Rf module 2262/2272 is a set of wireless radio frequency receiver and transmitter having 4 channels on the receiver in the form of pins and 4 inputs on the transmitter in the form of buttons which control the said 4 channels on the receiver. Each input button controls a specific channel on the receiver. This module works best within a range of 3-5m.
How does the module work?
The transmitter operates at a voltage of 12V DC transmitting at a frequency of 315 MHz and the receiver operates at a voltage of 5V DC.When a key is pressed on the transmitter it starts sending information or data packets at a frequency of 315 MHz which contains unique ID indicating which button on the transmitter was pressed,this unique ID is different for all the 4 buttons and is pre programmed and thus cannot be changed. The receiver module stores this value and responds accordingly by sending a signal of high value that is greater than 3.3V to the channel corresponding to that transmitter button which has stored that unique value. Below is a table which will tell us which receiver channel will respond, to which input button of the transmitter remote.
|Transistor input button||Receiver channel|
This module is capable of working independently to control 4 devices however it can also be used with a microprocessor based development kit according to our needs. The output pins on the channel are high as long as we are pressing the corresponding button on the transmitter. However we can program our microprocessor or microcontroller in such a way that a certain device is ON when a button say A is pressed and is switched OFF when another button say B is pressed, in such a case however the receiver pins ( i.e. D0,D1,D2 and D3 ) will send digitally high signals to the pins of your development board which in turn will send a signal to the output devices connected to its own (development board ) pins. In conclusion the pins of the receiver will be connected to a controller which will also have the output devices connected to it. To use the module independently we simply send a signal from the transmitter and the receiver acts on it and controls the device or component connected to the pins.
How to use the module
•Connect the AC bulb to a wall socket.
•Connect one terminal of the bulb to the normally open pin and the common pin of the relay from the same wire.
•Connect the VCC pin of the relay to a 5V supply, in this case we are connecting the VCC to 5V pin of the motor driver which gives an output voltage of 5V.
•Connect the ground of the relay to common ground.
•Connect the signal pin of the relay to D3, the bulb will glow when we press the button C on the transmitter in this case.
•Connect the motor driver (L298N) to the DC power supply of 12V (Here we are using a 12 V power supply because our motor has an operating voltage of12 V, consider your DC supply according to your needs).
•Connect the 5V pin of the motor driver to the 5V pin of the receiver to supply power to the receiver.
•Connect the GND pin of the receiver to the commonground.
•Connect the two terminals of the motor to the motor driver.
•Connect IN1 pin of the motor driver to the D2 of the receiver, this will enable the motor to move in one direction when A is pressed on the transmitter remote.
•Connect IN2 pin of the motor driver to D0 of the receiver, this will enable the motor to move in the other direction when B is pressed on the transmitter remote.
•Connect the negative terminal of the LED to the common ground.
•Connect the positive terminal of the LED to D1 ofthe receiver with a 330 ohm resistor in between them to regulate the current going through the LED. This
will allow to switch the LED ON when we press the button D on the transmitter remote.
•Follow the schematic given below to easily assemble the aforementioned circuit.
# To use the transistor remote unscrew the back panel and insert a small 12V, 27A electric cell and close the panel.
•Wireless remote access for doors
• Car alarm systems
• Wireless home security systems
• Simple camera control
• Medical services like bed control and bells for staff