LTspice Creating and Working with Symbols

In LTspice you can create a symbol automatically in two situations; either you have a subcircuit definition in ASCII format at hand or you want to create a hierarchy with your own schematics which are building blocks for larger designs. Hierarchical schematic drafting in particular offers powerful advantages by enabling larger circuits that can be drafted in a single schematic while retaining the clarity of the smaller schematics. Additionally, repeated circuitry can be easily handled in an abstract manner, i.e. black boxes, with full functionality and can be re-used across several schematics.

[@ruiLiao-r8n]

My graduation design tutor gave me the task and left me alone. There are no relevant video resources on the Internet in China .Your video saved my graduation project and thesis，thanks！！❤fromChina

[@VIVEHAANBURAJAN]

Been searching for a long time for this method, thanks a lot

[@darrellhambley7245]

At 0:39 on the video you suddenly show a file opened. Please explain HOW you got there, What keystrokes on what menu resulted in that screen. Did you open LTspice first? Did you point your cursor on the file first then right clicked "open"? This is a tutorial. If we already knew ho to get to that screen, we wouldn't need a tutorial.

[@kbruin79]

Awesome tutorial. Thank you

[@hassan_a9]

I've watched many videos about ceating a new component using LtSpice. Everyone starts from here 0:36 but I want to know how to find this model or how to include it in my Ltspice!

[@jiwu8438]

File-open and choose all files then you can find the new model you want to open in LTspice same as the video

[@mohamedarrach3688]

@@jiwu8438 the subcrt created does not have the same form as that I found in the library.

[@JuampaXXI]

The circuit definition can be downloaded from many different websites. Manufacturers usually make this models and distribute them for free, just look (for example) "LM741 Spice Model" and you'll find many sites to download the model.

[@qzorn4440]

very interesting. I would like to simulate an AD202kn analog devices isolation transformer. looks like a 3rd party model is the only way to go?? thanks a lot.

[@toto09774]

i have downloaded one model which is lmr16006, but once i am opening the model and i want to create the symbol , i will find that the create model choice is not activated in the list,, what is the reason for that inactivated and how i can create the symbol and i added to my circuit

[@afiafariha7129]

Did you find the solution to this problem?

[@SAIRUPAAMARAVATHID]

Sir plzzzzz tell how to import spice model transistors nr100 ,pr100 into ltspice

[@darrellhambley7245]

Hello Sair. I see that you've asked this question on various tutorial videos. I have also tried to ask questions but, nobody answers. All of these "How To" videos are created by people who do not know how to teach. They think we already know.

[@toto09774]

Thank you so much