ir sensor working principle for eye blink

INTRODUCTION

The eye-blink sensor works by illuminating the eye and/or eyelid area with infrared light, then monitoring the changes in the reflected light using a phototransistor and differentiator circuit. The exact functionality depends greatly on the positioning and aiming of the emitter and detector with respect to the eye.

FEATUTRES

EYE BLINK indication by LEDInstant output digital signal for directlyConnecting to microcontrollerCompact SizeWorking Voltage +5V DC ....etc

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basic of humidity sensor 220 module theory information ....etc

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pdf on humidity sensor seminar topic

Single-Chip Relative Humidity and Temperature Sensors
Silicon Labs Si70xx state of the art relative humidity and temperature sensors utilize proven techniques for measuring humidity using polymer dielectric film along with CMOS mixed signal integrated circuits. These monolithic ICs combine fully calibrated humidity and temperature sensing elements, an I2C or PWM interface and on-chip signal conditioning into a compact, rugged and reliable package.

Humidity sensors from Measurement Specialties are designed ....etc

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PLEASE SEND ME THE DETAILS OF THIS TOPIC ALONG WITH THE PICTURES AND FIGURES..IT WILL HELP IN MY FINAL YEAR HARDWARE PROJECT..KINDLY INFORM ME AS SOON AS POSSIBLE. ....etc

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Hi,
I am looking for a working model of low cost GSM based Temperature & Humidity monitor

Any one who has successfully developed the same or can develop the same please contact me direct.

Cheers
Prakhar ....etc

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i requst this topic becuase my seminar based on this topic. ....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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source code for interfacing humidity sensor with lpc2148

ABSTRACT

In this paper, we describe about the monitoring of Indian agriculture using LPC2148.Monitoring of Indian agriculture is
done using information of the temperature and humidity content. This is mainly used for saving water and monitoring agriculture without human presence. Temperature sensor and humidity sensor will continuously sense the information regarding the field. When the values are less than or greater than the threshold values it will do certain operations. We are usin ....etc

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To get full information or details of sensor in pulsar bikes side stand please have a look on the pages

http://seminarsprojects.net/Thread-tension-less-bike?pid=51290&mode=threaded

if you again feel trouble on sensor in pulsar bikes side stand please reply in that page and ask specific fields insensor in pulsar bikes side stand ....etc

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e=medium] ....etc

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