modified 11 years ago

Pollution Detector

00:27:13

The more the resistance, the more the contamination. There should be a LDR instead of first potentiometer. LDR is not available in the library of components.

published 11 years ago

thebugger

11 years ago

Actually a pure distilled water would have a resistance of around 20Mohm per cm. That would make it a pretty good insulator. Every time you pollute the water its resistance will lower. Add a tablespoon of salt to a glass of water and the resistance drops from a few Mohms to only a few ohms (kohms at best) since salt converts water to 2nd type ionised conductor. So your circuit should be inverted. Higher resistance should mean more purity and lower resistance would mean higher pollution.

ETJAKEOC

11 years ago

Also don't forget about the minerals that are required to be in drinking water, those will conduct a bit as well, for distilled water you can have less worries but drinking water is finicky

AdilJamshad

11 years ago

Yeah thanks

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