There is an interesting sensor that is capable of measuring the air quality in bathrooms/toilets. It is used in (surprisingly) unexpensive room-sprays to automatically trigger the spray for better air quality if it is necessary.
thats the sensor: http://ams.com/content/download/686543/1787717/AS-MLV-P2_Datasheet_EN_v2.pdf
that is the room-spray: Air Wick Freshmatic Max Automatisches Duftspray - Starterset - Tag am Meer, 1er Pack (1 x 250 ml): Amazon.de: Drogerie &…
that is an (german language) article about the topic: Wider dem Mief | Make
Combining such type of sensor with a microcontroller gives a ton of possible applications:
- automatically open windwow to improve air quality
- connect some indicator light or display, attached to the door outside to indicate if it might be better to wait
- connect a bluetooth module that allows to discretely check the air quality by smartphone from remote
if a critical level is exceeded:
- switch on a siren to tell the neighborhood
- use internet connection to automatically download tips for nutrition and print it on attached thermoprinter
- compare with historical data for alltime highscore (ok, I know, bad taste of fun)
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