PC817 2 Channel Optocoupler Isolation Module

Electrical isolation matters whenever a signal needs to cross between circuits running at different voltages, or simply needs protecting from noise and ground loops on the other side, and the PC817 optocoupler handles that by passing the signal through light rather than a direct electrical connection. This 2-channel board covers the smaller jobs that don't need the full 4-channel module already in the catalog, keeping the board footprint down when only one or two isolated signals are actually required.