Brandon's Semiconductor Simulator

brandonli.net

188 points by dominikh 4 days ago


em3rgent0rdr - 4 days ago

When spice simulation isn't deep enough... Very educational to show how circuit elements work "under the hood"...for example the LC example doesn't use an L element and a C element as building blocks, but rather it is the two metal plates in close contact which form the bulk of the circuit's capacitance and it is the loop of metal itself which form the inductance.

paulgerhardt - 4 days ago

Fun. I am reminded of the long forgotten Zachtronics semiconductor game “KOHCTPYKTOP: Engineer of the People” [1]

[1] https://www.zachtronics.com/kohctpyktop-engineer-of-the-peop...

gfody - 4 days ago

Sebastian Lague has been making one of these and youtubing it, the videos are great here's the latest one https://www.youtube.com/watch?v=HGkuRp5HfH8

petermcneeley - 4 days ago

Amazing work feels very similar to Paul Falstad page https://www.falstad.com/emstatic/index.html.

This really needs a WebGPU port. Multigrid on a GPU is moderately easy.

westurner - 3 days ago

Which other simulators show electron charge density and heat dissipation?

Can this simulate this?:

"Synaptic and neural behaviours in a standard silicon transistor" (2025) https://www.nature.com/articles/s41586-025-08742-4 .. https://news.ycombinator.com/item?id=43506198

What about (graphene) superconductors though?

spicybright - 4 days ago

The UI is rough but this is very impressive!

kragen - 3 days ago

This looks exciting, but the images make it look like maybe it's two-dimensional?

showmexyz - 3 days ago

So how accurate are the results?

gitroom - 3 days ago

im super into stuff like this, takes me back to messing with circuit sims for hours

bdbenton5255 - 4 days ago

Very clean, educational and informative. Well done, from one Brandon to another!

- 4 days ago
[deleted]
cyberspacein - 4 days ago

[dead]

mhh__ - 4 days ago

Really sexy