In many projects we use RF modules for transmit and receive the data because it has high volume of applications than IR. RF signals can travel even when there is an obstruction between transmitter and receiver. It operates at a specific frequency of 433MHz. RF module is of two types: 1. Transmitter 2. Receiver.
RF transmitter receives serial data and transmits to the receiver through an antenna which is connected to the 4th pin of the transmitter. When logic 0 applied to transmitter then there is no power supply in transmitter. When logic 1 is applied to transmitter then transmitter is ON and there is a high power supply in the range of 4.5mA with 3V voltage supply.
Video on 433 MHz RF Transmitter and Receiver:
Features of RF Transmitter and Receiver:
- Receiver frequency: 433MHz
- Receiver typical sensitivity: 105Dbm
- Receiver current supply: 3.5mA
- Receiver operating voltage: 5V
- Low power consumption
- Transmitter frequency range: 433.92MHz
- Transmitter supply voltage: 3V~6V
- Transmitter output power: 4~12Dbm
It has many applications in various areas like Remote lighting controls, long range RFID, wireless alarm and security systems, etc.
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