23-08-2014, 12:05 PM
TOUCH SCREEN BASED MENU ORDERING & DISPLAYING SYSTEM FOR RESTAURANTS SEMINAR REPORT
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ABSTRACT
In today’s world we have automation in all areas; there is one field where technology not
entered yet. It is the menu display & ordering system & so far there is no initiative to taken to
introduce technology in this area.
Touch-screen based advanced menu display is the method by which anyone will select any
items by their choice which are in menu display & that order will be transferred to the manager
personal computer using zigbee module & that ordered item will be given to that customer.
INTRODUCTION
Touch screens as a popular user interface are more and more common. Applications span
from public information systems to Customer self-service terminals. Thus, as a Logical step,
more and more devices today Feature this kind of user interface, e.g. Bank Automatic teller
machines (ATMs), personal Digital assistants (PADs), mobile phones and displays.
A touch screen is a display that can detect the presence and location of a touch within the
display area.
Lets one do so without requiring any intermediate device, again, such as a stylus that needs to be
held in the hand. Such displays can be attached to computers or, as terminals, to it networks.
Therefore it is very suitable for restaurant & time saving.
PIC MICROCONTROLLER
This unit is the heart of the complete system. It is actually responsible for all process being
executed. It will monitor & control all the peripheral devices or components connected in this
unit. The controller here we use will be PIC16F877A family. The code will be written in Visual
Basic. This unit require +5VDC for its proper operation.
TOUCH SCREEN
A touch screen is an electronic visual display that can detect the Presence and location of a
touch within the display area. The Term generally refers to touching the display of the device
with a Finger or hand.
A. Type Of Touch Screen Technology Used In System
The touch panels themselves are based around four basic screens Technologies: resistive,
capacitive, surface acoustical wave (SAW) and infrared (IR). Each of those designs has distinct
Advantages and disadvantages. The detailed study of each is as Follows:
GRAPHIC LCD
This is smaller version of our serial graphic LCD backpack is solder to the 128*64 pixels
graphic LCD & provides the user a simple serial interface to full range of control.
Besides writing text, this serial graphic LCD allows the user to draw this circle & boxes, sector
reset, individual pixel, erase specific blocks of display control the back light & adjust the baud
rate. There specification as follows:
Voltage: 6v-7v dc
Current: 220ma
I/p : 0-5v, 8 data bits, 1 stop bit, no parity
ZIGBEE MODULE
The past several years have witnessed a rapid development in the wireless network area. So far
wireless networking has been focused on high-speed and long range applications. However, there
are many wireless monitoring and control applications for industrial and home environments
which require longer battery life, lower data rates and less complexity than those from existing
standards. What the market need is a globally denied standard that meets the requirement for
reliability, security, low power and low Cost.
BLOCK DIAGRAM
Working details
Zigbee is a new global standard for wireless Connectivity, focusing on standardizing and
Enabling interoperability of products. Zigbee is a Communications standard that provides a short
range
Applications of ZigBee
The zigbee alliance includes such Companies as Invensys, Honeywell, Mitsubishi Electric,
Motorola, and Philips. Zigbee is built on the robust radio (physical) and Medium attachment
control (MAC) communication Layers defined by the IEEE 802.15.4 standard.
Above this zigbee defines mesh, star and cluster Tree network topologies with data security
features and interoperable application profiles. There are a multitude of standards Like Bluetooth
and Wi-Fi that address mid to high Data rates for voice, PC LANS, video, etc. However, up till
now there hasn't been a wireless Network standard that meets the unique needs of Sensors and
control devices. Sensors and controls don't need high bandwidth But they do need low latency
and very low energy Consumption for long battery lives and for large Device arrays.
Zigbee looks rather like Bluetooth but is Simpler, has a lower data rate and spends most of its
Time snoozing. It is now widely recognized that Standards such as Bluetooth and WLAN are not
Suited for low power applications, which is due to These standards' high node costs as well as
complex And power demanding RF-ICs and protocols. The 4-wire resistive touch screen is a
common type of touch screen. Here, two resistive sheets are separated a small distance.
Electrodes are located along the top and bottom of one sheet and along the left and right of the
other. To detect the vertical coordinate, a voltage is applied to the top electrode and the bottom
electrode is grounded, and voltage is measured at either the left or right electrode. A touch shorts
the two sheets together; the resistance in the vertical direction forms a voltage divider, and the
voltage is read out through the resistance of the other sheet.
RESULTS
The touch screen interface is easier to use than other input devices. It is useful to make
information more easily accessible by allowing user to navigate by simply touching the
display screen.
• The future of touch surface is touch screen video projectors, in a restaurant, for e.g., you
can place your order using the surface of the table as the touch interface, instead of using
a touch screen laptop. The ability to transform any surface in a touch screen means lower
costs, making the technology more cost effective.
CONCLUSION
• Today, a larger share of population is pc literate, yet the touch screen has become
adopted by computer users of all abilities because it is simple, fast, and innovative.
• By the realization of the above proposed system one can learn many aspects of digital
electronics circuit. This will give complete knowledge of designing microcontroller based
system & developing embedded system.