You're looking for the Proteus library files for HT12E and HT12D.
: Reopen the software and search for "HT12" in the component library. Import via PADS ASCII : If using a newer version of Proteus, you can also use the Import Parts feature under the menu to bring in files in the PADS ASCII v9.5 format. sample circuit diagram to test these ICs in your Proteus simulation? How to Import HT12E and HT12D IC into Proteus 8 4 Nov 2021 — ht12e and ht12d proteus library file download link
often provide download links in their descriptions. These typically require you to download a ZIP file, extract it, and manually import the parts into Proteus 8. Third-Party Platforms : Sites like The Engineering Projects You're looking for the Proteus library files for
Once you have obtained the library zip file (usually named something like HT12E_HT12D_Proteus_Library.zip ), follow these steps: sample circuit diagram to test these ICs in
: If you cannot install a new library, Proteus includes the M145026 (encoder) and M145027 (decoder), which serve as direct functional replacements for the HT12E and HT12D. Installation Guide
If you cannot find a stable external download, you can use these functional equivalents that are usually included in the standard Proteus library: : A compatible substitute for the HT12E encoder.
C:\ProgramData\Labcenter Electronics\Proteus 8 Professional\Data\LIBRARY Paste the Files : Copy the downloaded files into this folder. Restart Proteus