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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 €
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:
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 €
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
Nice shielded alu boxes.
IST INNOVATIVE SENSOR TECHNOLOGY P1K0.0805.2P.A SENSOR, PT1000, SMD0805, KLASSE A
7,16 €
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
BELDEN 8723 KABEL, GESCHIRMT 2PAARIG 22AWG GRAU LF.M
1,39 € * 5 meters
Basically similar cable as used for USB.
