N.M.ELECTRONICS

An embedded system is a special-purpose computer system designed to perform a dedicated function. Since the system is dedicated to specific tasks, design engineers can optimize it, reducing the size and cost of the product. Embedded system is fast growing technology in various fields like industrial automation, home appliances, automobiles, aeronautics etc. Embedded technology uses PC or a controller to do the specified task and the programming is done using assembly language programming or embedded C.

Now more than ever, embedded systems designers are recognizing the value of wireless. From home light switches and entertainment systems to industrial controls to remote monitoring and communications, wireless is permeating an increasing variety of applications that might once have been thought of as either standalone or otherwise happily tethered to a wire of some sort.

            The wireless three phase motor control system operating through remote system comprises of following components like Keypad, radio frequency transmitter, Radio frequency receiver, Microcontroller, Relay, and motor. The keypad contains buttons, according to the function number. That is used different key to variation of motor speed. According to the number we entered through the Keypad, the corresponding code is generated in a matrix form. The respective signal code is then transmitted to the receiver end using RF transmitter in wirelessly. The transmitted signal is then received by RF receiver and it sends to decoder. The signal gets decoded and it is given as an input signal to microcontroller. According to the entered number through keypad, the microcontroller sends the corresponding signal to the relay and control circuit which in turn operates the motor speed according to the condition specified. This type of system will be useful in industry areas, rice mill’s etc; this will have significant importance in these places.

An embedded system is a special-purpose computer system designed to perform a dedicated function. Since the system is dedicated to specific tasks, design engineers can optimize it, reducing the size and cost of the product. Embedded system is fast growing technology in various fields like industrial automation, home appliances, automobiles, aeronautics etc. Embedded technology uses PC or a controller to do the specified task and the programming is done using assembly language programming or embedded C.

Now more than ever, embedded systems designers are recognizing the value of wireless. From home light switches and entertainment systems to industrial controls to remote monitoring and communications, wireless is permeating an increasing variety of applications that might once have been thought of as either standalone or otherwise happily tethered to a wire of some sort.

            The wireless three phase motor control system operating through remote system comprises of following components like Keypad, radio frequency transmitter, Radio frequency receiver, Microcontroller, Relay, and motor. The keypad contains buttons, according to the function number. That is used different key to variation of motor speed. According to the number we entered through the Keypad, the corresponding code is generated in a matrix form. The respective signal code is then transmitted to the receiver end using RF transmitter in wirelessly. The transmitted signal is then received by RF receiver and it sends to decoder. The signal gets decoded and it is given as an input signal to microcontroller. According to the entered number through keypad, the microcontroller sends the corresponding signal to the relay and control circuit which in turn operates the motor speed according to the condition specified. This type of system will be useful in industry areas, rice mill’s etc; this will have significant importance in these places.

            The objective of this project is to control the motor speed of knitting machine. The keypad is used here as a TV remote so we can change the speed of the motor to our desired level. Already we have programmed it in remote control; therefore according to the key press the speed of the knitting machine motor will be changed. The RF wireless communication is takes place in between remote and motor controlling device.

            This project is designed with

Ø  Microcontroller

Ø  Motor

Ø  Control ckt

Ø  D/A converter

Ø  RF Transmitter/Receiver

Ø  Encoder/Decoder

The keypad is connected across the encoder circuit. Encoder which converts analog signal into digital signal for serial communication purpose. Afterwards the converted signal is passed to RF transmitter. It transmits the relevant signal to RF receiver through transmitting antenna.

            In receiver side, we should tune the relevant frequency range similar to transmitter for getting the proper result. So the modulated signal is getting through receiver antenna then it feeds to RF receiver for getting the original signal. Afterwards this signal is given to decoder circuit for converts’ digital signal into analog signal and finally gives to Microcontroller. Here the microcontroller is the flash type microcontroller in which we have already programmed with our objective.

            The output of the microcontroller is connected across D/A converter. The DAC peripheral generates the voltage according to the given data. So the motor present in the knitting machine is energized by it.

1.      Low power consumption.

2.      Economical

3.      Low expensive

4.      Easy to implement

 Embedded System:

When we are traveling in the road for a particular work, if suppose tyre get puncture it will be a big headache to remove the tyre and fixing up the stepney also it is not easy to lift the jack manually in the workshop. This makes the worker to get tired. It’s all a tedious work for the worker. In order to overcome this problem we have designed and developed a system called power jack operating through remote by having full control of the jack, we can easily lift it up and down by using the remote in wirelessly. This helps to reduce the burden of the worker.

            The power jack operating through remote system comprises of following components like Keypad, radio frequency transmitter, Radio frequency receiver, Microcontroller, Relay, and jack.

            The keypad contains buttons, according to the function number. That is, to uplift the jack enter 1, to down lift the jack enter2 to stop in one position enter 3. According to the number we entered through the Keypad, the corresponding code is generated in a matrix form. The respective signal code is then transmitted to the receiver end using RF transmitter in wirelessly.

            The transmitted signal is then received by RF receiver and it sends to decoder. The signal gets decoded and it is given as an input signal to microcontroller. According to the entered number through keypad, the microcontroller sends the corresponding signal to the relay which in turn operates the motor to uplift or down lift the jack according to the condition specified.

            This type of system will be useful in workshop areas, car manufacturing areas etc; this will have significant importance in these places.

              The title of this project is “PEER TO PEER CONNECTION FOR DATA TRANSFER USING RF COMMUNICATION”.  Normally, we connect pc to pc with LAN Network. In our project we connect two personal computers by using RF communication. Here, RF is one type of transmitter and receiver device. This device is used for transmitting and receiving data from one device to another device using Microcontroller.