MOHAMMAD ABID
ABSTRACT
BLOCK DIAGRAM
POWER SUPPLY
LM324
Relay
AC MOTOR
ADVANTAGES
APPLICATIONS
WORKING PROCEDURE
CONCLUSION
Irrigation is the key to a successful garden. Long gone are the days of manual watering or relying on a friend to water when you are on vacation or away on business.
The Project presented here waters your plants regularly when you are out for vocation. The circuit comprises sensor parts built using op-amp IC LM324. Opamp is configured here as a comparator.
Two stiff copper wires are inserted in the soil to sense the whether the Soil is wet or dry.
The comparator monitors the sensors and when sensors sense the dry condition then the project will switch on the motor and it will switch off the motor when the sensors are in wet. The comparator does the above job it receives the signals from the sensors.
This project uses regulated 5V, 500mA power supply.
7805 three terminal voltage regulator is used for voltage regulation.
Bridge type full wave rectifier is used to rectify the ac out put of secondary of
230/12V step down transformer.
The LM324 series consists of four independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages
Features
Internally frequency compensated for unity gain
Large DC voltage gain 100 dB
Wide bandwidth (unity gain) 1 MHz (temperature compensated) Wide power supply range: Single supply 3V to 32V or dual supplies ±1.5V to ±16V
Very low supply current drain (700 μA)—essentially independent of supply voltage
Low input biasing current 45 nA (temperature compensated)
A relay is an electrically controllable switch widely used in industrial controls, automobiles and appliances.
An electric motor uses electrical energy to produce mechanical energy
Electric motors are found in household appliances such as fans, refrigerators,