The optoelectronics, often referred to as optotronics,
deals with the transmission of signals using light.
Optoelectronic components emit light or are able to detect light.
Through a variety of applications
the optoelectronics has become an integral part of daily life.
Light-Emitting Diode (LED)
Light-emitting diodes (LEDs) are semiconductor devices used as a light source
with a number of advantages over common light sources.
Therefore, they have become part of your everyday life.
In an optocoupler signals are not transmitted electrically,
In this way,
you can send signals between two completely electrically isolated circuits.
This has many practical advantages.