In-the-Air-Challenge: Spending the 500 USD parts budget

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 interested in optical CO2 meter. Price for it varied a lot at Farnell webshops in different countries. I used prices from Germany website http://de.farnell.com/ to add up to 430 EUR. And that was fine. No added VAT. Thanks a lot to Farnell.  The parts arrived to my home address with UPS truck in a couple of days. They were sent from UK location.

EXTECH INSTRUMENTS  CO100  METER, CO2, 9999PPM, 99.9%

197,71 €

http://de.farnell.com/extech-instruments/co100/meter-co2-9999ppm-99-9/dp/2081081?ost=co100&categoryId=700000005821

I will use this near-infrared non-dispersive type CO2 sensor to compare with electrochemical CO2 sensor module. NDIR sensor is callibrated against NIST traceable device, accuracy 75ppm or +-5%.

Good <800 ppm
Normal 800...1200 ppm
Bad >1200 ppm

First tests in the sleeping room at home showed that air was OK bad during the night 700...800ppm. In a confined space like a toilet CO2  content rised to 2000 ppm within 5 minutes. I will test the device during the lecture with ca 20 people this week.

This model has an empty battery compartment and USB hole is not populated. I will try to see if there is some place inside where analog voltage could be accessed with MSP430 or CC3200 and sent to IoT over Wi-Fi.

TEXAS INSTRUMENTS  OPA350UA  OP-VERST., HIGH-SPEED, R/R-I/O, SOIC 350

2,35 € * 4 pieces

http://de.farnell.com/texas-instruments/opa350ua/op-verst-high-speed-r-r-i-o-soic/dp/1106197

This single-supply OPamp I plan to solder this week in a home-made dust particle counter to amplify photodiode signal after schematics in paper:

A. Morpurgo et al , "A low-cost instrument for environmental particulate analysis based on optical scattering"

ANSMANN  1209-0000  STROMVERSORGUNG AC/DC, APS600 TRAVELLER

19,42 €

http://de.farnell.com/ansmann/1209-0000/stromversorgung-ac-dc-aps600-traveller/dp/1973938

Adjustable voltage 3...12V in steps. Current 600 mA. switching power supply adapter.

RASPBERRY-PI  RPI CAMERA BOARD  RPI KAMERA-BOARD, 5MP, MIT FLACHKABEL

19,25 €

http://de.farnell.com/raspberry-pi/rpi-camera-board/rpi-kamera-board-5mp-mit-flachkabel/dp/2302279?ost=RASPBERRY-PI+-+RPI+CAMERA+BOARD+-+RASPBERRY+PI+CAMERA+BOARD%2C

I would like to test this camera with RPi and compare with USB camera Logitech C270 that I use on Beagleboard/Rpi.

HAMMOND  1590B  DRUCKGUSS-GEHÄUSE, 60.5X112X31MM

7,01 € * 2 pieces

http://de.farnell.com/hammond/1590b/druckguss-geh-use-60-5x112x31mm/dp/3061590?ost=HAMMOND++1590B++ENCLOSURE%2C+INSTRUMENT%2C+ALUMINIUM

Nice shielded alu boxes.

IST INNOVATIVE SENSOR TECHNOLOGY  P1K0.0805.2P.A  SENSOR, PT1000, SMD0805, KLASSE A

7,16 €

http://de.farnell.com/ist-innovative-sensor-technology/p1k0-0805-2p-a/sensor-pt1000-smd0805-klasse-a/dp/1266951

This platin wire sensor is good for absolute callibration of other sensors.

SAMSUNG  MMCTR08GUBCH-RMLMK-FARN/KIT  SPEICHERKARTE, MICRO-SD, NOOBS, JAVA 8GB

7,58 €  * 3 pieces

http://de.farnell.com/samsung/mmctr08gubch-rmlmk-farn-kit/speicherkarte-micro-sd-noobs-java/dp/2428393

BELDEN  8723  KABEL, GESCHIRMT 2PAARIG 22AWG GRAU LF.M

1,39 €    * 5 meters

http://de.farnell.com/belden/8723/kabel-geschirmt-2paarig-22awg/dp/1218667?ost=BELDEN+-+8723+-+SHLD+CABLE%2C+2+PAIR%2C+22AWG%2C+GREY%2C+PER+M&categoryId=700000006049

Basically similar cable as used for USB.