Contents
What are RF transmitters?
The radiofrequency (RF) transmitter is the generator of the radiofrequency current which is delivered to the transmitting coil. This creates a signal which is used to excite protons in the imaging field. Radiofrequency coils can be both transmitters and receivers of the radiofrequency signal or receivers alone.
What is RF transmitter used for?
An RF transmitter module is a small PCB sub-assembly capable of transmitting a radio wave and modulating that wave to carry data. Transmitter modules are usually implemented alongside a microcontroller which will provide data to the module which can be transmitted.
How is a RF transmitter connected to a receiver?
RF transmitter receives serial data and transmits to the receiver through an antenna which is connected to the 4 th pin of the transmitter. When logic 0 applied to transmitter then there is no power supply in transmitter.
How to use Arduino Nano for RF transmitter?
The circuit diagram for RF transmitter using Arduino Nano is given below. Here a potentiometer is connected to vary the values to be sent to receiver using the RF transmitter. The circuit diagram for RF receiver using Arduino Nano is shown below. Here we have a series of LEDs.
How are RF modules used in Arduino microcontroller?
The receiver receives the data through an antenna and gives the data to the microcontroller connected to it. These RF modules operate at a specific frequency of 433MHz. RF signals can travel between transmitter and receiver even when there is an obstruction. These modules are used for short range, low- budget, simplex-based communication.
How are RF signals converted to serial format?
The encoder converts the parallel signals to serial format and transfers them through the RF transmitter at a rate of 1 to 10kbps. The signals are decoded back to parallel signals by the decoder IC HT12D after being received by the receiver. The signals after being inverted are then applied to the motor driver IC, to drive the motor.