Bathroom fan that switches itself on when it gets steamy or smellyNovember 28, 2012


Brandon Dunson developed his own bathroom fan trigger based on stinky or humid air conditions. The initial inspiration for the project came from a twitter-connected fart sensing office chair. Hiding behind the character display you can see the MQ-4 methane gas sensor which he picked up for the project. But since there’s also a shower in the bathroom he included a humidity sensor with the project. Both are monitored by an ATmega328 which averages 10 readings from each sensor before comparing the data with a set threshold. If the sensors read above this level a relay turns on the bathroom fan.

Via: DFRobot, Source: Hack a Day

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