There is no official HT12E/HT12D library from Labcenter Electronics (Proteus developer).
You must download a third-party library created by users.
If you can't find a pre-existing library, creating your own is an option:
Datasheet Reference: Use the datasheets of HT12E and HT12D to understand the pinout and functionalities.
Proteus Library Creation Tool: Proteus provides tools and guidelines for creating custom libraries. You can create a new library by defining the component's graphical representation and its simulation model. Ht12e And Ht12d Proteus Library File Download
Simulation Models: Depending on your needs, you might only need a graphical representation for schematic capture, or you might need to develop a behavioral model for simulation.
If you cannot find a working library, you can simulate using an Arduino or PIC with the same encoding/decoding logic, or create a schematic component with a virtual terminal.
.LIB and .IDX files (or .HEX if provided).C:\Program Files (x86)\Labcenter Electronics\Proteus 8 Professional\DATA\LIBRARYC:\Users\YourUserName\Documents\Proteus 8 Professional\LIBRARY.LIB and .IDX files into that folder.HT12E or HT12D in the "Pick Devices" (P) window.⚠️ Warning: 3rd party models often simulate only the digital encoding/decoding but not the oscillator (external resistor) or precise timing. They are fine for logic verification but not for real-world timing. Creating Your Own Library If you can't find
Proteus comes with a vast library of generic and specific microcontrollers (PIC, AVR, 8051), op-amps, and logic gates. However, Holtek’s specific encoder/decoder pair is considered a "specialized IC" outside the scope of the standard library. Labcenter Electronics (the creator of Proteus) does not ship these models by default. Therefore, you must manually add a third-party library.
Important Warning: Downloading random .IDX, .LIB, or .HEX files from unverified sources can corrupt your Proteus installation. This guide will direct you to reliable sources and explain how to verify the files.
C:\Program Files (x86)\Labcenter Electronics\Proteus 8 Professional\DATA\LIBRARY
C:\ProgramData\Labcenter Electronics\Proteus 9 Professional\LIBRARY
(Note: ProgramData is a hidden folder. Type it manually in the address bar.) Datasheet Reference : Use the datasheets of HT12E
Once you have the components in your workspace, here is a quick guide to setting them up in the schematic.
You need to paste the downloaded files into the correct folder so Proteus can "see" them.
Program Files (or Program Files (x86)) -> Labcenter Electronics -> Proteus X Professional -> LIBRARY.
LIBRARY inside the Proteus installation folder.