Questions tagged [soil-sensing]

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How to calculate soil moisture in a plant field with ground nodes that intersect?

I have placed 5 soil moisture sensors in my field where potatoes are growing. These soil moisture sensors give me correct soil moisture readings up to 400 meters radius from where they are placed. ...
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3 answers
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What is the purpose of the diode in this peak detector?

I was reading about a capacitive soil moisture sensor circuit today, and came across the following diagram: (Diagram taken from the Cave Pearl Project, https://thecavepearlproject.org/2020/10/27/...
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RS485 MODBUS ARDUINO: Print multiple response data frame from soil sensor

Hi everyone. I'm guiding myself from tutorial https://how2electronics.com/measure-soil-nutrient-using-arduino-soil-npk-sensor/ I'm using... Hardware components: RS485 Arduino uno Charger 9V (Only for ...
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Why are my soil sensor outputs starting correct, but turning into nonsense?

I have two Adafruit STEMMA Soil Sensors STEMMA Soil Sensors that I've hooked up to an Arduino nano, telling a solenoid valve when to open. I also have a rain sensor and photoresistor to determine the ...
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3 answers
131 views

Wire gauge for sensor at long distance

I am planning for a home irrigation system and confused with the wire gauge required the sensors on the plants. The circuit diagram would be something like below: (Please consider the sensors as ...
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2 answers
51 views

Soil Humidity sensor value rising over time

So I have this soil humidity sensor placed in a pot. It's about half way in soil, cause that's how deep the pot is. I'm trying to get a pump to trigger once the soil dries out below 20%, but ...
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Measuring soil moisture and using a vintage DC ammeter as the indicator

I have a vintage Weston Model 506 DC ammeter (it has a range of 0 to 20 amps) that has been sitting in my office and I think it would be interesting to use it as a soil moisture indicator for a (long ...
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416 views

Strange capacitive soil moisture sensor readings

I am in the process of building an automated irrigation system using capacitive soil moisture sensors and Arduinos. My challenge comes in with the soil moisture sensors bought from Banggood.com. I ...
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5 votes
1 answer
164 views

Measuring soil resistivity and estimating soil equivalent resistance in a long distance

I'm trying to size the Neutral to Ground resistor (NGR) in the Wye of a 138 KV to 4160 V Delta-Wye Transformer. In order to find the proper value I have estimated the charging current of the system by ...
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4 answers
523 views

Voltage Dividers for a beginner (with respect to soil moisture sensors)

I've just started with electronics and want to make an analogue soil moisture sensor (with Arduino). When I looked online for an explanation of the working, every site said that it works as a voltage ...
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2 answers
1k views

Soil moisture sensor - Interdigital (FEF) vs Coplanar

I am working on the development of a low cost capacitive soil moisture sensor which uses dielectric permittivity changes to estimate moisture. I found that interdigital capacitor based on FR-4 has ...
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PCB layer material on soil sensors

I am interested in making a DIY PCB soil sensor based on 555 timer IC. The circuit works well but I have problems with regard to manufacturing a durable PCB. As I keep the PCB based soil sensor ...
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