لخّصلي

1.When a logic HIGH is applied to the Page 11 of 13

DATA input, the oscillator runs producing a constant RF output carrier wave at 433.xx MHz and when the DATA input is taken to logic LOW, the oscillator stops.In the receiver side, It consists of a RF tuned circuit and a couple of OP Amps to amplify the received carrier wave from the transmitter.Place the 433 MHz RF receiver module in the breadboard to be connected with the second Arduino board.Connect data pin of the receiver to pin number 11 in Arduino board, then connect Vcc and GRD pins to 5V and GRD pins in the Arduino board, respectively.Use USB cable to connect between Arduino and your PC to upload the code for the receiver.2.3.

1. Place the 433 MHz RF receiver module in the breadboard to be connected with the second Arduino board.


2. Connect data pin of the receiver to pin number 11 in Arduino board, then connect Vcc and GRD pins to 5V and GRD pins in the Arduino board, respectively.


3. Use USB cable to connect between Arduino and your PC to upload the code for the receiver.
   RF 433MHz module: The heart of the module is the SAW resonator which is tuned for 433.xx MHz operation. There is a switching transistor and a few passive components. When a logic HIGH is applied to the
   Page 11 of 13

DATA input, the oscillator runs producing a constant RF output carrier wave at 433.xx MHz and when the DATA input is taken to logic LOW, the oscillator stops. This technique is known as Amplitude Shift Keying. In the receiver side, It consists of a RF tuned circuit and a couple of OP Amps to amplify the received carrier wave from the transmitter. The amplified signal is further fed to a PLL (Phase Lock Loop) which enables the decoder to “lock” onto a stream of digital bits which gives better decoded output and noise immunity.
In this experiment we will just send a simple text message using Arduino devices and 433 MHz Rf transmitter module then we will just receive the simple text message using Arduino devices and 433 MHz Rf receiver module.
We have two modules of Arduino Uno for transmitter and receiver in addition to 433 MHz transmitter module and 433 MHz receiver module.