Gravity: Analog Capacitive Soil Moisture Sensor-Calculate Amout of Water
Account cancelled 2017-07-10 03:18:23 1341 Views0 Replies Hi everyone,
just got myself one of the Babys mentioned above. Thankfully its working great.
However since my long term goal is to construct a water regulation, i got to find a way to Calculate either the Value of the Soil-Capacitor or to calculate the amount of Water around the Capacitor while avoiding its impedance value...all from the DC-Value measured by the Arduino.
So far ive been trying (aside from google, forum and Traditional Research) to go via the Formulas supplied by TI-Datasheet regarding TLC555-Astable Operation.
Thats also where im Stuck, for the only fomulas thatd work for me (t_L, t_H, T, f) are unknown Variables. If i try to combine them however C is beeing canclled out, and all t's are not absolute anymore...and therefor cant be used in other calculations.
So long story short: Am i overlooking something? is there a way around these Values to get a good idea of the amount of water in the soil (final units preferably in [ml/g], [ml/cm^3] or [%]-volumetric content or something similar)?
Thanks in Advance
Ralf
just got myself one of the Babys mentioned above. Thankfully its working great.
However since my long term goal is to construct a water regulation, i got to find a way to Calculate either the Value of the Soil-Capacitor or to calculate the amount of Water around the Capacitor while avoiding its impedance value...all from the DC-Value measured by the Arduino.
So far ive been trying (aside from google, forum and Traditional Research) to go via the Formulas supplied by TI-Datasheet regarding TLC555-Astable Operation.
Thats also where im Stuck, for the only fomulas thatd work for me (t_L, t_H, T, f) are unknown Variables. If i try to combine them however C is beeing canclled out, and all t's are not absolute anymore...and therefor cant be used in other calculations.
So long story short: Am i overlooking something? is there a way around these Values to get a good idea of the amount of water in the soil (final units preferably in [ml/g], [ml/cm^3] or [%]-volumetric content or something similar)?
Thanks in Advance
Ralf
