| ??? 10/26/05 17:58 Read: times |
#102981 - Conductivity? Responding to: ???'s previous message |
Erik Malund said:
Does anyone have idea(s) about "cheap" means of sensing soil deampness? I suspect that wet soil might be notably more conductive than dry soil. If that's the case, it might be possible to have a simple two probe system, with one probe connected to Vcc and the other connected to the base or gate of a transistor. If the conductivity varies enough, the transistor should be off when the ground is dry, and on when the ground is wet. That said, does anyone know how soil conductivity varies with moisture content? --Sasha Jevtic |
| Topic | Author | Date |
| soil dampness | 01/01/70 00:00 | |
| Conductivity? | 01/01/70 00:00 | |
| Conductivity | 01/01/70 00:00 | |
| addendum | 01/01/70 00:00 | |
| Nutsy idea? | 01/01/70 00:00 | |
| Configuration/calibration | 01/01/70 00:00 | |
| that would not be calibration | 01/01/70 00:00 | |
| humidity | 01/01/70 00:00 | |
| Water for a short while and compare | 01/01/70 00:00 | |
| Another idea | 01/01/70 00:00 | |
| Spatially Distributed Soil Measurements | 01/01/70 00:00 | |
| I needed that | 01/01/70 00:00 | |
| There is Yet Hope | 01/01/70 00:00 | |
| soil dampness | 01/01/70 00:00 | |
| Gypsum block sensor | 01/01/70 00:00 | |
Capacitance. | 01/01/70 00:00 |