project report on digital tele
TRANSCRIPT
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 1/19
PROJECT REPORT ON
DIGITAL TELE-
THERMOMETER
Submitted by:Priyanka Nanda
Branch:Biomedical
College:Citm,Faridabad
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 2/19
CONTENTS
Acknowledgement
Introduction
Components Required
Features
Operation
Program
Circuit diagram
Technical Specifications
Bibliography
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 3/19
ACKNOWLEDGEMENT
It is with deep sense of gratitude and
reverence that I express my sincere
thanks to my supervisor Mr. O.P.
Bhatia for their guidance,
encouragement, help and usefulsuggestions throughout. His untiring
and painstaking efforts, methodical
approach and individual help made it
possible for me to complete this workin time. I consider myself very
fortunate for having been associated
with the scholar like her. His affection,
guidance and scientific approachserved a veritable incentive for
completion of this work.
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 4/19
INTRODUCTION
Digital telethermometer is
ideal for continuous
monitoring of temperature in
anaesthesia,cardiac,surgery,hy
perthermia, pyrogen testing
and bioresearch.
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 5/19
COMPONENTS REQUIRED
PCB(printed circuit board) andsoldering
Power supply(+5 volts)
Microcontroller(PIC16F873A)
Potentiometer
Capacitors(22pf)
Resistors(2K,1K,10K)
Sensors(LM 35)
Crystal oscillator)
Buzzer
LCD display
Keys
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 6/19
PCB(PRINTED CIRCUIT BOARD)- A printed circuit
board, or PCB, is used to mechanically support and
electrically connect electronic
components using conductive pathways, tracks,
or traces, etched from copper
sheets laminated onto a non-
conductive substrate. It is also referred to
as printed wiring board (PWB) or etched wiring
board.
Power Supply- This circuit is a small +5V power
supply, which is useful when experimenting with
digital electronics.Small inexpensive wall
transformers with variable output voltage are
available from anyelectronics shopand
supermarket.
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 7/19
Microcontrollers - Microcontrollers are single chip
computers.It was developed by Intel Corporation in
1981.It was called as a system on a chip.
LCD(Liquid Crystal Display)-LCD is a thin ,flat display device
made up of number of colour or monochrome pixels
arrayed in front of a light source or reflector. It is often
utilized in battery powered electronic devices because it
uses very small amounts of electric power.
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 8/19
FEATURES
HIGHLY ACCURATE AND
RELIABLE
SIMPLE TO USE
FAST RESPONSE TIME FOR
QUICKLY INCREASING OR
DECREASING THE
TEMPERATURE
CONTINUOUS DUTY
OPERATION
CHOICE FOR 1 TO 12
CHANNELS
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 9/19
OPERATION
The required number of sensor probes
at different sites are attached to this
instrument .The power switch is put on
.Select the particular sensor probe by
means of keys.On pressing theparticular keys the temperature of dat
room is sensed and displayed on the
lcd.this is done one by one for the
room
after sensing temperature of all the
room the buzzer will beep..again the
room temperature will be displayed on
the lcd.we can continue this as manynumber of times as we want.
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 10/19
PROGRAM#include <pic.h>
#define RS RC7
#define EN RC6
#define LCD PORTB
#define LM351 RA0
#define LM352 RA1
#define LM353 RA2
#define KEY1 RC1
#define KEY2 RC2
#define KEY3 RC3
#define BUZZER RC4
//-----------------------------------------
void delay(unsigned long int);
void lcd_cmd_send(unsigned char);
void lcd_char_send(unsigned char);
void lcd_display(unsigned char *s,unsigned char,unsigned char);
void lcd_num_dis(unsigned int,unsigned char);
unsigned char LM35_Sensor(unsigned char );
//--------------------------------------------
unsigned char temp,dis_status=0;
//---------------------------------------------
void main()
{
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 11/19
ADCON1=0x80;
TRISA=0x0F;
TRISB=0x00;
TRISC=0x0F;
BUZZER=0;
lcd_cmd_send(0x38);
lcd_cmd_send(0x01);
lcd_cmd_send(0x0C);
lcd_display("D.T. THERMOMETER",1,0);
lcd_display("MADE BY:PRIYANKA",2,0);
BUZZER=1;
while(1)
{
while(KEY1==0)
{
if(dis_status!=1)
{ lcd_cmd_send(0x01);
lcd_display("ROOM1 TEMP=__^C",1,0);
}
dis_status=1;
CHS0=0;CHS1=0;CHS2=0; //channe0
temp=LM35_Sensor(0x8B);
delay(30000);
}
{ lcd_cmd_send(0x01);
lcd_display("ROOM2 TEMP=__^C",1,0);
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 12/19
}
dis_status=2;
CHS0=1;CHS1=0;CHS2=0; //channe1
temp=LM35_Sensor(0x8B);
delay(30000);
}
while(KEY3==0)
{
if(dis_status!=3)
{ lcd_cmd_send(0x01);
lcd_display("ROOM3 TEMP=__^C",1,0);
}
dis_status=3;
CHS0=0;CHS1=1;CHS2=0; //channe2
temp=LM35_Sensor(0x8B);
delay(30000);
}
if(dis_status!=4)
{
lcd_cmd_send(0x01);
lcd_display("D.T. THERMOMETER",1,0);
lcd_display("MADE BY:PRIYANKA",2,0);
}
dis_status=4;
}
}
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 13/19
void delay(unsigned long int mdelay)
{
while(mdelay--);
}
void lcd_cmd_send(unsigned char mcmd)
{
LCD=mcmd;
RS=0;
EN=1;
delay(25);
EN=0;
delay(1000);
}
void lcd_char_send(unsigned char mchar)
{
LCD=mchar;
RS=1;
EN=1;
delay(25);
EN=0;
delay(1000);
}
void lcd_display(unsigned char *s,unsigned char lcd_line,unsigned char lcd_posi)
{ unsigned char ilcd=0;
if(lcd_line==1) lcd_cmd_send(0x80+lcd_posi);
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 14/19
if(lcd_line==2) lcd_cmd_send(0xC0+lcd_posi);
while(s[ilcd]!='\0')
{
lcd_char_send(s[ilcd]);
ilcd++;
}
}
void lcd_num_dis(unsigned int lnum, unsigned char lposi)
{ unsigned int lunit,lten,lhun,ltho;
lunit=lnum%10;
lnum/=10;
lten=lnum%10;
lnum/=10;
lhun=lnum%10;
lnum/=10;
// ltho=lnum%10;
lcd_cmd_send(lposi);
// lcd_char_send(ltho+0x30);
// lcd_char_send(lhun+0x30);
lcd_char_send(lten+0x30);
// lcd_char_send('.');
lcd_char_send(lunit+0x30);
}
unsigned char LM35_Sensor(unsigned char tposi)
{
unsigned long int H1,L1,F1;
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 15/19
ADON=1;
delay(10);
ADGO=1;
while(ADGO);
H1=ADRESH;
H1=H1<<8;
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 16/19
CIRCUIT DIAGRAM
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 17/19
TECHNICAL SPECIFICATIONS
Temperature rate : - 50 ° to 150 Celcius.
Accuracy/Resolution : Within + 0.1 °C between 20
°C to 50 °C ; rest of range, within 1°C
Response Time : Initially, one minute for thermal
stabilisation; thereafter within 5 seconds for
subsequent variations
Sensors/Probes : IC probe that is encapsulated in
epoxy; easily sterilisable; available in 2 types:-
(a) Internal type, for Esophageal or rectal use;
(b) Surface type, for skin temperature use.
Each sensor is provided with 15 feet cable
Channel Selection : From 1 to 12 channels, as per
individual customer requirements. Selectable bymeans of Rotary switch.
Power Source : 220 or 110 Volts/50 Hz /1 ampere
8/8/2019 Project Report on Digital Tele
http://slidepdf.com/reader/full/project-report-on-digital-tele 18/19
BIBLIOGRAPHY
WIKIPEDIA, the free
encyclopedia
INTERNET resources
Advanced Microelectronics
Electronics Manual of EMTECH
Foundation