I teardown a commercial, handheld breathalyzer and discuss how it works, then test a standalone ethanol sensor.
http://www.seeedstudio.com/depot/images/product/MQ303A.pdf
http://www.kosmodrom.com.ua/pdf/MQ303A.pdf
http://www.sparkfun.com/products/8880
http://www-personal.umich.edu/~mswool/publications/Gas_Sensors_preprints.pd.pdf
Monday, February 24, 2014
Monday, February 10, 2014
Self-cleaning glass windows
Alien technology? No! A thin coating of titanium dioxide on your windows will use the UV in sunlight to burn away dirt and wash itself clean with rainwater.
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