When designing a PCB layout for optocouplers, it is important to consider factors such as the distance between the LED and photodetector, the placement of decoupling capacitors, and the routing of signal and power traces. In this comprehensive blog, we'll dive deep into optocoupler basics, their working principle, types, applications. In this PCB design optoisolator tutorial, we will discuss how to set up a successful optocoupler PCB layout. Optocouplers or optoisolators are electronic components that isolate input signals. Optocouplers are electronic components that are used to isolate different circuits from each other while allowing them to communicate. In this tutorial, the module is used as an “digital input board”.