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Hello everyone, here's the combination of my Plant Humidity Detector and how to shrink and arduino
When light's green, plant doesn't need water
If we take off an electrode to simulate a lack of water, the light turns into red.
Inside the device, we have an ATtiny85 PIC which has enough pins for this small application
For the electricity source, I use a basic phone charger
The device has been working for a couple of months with no problems
For details, see links in the video description and thanks for watching