ROBOTIC LAWN MOWER

ROBOTIC LAWN MOWER

Authors:

Mazratul Firdaus Mohd Zin, Fatimah Nur Mohd Redzwan, Ahmad Syazani Muda, Ahmad Syahiran Ahmad Kamal, Abdul Muhaimin Abd. Nashir

Overview

Robotic lawn mower is a wheeled grass cutter which is remotely controlled by the user during its operation. The robotic lawn mower operates like a remote controlled toy car with an additional motor attached with a sharp blade which is able to trim the grass for small grass field or garden.  The input signals from the user are needed to control the robot. The lawn mower is controlled by the remote controller using 315MHz radio frequency module as transmission media. The remote control (transmitter) uses HT12E encoder IC to encode the signal to be sent to the HT12D decoder IC on the robot (receiver). Once the signals are decoded, they are sent to L293D motor driver IC to move the motors.

Figure 1: Robotic Lawn Mower (Top View)  

      

                Figure 2: Robotic lawn Mower (Front)

Objectives

• To keep the consumers at ease while maintaining their garden/ lawn.
•  To save money by not having to pay gardener.
•  To avoid nerve and tissues damage due to the vibration produced by conventional  lawn mower.
• To reduce air and sound pollution.

Methodology

Specification:

Supply Voltage          :9 V (DC)

Operating Frequency : 315 MHz

Output Voltage           :5 V (DC)       

Decoder                      : HT12D

Encoder                      : HT12E 

    

                      

                                   Figure 3: Robotic Lawn Mower  Operation  

      

           Figure 4: Schematic Diagram of Transmitter

      

   Figure 5: Schematic Diagram of Receiver

Conclusion

The robotic lawn mower is significant for the consumers in various aspects. It could lessen the consumers’ work load in grass trimming as well as maintain their garden/lawn. The robotic lawn mower is cheaper than the conventional lawn mower available in the market. The nerve and tissues damage can be avoided when using this prototype as well as it is environmental-friendly.