Receiver Module
From Physical Programming
Receiver Module
The receiver module is a device that will receive input that can be demodulated and decoded into usable information. The receiver does this by picking up or tuning in on a frequency obtained from an antenna and uses electronic filters to locate the signal wanted. A receiver can be used to turn the signal into usable information such as;
- digital photos
- navigation positions
- sound
- digital data
The receiver is widely used across the shelf in many devices but mainly being used to pick up radio signals for sound. The development of the device or the idea that electromagnetic existed was first shown in a demonstration by the German Heinrich Hertz who used spark gap equipment to receive radio signals. The first radio receiver was designed by Alexander Stepanovich Popov. He was the first to demonstrate the practical application of electromagnetic (radio) waves.
The radio receiver also was developed using a crystal allowing it to pick up on radio signals and only being powered by the radio waves it picks up.
A crystal radio receives programs broadcast from radio stations. Radio stations use sound waves to modulate the amplitude of radio waves and transmit them from their antennas. Radio waves from all stations in range of the receiver travel across the crystal radio antenna and induce electric current between the antenna wire and the ground wire. A tuner circuit is used to select the radio-frequency energy from just one station. The crystal detector recovers the original sound frequency current from the radio frequency carrier. The earphones then convert the recovered audio-frequency current back into sound.
RECEIVER I PURCHASED The receiver that I bought from Jaycar is a pre-built 433MHz wireless transmitter/receiver modules and is ideal for devices using short data burst such as a remote control, trigger pulses etc.
Specifications:
Output power: 3dBm. Supply voltage: 3V. Supply current: 10mA max. Data rate: 300bps to 10kbps. PCB measures: 42(H) x 11(W)mm (excluding pins).
