Rubbermaid gas generating aroma unit teardown

A very unusual air freshener that uses electrochemical generation of gas to push aroma liquid to a wicking material at a programmable rate. It creates a controlled smell silently for a very long time.

It uses a similar system to the industrial grease dispensers, where a button cell similar to standard zinc-air cells has been optimised for the generation of gas by depriving it of the oxygen needed for normal operation. When bridged with a resistor, it passes current and creates gas that can be used to pressurise chambers or depress plungers at a controlled rate. The value of the resistor sets the speed at which that happens.
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