1. In above circuit diagram two ICs are used whichare L298 & micro-controller IC 89C5.
2. L298 IC is known as driver IC this IC is used to drive the motor. In the given circuit diagram two L298 IC are used.
3. The 1st L298 IC is used to drive the motor that are connected to wheels.
4. Pin number 2 and 3 of IC are connected to motor M1 & M3 and another 2 pins i.e, 13&14 are connected to motor M2&M4.
5. Another motor is connected to the L298 IC. The motor is connected to the pin no 2&3. This IC is connected to the spray nozzle.
6. When we apply power supply to the IC motor rotates clockwise the spray nozzle turns up & when the motor rotates anticlockwise the spray nozzle turns down. As this way the IC control the spray nozzle.
7. Micro-controller IC 89c51 is the main IC of the circuit. It controls all the operations of the circuit.
8. Ports P1.0 to P1.3 are connected to first L298 IC pin no. 5,7, 10,12 and another two terminals P1.4 & P1.5 are connected to another L298 IC Pin number 5 & 7
9. The pin XTAL1 & XTAL2 are connected to crystal oscillator.
10. The relay & valve are connected to pin no P2.0.The pin EA are connected to the VCC & the VCC are connected to the EA.
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