AVR Programmed controller with L293D motor drive ic and solar panel charging a battery.

1. GUIDED BY : Mr. PANKAJ CHAWLA
(HOD. ELECTRICAL DEPT. )
SUBMITTED BY : UTKARSH SHARMA K10702
PARIDHI PAMNANI K11453
SHAHINA KAGZI K10707
( BTECH , EE – 6TH SEM 3RD YR )
MAJOR
ASSIGNMENT

2. FULLY AUTOMATED SOLAR GRASS
CUTTER

3. Project Description
 Solar Operated Grass Cutter Bot
 Our project is a battery powered automatic Grass
cutter.
 Initially the user will control the Grass cutter along a
desired path and the mower will record the
movements in order to later replicate them
autonomously through AVR Programming.
 It will have a solar powered charging station that will
act as the starting and ending point of the moving
and cutting process.

4. BLOCK DIAGRAM

5. CONNECTIONS

6. Function List
 Grass Cutter will have the ability to be controlled Automatically.
 It will be able to store the desired moving path in memory
 It will have wheels that control forward and backward movement
as well as turning
 Interaction between mower, Solar station, and control unit
 Solar power to large battery to mower batteries
 Automatic shut-off if it tips over.
 Micro-controller to interact with and control other components
(motors for blades/wheels, Solar component, and power
management circuit.)

7. Possible Extra Features
• Integrated scheduling of mower.
• Disable the mower if it leaves its designated mowing
area.
• Automatic moving and turning through the 500ms
delay given.
• The regulation of AVR voltage through 7805 voltage
Regulator.

8. Feasibility
 Our members consist of three EE students.
 We have previous experience with microcontrollers
and moving of robot with sensors and motor drivers
from prior Projects.
 Sound programming experience.
 Possible outsourcing of chassis construction and
mechanical functionality

9. More In-depth Look

10. System Implementation
 AVR will be the communication protocol used by
Programming .
 Two L293D motor drivers for controlling wheels
movement and turning.
 Battery voltages will be monitored using the UPS
converters via solar plates into the microcontroller
and motor drivers.
 Switches for set and Reset of system.

11. Risks
 Mechanical issues (motor mounting, frame retrofit) –
enlist mechanical major’s help.
 Motor issues (possible magnetic interference,
excessive power consumption) – might need to shield
motors, use smaller motors and lighter frame.
 Extra supply of current more than 1.5 m amp.
 Shorting of battery and solar panel wires.
 Bot size to inherit Turning Issues.

12. APPLICATIONS
 For Playgrounds (cricket ground, football ground etc.)
 For House gardens
 For small farms
 For nurseries

13. ADVANTAGES
 Compact size and portable
 No fuel cost
 No pollution
 Easy to move from one place to another
 Less wear and tear
 Non-skilled person can also operate

14. DISADVANTAGES
 Blade failure
 Manually operated
 Difficult to operate in rainy seasons

15. THANK YOU