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.

DAM CONTROLLER TECHNOLOGY (DCOTECH) By : Mazratul Firdaus Mohd Zin,  Fatimah Nur Binti Mohd Redzwan, Farid Zuhri Kamal, Hazwani Zawawi, Irfan Arif Mohd Zaher OBJECTIVES          To prevent floods and provide a good reservoir in residential areas.       To warn the residents to be more prepared when flood happens. Figure 1 : The PCB layout of DCOTech       Dam Controller Technology (DCOTech) is designed to detect and control the water level in a  roof-mounted tank or any other reservoir at residential areas. This system monitors the water  level of the tank and automatically switches OFF of the motor when tank is in EMPTY state.                                                                                                     METHODOLOGY Figure 2 : The flowchart of DCOTech        The motor is switched ON when the tank is in FULL state. More specifically, a microcontroller is used for water level sensing and controlling maneuver for the DCOTech. The microcontroller detects and senses the water level at three level which are LO, AVERAGE, and HIGH. Water level management approach could help reducing the water overflow and possibility of flash floods. In this project, an embedded automatic water level controller has been implemented to control the water level of water reservoirs and tank. Arduino UNO is used in the project as the controller to switch ON/OFF the motor accordingly and the output is presented with LEDs. The GREEN LED lights up if the water level is at LOW level, YELLOW LED lights up when the water is at AVERAGE level and RED LED lights up when the water level is at HIGH LEVEL.