--- - 4 Channel Relay Module Library For Proteus Portable

Close Proteus completely and relaunch it.

Download the library files (usually a .ZIP containing .LIB and .IDX files) from sources like Electronics Tree or The Engineering Projects . --- 4 Channel Relay Module Library For Proteus

: Typically located at C:\ProgramData\Labcenter Electronics\Proteus 8 Professional\Data\LIBRARY . Note: ProgramData is a hidden folder by default. Close Proteus completely and relaunch it