This electronic circuit is useful for your plant. How it's work ? simple.. It will beeping when your plant soil is dry and stop when it detect water..that all.. It hard ? Don't worry, it's simple circuit construction.See circuit diagram above. You just need 5 resistors,2 transistors, a LED ,Buzzer and battery of course.
Step1: Prepare your
components
Resistor R1,R3 = 1M R2,R5=1K R4= 100 ohm
LED
Transistor TR1,TR2 - C9013
Buzzer
9v Battery Clip
Steel rods[or nails] - 2
Veroboard
Learn how to place your component,
make sure your component is well
placed and connected follow the
electronic circuit diagram
www.shamradesign.net