These documents will help although the applications are different.
Direct vs Remote Liquid Level Sensing (somewhat similar application): www.ti.com/.../snoa935a.pdf
Ice Buildup Detection with FDC2214 (walks through a full system design with the…
Hugo,
There is no TI design for soil sensing. Here are a couple of possibly relevant ones:
Liquid level sensing:
www.ti.com/.../TIDA-00317
Capacitive ice/frost detection:
www.ti.com/.../TIDA-01465
Hello Gabe,
If the change in moisture is produces a capacitance change that is large enough then the FDC can detect it. We have a design that detects ice build-up using the FDC which also explains more of the details. I would recommend taking a look…
Hello,
Thanks for the additional info. The placement and geometry look ok. For the additional questions (if I am reading the chart correctly) it looks like the drift you are seeing is about 600,000 codes / hr or about 10,000 codes / min. Note that each…
