RF Module (Transmitter & Receiver)

Image: 
RF Module : Transmitter & Receiver

Looking for Electronic Components???  Search 2.5m+ Electronics Products Online:

Microcontrollers        Sensors        Multimeters & Voltmeters        Resistors        7 Segment Displays        Motors & Drives        Potentiometers & Trimmers

Relays        Capacitors        Integrated Circuits - ICs        Encoders        Timers         Batteries       and many more


The RF module, as the name suggests, operates at Radio Frequency. The corresponding frequency range varies between 30 kHz & 300 GHz. In this RF system, the digital data is represented as variations in the amplitude of carrier wave. This kind of modulation is known as Amplitude Shift Keying (ASK).

Transmission through RF is better than IR (infrared) because of many reasons. Firstly, signals through RF can travel through larger distances making it suitable for long range applications. Also, while IR mostly operates in line-of-sight mode, RF signals can travel even when there is an obstruction between transmitter & receiver. Next, RF transmission is more strong and reliable than IR transmission. RF communication uses a specific frequency unlike IR signals which are affected by other IR emitting sources.

This RF module comprises of an RF Transmitter and an RF Receiver. The transmitter/receiver (Tx/Rx) pair operates at a frequency of 434 MHz. An RF transmitter receives serial data and transmits it wirelessly through RF through its antenna connected at pin4. The transmission occurs at the rate of 1Kbps - 10Kbps.The transmitted data is received by an RF receiver operating at the same frequency as that of the transmitter.

The RF module is often used alongwith a pair of encoder/decoder. The encoder is used for encoding parallel data for transmission feed while reception is decoded by a decoder. HT12E-HT12D, HT640-HT648, etc. are some commonly used encoder/decoder pair ICs.
 
Pin Diagram: 
RF Module Pin Diagram, RF Transmitter and RF Receiver PinOut
Pin Description: 
RF Transmitter

Pin No
Function
Name
1
Ground (0V)
Ground
2
Serial data input pin
Data
3
Supply voltage; 5V
Vcc
4
Antenna output pin
ANT
 
 
RF Receiver

Pin No
Function
Name
1
Ground (0V)
Ground
2
Serial data output pin
Data
3
Linear output pin; not connected
NC
4
Supply voltage; 5V
Vcc
5
Supply voltage; 5V
Vcc
6
Ground (0V)
Ground
7
Ground (0V)
Ground
8
Antenna input pin
ANT


APPLICATIONS & TECHNOLOGIES

Learn about the latest applications and industry trends with tutorials and white paper design resources on vertical markets.

Automotive
Energy Harvesting
MEMS Technology
OpenSource Hardware
RFID & NFC
RF Wireless
Sensor
Solar
Touch
Wireless Charging