使用Arduino Uno的自动植物浇水系统

使用使用Arduino Uno的自动植物浇水系统的自动植物浇水系统

Components and supplies

Arduino UNO

× 1

1N4007 – High Voltage, High Current Rated Diode

× 1

General Purpose Transistor NPN

× 1

Water tube

× 1

Glue gun

× 1

Weter container

× 1

Bread board

× 1

Soil Moisture Sensor

× 1

In this system, soil moisture sensor senses the moisture level of the soil. If soil will get dry then sensor senses low moisture level and

automatically switches on the water pump to supply water to the plant. As plant get sufficient water and soil get wet then sensor

senses enough moisture in soil. After which the water pump will automatically get stopped.

I have used a self made water pump in this system using 5 volt DC motor. I could use 12 volt water pump in the system but to

operate this, it will require a relay module. So, to reduce all these hardware complexity, I made DC motor based water pump using

diode, transistor and registers combined circuit which operates DC motor according to the Arduino code.

Circuit description:

1. DC motor using water pump:

I use DC motor to make water pump. DC motor has two leads one is positive and another one is negative. If we connect them

directly to the Arduino board then it will damage the board. To overcome this problem, NPN transistor is used to control the

The soil moisture sensor consists of two leads that are used to measure volume of water content in soil. These leads allow the

current to pass through the soil and in return calculates the resistance value to measure the moisture level. If there is more water in

soil then soil will conduct more electricity, means less resistance value along with high level of moisture. In the same manner if there

is less water in soil then soil will conduct less electricity, means high resistance value along with low level of moisture.