This kit is being designed to bring the RF technology (range limited wireless communication) in use that is a widely used wireless communication system. It is used in different applications in different forms like security systems, attendance systems, wireless control unit, etc. In this system, we are using this technology to make a wireless remote through which we can control the door in a definite range without touching the door.
The authenticated user who knows the password will have to send a particular sequence of code (password) from the remote end, as soon as the code matches the door will be opened for a definite time interval and will be closed automatically.
There are two sections of this system; one is transmitter end and the other one is the receiver end. At the transmitter end, there is an encoder IC that encodes the 4-bit data and transmits it with a wireless device working at 315/434 MHz At the receiver end RF receiver receives the data with antenna and feeds these data to the decoder IC. The decoder IC decodes the data in 4-bit mode and the microcontroller checks the data sequence with these 4 bits. The display unit is an LCD of 16×2 sizes. It is used for proper user interaction. If the sequence entered is correct the door opens for the person to enter for a while and then automatically closes.