An anemometer is an instrument with metallic hemispheres revolving on a vertical rod used to measure speed of the wind. The term “Anemo” is derived from the Greek word which means “wind”. Anemometers are of 2 types; One that measures the velocity of wind and the other the pressure of wind. Wind velocity measurement is a major thing in many industries that deal in rotors of wind mill and its parts. Mostly they measure the wind velocity by using a wired anemometer. In our project, we have used a buzzer that will be activated whenever the wind suddenly stops or the velocity of the wind is lowered. This will give an indication to the Wind Power Station that the wind is not present and the electricity cannot be generated. Thus the operator will come to know about the same.

The figure shows the block diagram of complete communication system, which can be divided into three main sections; namely a master unit, remote unit and signal transmission through free space optics. The remote unit is used to control the master unit. The hierarchy of operation is as follows.For Remote Module.: DTMF Keypad will provide control signal to DTMF Encoder; DTMF Encoder generates the tone frequency signal; IR Transmitter converts the above into a light signal.Free Space Optics: IR Signal generated by IR transmitter to Master Unit through Free space; IR Receiver reads the light signal and converts it into the tone frequency signal; DTMF to BCD decoder convert the above signal to BCD;De-multiplexer provides control signal for required switching. 

We are working on RaspberryPi model B it is a credit-card-sized single-board computer developed in the UK by the RaspberryPi Foundation with the intention of promoting the teaching of basic computer science in schools The RaspberryPi has a Broadcom BCM2835 system on a chip (SoC), which includes an ARM1176JZF-S 700 MHz processor (The firmware includes a number of “Turbo” modes so that the user can attempt overclocking, up-to 1 GHz, without affecting the warranty),VideoCore IV GPU,and originally shipped with 256 megabytes of RAM, later upgraded to 512MB.It does not include a built-in hard disk or solid-state drive, but uses an SD card for booting and long-term storage.In this Project raspberry pi and Arduino UNO are Used. Raspberry Pi is used for sending control signals to Arduino and controlling all the activity of Arduino meanwhile the Ardunio is used for sensing the o/p of LM 35 and all the other sensors which is connected with it.