous post: In-the-Air-Challenge: Measuring CO2 levels during lectures with EXTECH CO2 monitor Next post: In-the-Air-Challenge: NDIR CO2 meter connected to IoT via TI CC3200 Wi-Fi connectivity board   Opening the case of made in China EXTECH CO100 air quality monitor reveals a very compact NDIR CO2 sensor made by SenseAir.com (Sweden) type model S8 004-0-0062. Connected to other electronics with just 3 wires: 5V, GND and output signal. On the sensor output signal is present a TTL puls ...
Previous post: In-the-Air-Challenge: Spending the 500 USD parts budget Next post: In-the-Air-Challenge: Inside the air quality CO2 monitor EXTECH indoor air quality monitor model CO100 from Farnell is a great thing to have!   I tested the device during a lecture with ca 20 people. CO2 concentration raised to 2200 ppm after 50 minutes. During the next lecture one window was open to have a ca 10 cm gap and the CO2 concentration stabilized at 1500 ppm. This shows the importance of reaso ...
Previous post:  In-the-Air-Challenge: A sheet of laser light for 2D visualization of dust flow Next post: In-the-Air-Challenge: Measuring CO2 levels during lectures with EXTECH CO2 monitor   Almoust at the last moment I compiled a list of 500 USD budget for the parts of the challenge that amounts ca 430 EUR in Jan. 2015.   I was very impressed that Christian Defeo at Element 14 ordered everything in a couple of hours after I sent him an email with the long list. I was mostly in ...
Previous post: In-the-Air-Challenge: Dust counting with Beagle Bone Black and a webcam Next post: In-the-Air-Challenge: Spending the 500 USD parts budget   Greetings with the New Year 2015! I decided to compose a new blog post this week instead of adding material to the previous post. Because older blog posts people might not check over again.   My collegue Ilja Fescenko came up with an idea  to bounce light between two parallel mirrors allowing to recycle laser power and monit ...
Previous post: In-the-Air-Challenge: Air Quality Sensor Box Next post: In-the-Air-Challenge: A sheet of laser light for 2D visualization of dust flow   Roadtesters for In-the-Air-Challenge received fom Element14 a free Beaglebone Black (BBB) microcomputer with Angstrom Linux on internal 4 GB flash. It has one USB port, where one could connect a HDD and make low power consumtion server for IoT data storing.   Dust particles in air scatter light when illuminated by a powerful LED or ...
Previous: In the Air Design Challenge Next post: In-the-Air-Challenge: Air Quality Sensor Box Introduction Thanks to Element14 and all the sponsors for selecting me as a rodtester for In the Air Challenge.  I have received Texas Instruments Beaglebone Black, MSP430 and CC3200 launchpads and inductors from Wurth Electronik. I registered at AirVantage and received a kind email with their offer to help me during the roadtester.  Cadsoft sent a licence for Eagle that will allow me t ...