Hello friends, I hope you are doing well. This is the thirteenth tutorial in our series on how to create a Proteus library. In the previous tutorial, Proteus Simulation Models Explained , we met the four kinds of simulation model and saw that our Traffic Light Module still has none: Pick Devices labels it No Simulator Model, and a simulation stops with "No model specified". Today, we give it its first working model. Our topic is how to add a SPICE model in Proteus . We will write a small SPICE subcircuit for the module, attach it to our part with four properties in the Make Device wizard, copy the model file to the right folder and test the result with ammeters at 5 V and at 3.3 V. Then we make three typical mistakes on purpose and read the messages Proteus gives for each, pack the model i ...