RF module

This project is about interfacing RF (Radio Frequency) module with the 8051 microcontroller. These RF 1modules help us in sending and receiving the data wirelessly up to certain distance. This provides us the ease of wireless data transferring. There are many forms of wireless technologies which can transfer the data such as Bluetooth modules, ZigBee modules, and Wi-Fi modules.RF is one of them. It’s a lot cheaper and works quite well for small scale projects. These modules are really easy to deal with. They jus1t require the data to be transferred serially and VCC+GND supply of course. 

Now a day’s everyone needs a device which could control appliances wirelessly. This makes us to operate them on our fingertips from particular vicinity with ease.This time I have done something like this, I have created a prototype of a device which controls 4 devices/appliances separately using RF (Radio Frequency) technology. The device comprises of two sections: Transmitting (remote) and Receiving part. The transmitting part works as a remote device to send the corresponding data to the receiver section. It further consists of 4 SPDT (single pole double throw) switch, one Encoder IC (HT12E) and a TX module (433 MHz). These 4 switches are connected to the 4 data pins of the encoder IC to generate a 4-bit data to be transmitted. The switches provide either high (+5V) or low (0V) signal levels.