A Project on(2)

7/31/2019 A Project on(2)

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A PROJECT ON

WEATHER STATION DESIGN USING ZIGBEE

under the guidance of

Mr.Rahul

By

Naveen

Janardhan reddy

Rajani Kanth


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BLOCK DIAGRAM:

8052

RS 232

Zig-Bee

LCD

Power

supply

ADC

0808

light sensorclock generator

Humidity

sensor

LM 35


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About our project

The project involves in measuring the

temperature, light and humidity of a remote

area.

the temperature, light and humidity measured

are transmitted through the zigbee.


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ZIGBEE

A very low cost, low power consumption two-

way, wireless communications standard for

automation, toys, & PC peripherals.

ZigBee is a specification for wireless personal

area networks (WPANs) operating at 868MHz,

902-928 MHz, and 2.4 GHz.


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LIGHT SENSOR

A light sensor is a mechanical device sensitive

to light, temperature, radiation level, that

transmits a signal to a measuring or control

instrument.


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How light sensor works

The sensor uses a Hamamatsu S1133 silicon

photodiode. It produces a voltage which is

proportional to light intensity.

If the reading from the sensor reaches the maximum

for the selected ranges, we need to switch to a low

sensitive range.


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Humidity sensor

A humidity sensor senses relative humidity.

Relative humidity, expressed as a percent, isthe ratio of actual moisture in the air to the

highest amount of moisture air at that

temperature can hold.


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How humidity sensor works

The most common type of humidity sensor uses iscapacitive measurement.

This system relies on electrical capacitance, or the

ability of two nearby electrical conductors to createan electrical field between them.


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Temperature sensor

Temperature sensors are the devices used to

measure the temperature of an object or

environment.

These sensors sense the temperature and

generate the output signals in any of the two

forms:change in voltage or change in

resistance.


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Lm 35 as temperature sensor

The LM35 series are precision integrated-

circuit temperature sensors, whose output

voltage is linearly proportional to the Celsius

(Centigrade) temperature.

The LM35 thus has an advantage over linear

temperature sensors calibrated in Kelvin.


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8052 micro controller

The 8052-Basic microcontroller is an easy-to-use, low-cost,and versatile computer-on-a chip. Its ideal for projects

that require more than an assortment of logic gates.


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ADC 0808

The ADC0808 data acquisitioncomponent is a monolithic CMOSdevice with an 8-bit analog-to-

digital converter, 8-channelmultiplexer and microprocessorcompatible control logic.


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REGULATED POWER SUPPLY


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Documents

A Project on(2)