Reference Design of Infrared Signal Transmitter and Receiver

 

Principle: 
The principle of this design bases on the sound caused by infrared (laser) vibration. The laser oscillation signal is received at the receiver infrared receiver diode circuit, and demodulates the signal reaches the sound reduction. It uses sound to make infrared (laser) turn on and off. The infrared receiver receives the beam of light on the receiver circuit diode. The IC (LM386) is used for signal amplification of speaker sound.
Transmitter schematics:

 

The receiver schematics:
 


Transmitter PCB Layout:
 

Receiver PCB Layout:


Transmitter 3D-view Stimulation:
 
Receiver 3D-view Stimulation: