Dear sir..
I know d working principle of ir sensor but its range is vry low so I cannote use it in some project..
So pls give me some idea about ultrasonic sensor..
1.how to interface with AT89c51/52
2.assembly language prog to glow an led when any body infront of the sensor..
Kindly help me sir ....etc

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To get full information or details of ultrasonic sensor hc sr04 with 8051 please have a look on the pages

http://edutwint-ultrasonic-sensor-based-dc-motor-control-using-labview

if you again feel trouble on ultrasonic sensor hc sr04 with 8051 please reply in that page and ask specific fields in ultrasonic sensor hc sr04 with 8051 ....etc

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hey.. i am doing a project on deistance measurement uisng hc sr04 and want to show the simulation using proteus..but i couldn't get hc sr04 on proteus or couldn't design a package for it.. i'm very much glad and
thankful for any of your suggestions ....etc

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interfacing of ultrasonic sensor to 89c51 with keil codes

#include

#include
// for using _nop_() function
#define port P2
#define dataport P0
sfr16 DPTR =0x82;
sbit trig=P3^5;
sbit rs=port^0;
sbit rw=port^1;
sbit e=port^2;


void delay(unsigned int msec)
{
int i,j;
for(i=0;i for(j=0;j<1275;j++);
}

void lcd_cmd(unsigned char item) // Function to send command to LCD
{
dataport = item;
rs= 0;
rw=0;
e=1;
delay(1);
e=0;
return;
}

void lcd_data(unsigned char item) // Function to send data to LCD
{
dataport = ....etc

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hc sr04 pic code

#include <16F877.h>
#device adc=8
#FUSES NOWDT, HS, NOPUT, PROTECT, NOBROWNOUT, NOLVP, NOCPD, NOWRT, NODEBUG
#use delay(clock=20000000)

/**
/ Used sonar - HC-SR04 & DYP ME007
/ If you are using DYP ME 007 or any other 5 pin sonar, Please note that not to take the
/ pin named 'out'. Take echo instead.
/ Pin configuration (5 pin)- VCC(+5) TRIG(Trigger pin) ECHO(Output pin) OUT(Not needed) GND (Ground)
/ Pin configuration (4 pin)- VCC(+5) TRIG(Trigger pin) ECHO(Output pin) GND (Ground)
/
/ Code by Bhanu Watawan ....etc

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assembly language code for interfacing AT89c51 with GSM modem. ....etc

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hello ..i am making project on ultrasonic cane..and i wanted to interfere with hcsr04 (ultrasonic cane) with atmega16 and i wanted to program it. please help sir. ....etc

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it a good site for students who need help when required
i need this code . as soon as possible . i have to work on this ultrasonic hc-sr04 module ....etc

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hc sr04 interfacing with 8051 coding in c

Ultrasonic range finder using 8051
ADMIN on December-18-201261 COMMENTS
Ultrasonic range finder using 8051.
Simple ultrasonic range finder using microcontroller 8051 presented in this article. This ultrasonic distance meter allows you to measure distances up to 2.5 m with an accuracy of 1 Centi meter. AT89S51 microcontroller and ultrasonic sensor module HC-SR04 forms the basis of this scheme. Ultrasonic module sends a signal to an object, then lifts her echo and the shape of the waves of time period wh ....etc

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distance finder based on at89s52 and ultra sonic sensors hc sr04

Ultrasonic range finder using 8051 .
A simple ultrasonic range finder using 8051 microcontroller is presented in this article. This ultrasonic rangefinder can measure distances up to 2.5 meters at an accuracy of 1 centi meter. AT89s51 microcontroller and the ultrasonic transducer module HC-SR04 forms the basis of this circuit. The ultrasonic module sends a signal to the object, then picks up its echo and outputs a wave form whose time period is proportional to the distance. The ....etc

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