The document describes a smart waiter robot project. The robot uses an Atmega8 microcontroller, L293D motor driver, 16x2 LCD display, crystal oscillator, voltage regulator, and DC motors. It is designed to automatically visit tables in a restaurant, ask customers for their orders, and submit the orders to the kitchen. The robot aims to improve customer service by expediting the ordering process. Its use could benefit restaurants by reducing labor costs while providing consistent service.

1. CAREER POINT UNIVERSITY
KOTA (RAJ.)
A
Presentation on
Smart Waiter
(Major Assignment)
Session 2015-16
Submitted To:-
Mr. Pankaj Chawla
HOD Of Electrical Dept.
Submitted By:-
Ishan Jain(K11403)
Vipul Golania(K10829)
Ravindra Fagna(K11797)

2. Table Of Content
1. Introduction
2. Components Used
2.1 Microcontroller Atmega8
2.2 L293D Motor Driver
2.3 16*2 LCD Display
2.4 Crystal Oscillator
2.5 Voltage Regulator IC
2.6 DC Motors
3.Block Diagram
4. Working
5. Advantage
6. Future Scope
7. Conlusion

3. Introduction
In the hotels when any customer arrive then the target of hotel management is to
make their services satisfactory for the customers to increase more benefit.
But when any customer arrive to the hotels then the customer have to wait for
waiter to arrive then and ask them for their order, but many the times the waiter is
busy with other work or engaged with other customers then the customer who
arrived have to wait until any waiter go to them, many times this gives negative
effect to the reputation of the hotel.
In this project we are going to propose a bot which automatically go to the
customer and ask them for their order from every table and submit customer’s
orders for the preparation.

4. Micro Controller Atmega8
The ATmega8 is a low-power CMOS 8-bit microcontroller based on the
AVR RISC architecture. By executing powerful instructions in a single
clock cycle, the ATmega8 achieves throughputs approaching 1 MIPS per
MHz, allowing the system designer to optimize power consumption versus
processing speed.
The device is manufactured using Atmel’s high density non-volatile
memory technology. The Flash Program memory can be reprogrammed In-
System through an SPI serial interface, by a conventional non-volatile
memory programmer, or by an On-chip boot program running on the AVR
core. The boot program can use any interface to download the application
program in the Application Flash memory.

5. Pin Configuration:-

6. L293D MOTR DRIVER IC
Introduction:-
The L293 and L293D are quadruple high-current half-H drivers. The L293
is designed to provide bidirectional drive currents of up to 1 A at voltages from
4.5 V to 36 V. The L293D is designed to provide bidirectional drive currents of
up to 600-mA at voltages from 4.5 V to 36 V. Both devices are designed to
drive inductive loads such as relays, solenoids, dc and bipolar stepping motors,
as well as other high-current/high-voltage loads in positive-supply applications.
L293D is a typical motor driver or motor driver IC which allows DC motor
to drive on either direction. L293D is a 16-pin IC which can control a set of two
DC motors simultaneously in any direction. It means that you can control
two DC motor with a single L293D IC.

7. Pin Diagram:-

8. 16×2 LCD DISPLAY
Introduction:-
The HD44780U dot-matrix liquid crystal display controller and driver LSI
displays alphanumerics, Japanese kana characters, and symbols. It can be
configured to drive a dot-matrix liquid crystal display under the control of a 4-
or 8-bit microprocessor. Since all the functions such as display RAM,
character generator, and liquid crystal driver, required for driving a dot-matrix
liquid crystal display are internally provided on one chip, a minimal system
can be interfaced with this controller/driver.

9. Pin Configuration:

10. Crystal Oscillator
Introduction:-
A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a
vibrating crystal of piezoelectric material to create an electrical signal with a precise
frequency.

11. Voltage Regulator IC
Description:-
The KA78XX/KA78XXA series of three-terminal positive regulator
are available with several fixed output voltages, making them useful in
a wide range of applications. Each type employs internal current
limiting, thermal shut down and safe operating area protection, making
it essentially indestructible.

12. Pin Description:--

13. DC MOTOR
 A geared DC Motor has a gear assembly attached to the motor.
The speed of motor is counted in terms of rotations of the shaft
per minute and is termed as RPM .
 The gear assembly helps in increasing the torque and reducing the
speed. Using the correct combination of gears in a gear motor, its
speed can be reduced to any desirable figure. This concept where
gears reduce the speed of the vehicle but increase its torque is
known as gear reduction.

15. WORKING
In this project we have made a robot which goes to every table. After reaching to
the table the customer have to press button to place the order, if the customer will not
press start button then the robot will automatically goes to the next table and ask them
for the order. If on the next table customer will press the start button then he/she have
to place the order by pressing the reference key, for increasing the quantity customer
have to press the button many times. After completion of the order the customer have
to press the stop button.
After it the robot will go to next table, after completing all the tables the robot
will go to reception and submit them the final list of the orders for the preparation of
the orders.

16. BLOCK DIAGRAM

17. WORKING OF SMART WAITER

18. ADVANTAGES
 In comparison with a human being, a robot-waiter is never tired or sick.
 It does not need salary.
 It will never insult a customer, neither will it make a mess of an order or orders.
 It will never be late for work or in low moods.
 The only thing your robot-waiter will need is regular recharging.
 The restaurant saves salaries and taxes, cuts the service time of visitors. The visitor economizes on tips.
 It saves your waiter expenditure.
 It improves the service time.
 It creates a wow effect. Your café or restaurant will make itself a name. It will be talked about. People
will make pictures there, post the info in social nets, share their reviews with others creating a favorable
image of the venue.
 It helps your guests economize 5-20% on tips enabling them spend more in your venue.

19. FUTURE SCOPE
The robot could be design with the gripper that will pick and
place the objects too. For more precision we can use the image
processing also that could help to use this robot in many
applications.
It moves without lines on the floor or ceiling. Its price is much
less than that of the analogues, which cost many thousands of
rupees.

20. CONCLUSION
As we see the robots are increasingly becoming the part
of everyday life; the use of ROBOT WAITER can be
extend to various functional purposes. We have tried to
implement the robot waiter from the existing appliances
which could be use by elderly people or disabled people
for house service.