Green technology : build an electronic soil moisture sensor to conserve water

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deleted-641946
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Green technology : build an electronic soil moisture sensor to conserve water

Post by deleted-641946 »

Why will the bulb glow when the soil is dry ? And not when it is wet even though when wet soil offers less resistance.
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LeungWilley
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Re: Green technology : build an electronic soil moisture sensor to conserve water

Post by LeungWilley »

Hi,
Please take a look at the explanation for "Q: How does the circuit actually work? What is the circuit diagram?" (about half way down the page)

https://www.sciencebuddies.org/science- ... water#help

Hope this helps. Please post again if there's anything else we can help explain, etc...
Good Luck and Have fun with your experiment!
Willey
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