You can also import specific IC models from SnapMagic (formerly SnapEDA) , which provides schematic symbols and PCB footprints for a wide range of components. How to Install the Library in Proteus 8
Since direct links change, use the following proven method: Ht12e And Ht12d Proteus Library File Download
I have packaged the files into a ready-to-use ZIP. You can also import specific IC models from
The HT12E RF encoder and HT12D RF decoder are essential integrated circuits (ICs) for building wireless remote control systems. However, Labcenter Electronics Proteus does not include these ICs in its default component library. Ht12e And Ht12d Proteus Library File Download