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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Analog MQ-3 Alcohol Sensor Interface with AVR ATmega16 Micro-controller and LED display. Here, we will interface an MQ-3 analog alcohol sensor with ATmega16 micro-controller and we will show the value of the MQ-3 analog alcohol sensor in the 1X8 LED array.

Since the output of the MQ-3 Alcohol analog sensor is analog in nature and these analog signals can not be processed directly by the ATmega16 micro-controller. Thus, in the first place this signal needs to be converted to digital value to be processed by the micro-controller. The conversio ....etc

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Bulk Micromachined Pressure Sensor



INTRODUCTION
pressure sensors have a wide-range of applications in
various fields, from automotive industry to medical
equipments, such as airbag system and respiratory devices. A
typical piezoresistive pressure sensor consists of two main
components: a diaphragm and resistors. They are two methods
of fabricating these parts: bulk (BM) and surface (SM)
micromachined. In the later one, the diaphragm is built on top
of the substrate surfac ....etc

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how to interface an alcoholic sensor to an 8051 microcontroller ....etc

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pls ,tell us the c coding for interfacing pir sensor with microcontroller at89c51 ....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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Fiber optic differential pressure sensor
A differential pressure sensor system is provided which is an improvement over prior sensor systems. The provided sensor system can be used to determine parameters of fluid flowing through a tubular string in a well.Basically, this system has an optical fiber extending in a wall having a first side and a second side, each of the sides being exposed to pressure in the flow passage.An optical medium is attached to one side of the wall, so that the optical medium detects hoop strain in that side ....etc

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code for interfacing pir sensor with 8051 mcu

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 microcontroller. A practical intruder alarm system using PIR sensor and 8051 microcontroller is also included at the end of this article. Before going in to the core of the article, let s have a look at the PIR sensor and its working.

PIR sensor.

PIR sensor is the abbreviation of Passive Infrared Sensor. It measures the amount of infrared ....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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