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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RhydoLabz s LPG Gas Sensor Module is designed to detect the presence of a dangerous LPG leak in your Home, car or in a service station, storage tank environment by interfacing with Microcontroller without ADC Channels and programming. In this version of LPG Gas sensor module two pots are included, one for trigger level setting and the other for setting sensitivity of the sensor. It allows to determine when a preset LPG gas level has been reached or exceeded. The module uses MQ-6 sensor to sense LPG leak. The MQ-6 can detect gas concentrations ....etc

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codes for pir sensor interfacing with pic microcontroller

PIR sensor interfacing with Arduino, in this article I will discuss how to interface PIR sensor interfacing with Arduino. What is PIR sensor? What are applications of PIR sensor? Hardware aspects to consider while interfacing PIR sensor with Arduino UNO R3. Programming used for PIR sensors value reading with Arduino.

Interfacing PIR sensor to 8051 microcontroller.
PIR sensors are widely used in motion detecting devices. This article is about interfacing a PIR sensor to 8051 microcontr ....etc

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hello sir,
iam doing an project on pir sensor to turn on automatically light,for this purpose can u please help me out interfacing pir sensor with 8051 and its embeeded c code ....etc

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RhydoLabz s LPG Gas Sensor Module is designed to detect the presence of a dangerous LPG leak in your Home, car or in a service station, storage tank environment by interfacing with Microcontroller without ADC Channels and programming. In this version of LPG Gas sensor module two pots are included, one for trigger level setting and the other for setting sensitivity of the sensor. It allows to determine when a preset LPG gas level has been reached or exceeded. The module uses MQ-6 sensor to sense LPG leak. The MQ-6 can detect gas concentrations ....etc

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Microcontroller to Sensor Interfacing Techniques

INTERFACING
Interfacing is a term used in electronics when different electronic devices are attached. The term is commonly used when attaching memory chips. Interfacing also often refers to the connection of peripheral devices to computers

MICROCONTROLLER

Overview

Micro-controllers are useful to the extent that they communicate with other devices, such as sensors,
motors, switches, keypads, displays, memory and even other micro-control ....etc

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interfacing of humidity sensor with 8051 microcontroller pdf

Abstract

This project is about a simple humidity sensor based on 8051 microcontroller. Humidity sensor is also called hygrometer. This circuit can sense relative humidity (RH) from 20% to 95% at an accuracy of 5%. The humidity information is displayed on a 16 2 LCD display. A relay is also provided which is set to be active when the humidity crosses a certain trip point. The circuit is mains operated and it is very easy to install. DHT11 is the humidity sensor used here.DHT11 is a ....etc

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The project is intended to provide proper amount of irrigation to agricultural fields by observing the moisture content of soil. The project automates the process of manually irrigating the fields by switching the pump ON/OFF. It is implemented by using an 8051 series microcontroller, programmed such as to collect input signals that measures moisture content of soil through sensing arrangement. Sensing arrangement is made by inserting two stiff metallic rods into the field at some distance. An op-amp is used as a comparator that interfaces micr ....etc

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This is a simple-to-use liquefied petroleum gas (LPG) sensor, suitable for sensing LPG concentrations in the air. The MQ-6 can detect gas concentrations anywhere from 200 to 10000ppm.

This sensor has a high sensitivity and fast response time. The sensor's output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.

This sensor comes in a package similar to our MQ-3 alcohol sensor, and can be used with the breakout board .This c ....etc

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Motion Detection Using the MSP430F2013 microcontroller using PIR sensor
Motion detection using pyroelectric passive infrared ( PIR) sensor elements is a
common method. Here a 16-bit Sigma-Delta ADC is integrated into the MSP430F2013 microcontroller in order to detect motion.

Hardware Design
A system capable of detecting motion using a dual element PIR sensor using the MSP430F2013 microcontroller. the MSP430F2013 provides all the
required elements for interfacing to the PIR sensor in a small footprint, Using the integrated ....etc

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