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plzz give me interfacing of barcode reader with 89c51 microcontroller program ....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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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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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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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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i m using at89c52 microcontrollrt to interact with hc-sr04. i have a problem to read the eacho pulse ....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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i want assembly language program for interfacing between 89c51 and LCD display. ....etc

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interface lpc 2148 with hc sr04

The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object like bats or dolphins do. It offers excellent range accuracy and stable readings in an easy-to-use package. It operation is not affected by sunlight or black material like Sharp rangefinders are (although acoustically soft materials like cloth can be difficult to detect). Similar in performance to the SRF005 but with the low-price of a Sharp infrared sensor.

Power Supply :5V DC
Quiescent Current : <2mA
Effectual Angle: <15
Ranging Dis ....etc

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