Diodes Incorporated


A photo coupler is a device include a light-emitting diode (LED) and a photodetector in one package.

It’s not like other optical devices, the light is not emitted outside the package.

The external appearance is similar to that of non-isolators/solid state relays, one channel with 2 inputs and 2 outputs .

Photo coupler is an optical device, but handles electrical signals not handle light.