“This instructable aims at making a very basic and simple soil moisture sensor. It could also be used as a cheap replacements to the actual soil moisture sensor modules!!!
It only uses a single transistor(NPN) which makes the project fun and simple !!!!The circuit is very simple and could also be made without using a general PCB.
Circuit schematics is attached !!
Supplies:
- PCB board
- 3V Coin Battery
- Battery Holder
- LED’s
- Soldering Iron”