Digital Logic Sim

Sebastian Lague · 2025-04-17T21:58:52Z

Hi everyone, I was thinking it might be fun to have a playlist on youtube to showcase different things that people have built in the simulation. So if you have something you want to share, just upload a video to yt and drop the link here. Don’t worry about it having to be super elaborate or anything, I think it’s cool to see a variety of projects, both small and large. There’s also no time limit to this — I’ll check back every so often and add any new entries to the list :) If you want to check it out, you can find the playlist over here. (By the way, I’m also planning to show some of these in a video — most probably at the end of my digital logic series. That’s still quite a while away, but I’ll link that here as well once it’s eventually out).

A minimalistic digital logic simulator · By Sebastian Lague

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A topic by Sebastian Lague created Apr 17, 2025 Views: 10,667 Replies: 100

Viewing posts 41 to 51 of 51 · Previous page · First page

mukhash_x861 year ago

My own CPU named "N-16" executing Fibonacci sequence (23 Numbers and one overflowed number)

curlymons1 year ago

I made a 4-bit CPU for fun here, it just needs RAM but other than that it works pretty good.

( Sorry for the bad video quality, I saved it in 1080p but idk what happened here haha )

Crosbyman64364 days ago

Your video quality is fine, it just takes a while for the higher quality part to finish processing.

For the XOR chip, you can actually make one using only 4 NAND chips: the first NAND is connected to both inputs, the second is connected to Input A and the output of the first NAND, the third is connected to Input B and the output of the first NAND, and the outputs of the second and third NAND chips go into the inputs of the final NAND, and the output of that is the final output.

curlymons355 days ago

Yes I actually know that, but that was only after I finished the CPU haha ! :D

Crosbyman64357 days ago

I'm making Tic-Tac-Toe in DSL.

Yes, you read that right, I'm making a fully functional Tic-Tac-Toe game in Digital Logic Sim. I got the input part figured out. Here's a sample:

fishnotfound329 days ago

I am amazed yet scared of what people can do with a game that seems so simple

Sava291 days ago (2 edits)

Really fast CPU with an assembler and Snake. I was working on it for over 50 hours total and made it easy to write new programs for.
You can download it here: https://github.com/Sava-thecoolone/BETTER-CPU

NeevorPL162 days ago

MOS 8501 Replica

wjr614159 days ago (3 edits)

I made a very traditional CPU with the worst wiring mankind has ever seen.
CU has 16 hard wired opcodes: No-Op, load, store, add, subtract, and, or, jump, jump if zero, jump if carry, load literal, output, input, halt, add literal, subtract literal. Memory is limited but with a lot more it could do a lot of cool stuff

421Dungeon100 days ago

i made a 32x32 display with colour offsets that runs extremely fast

421Dungeon95 days ago

first 128x128 20khz display??? also sorry for the spam seb i got really interested all of a sudden and kept creating higher and higher resolutions

Gabriel Kirklin20 days ago

My name is Gabriel Kirklin and I just finished building a fully synchronous 12-hour digital clock inside this simulator starting with nothing but raw NAND gates! Figuring out the layout for the BCD decoders and the Mod-12 hour reset entirely on my own was an incredible puzzle. I made a clean visual breakdown showing how all the custom modules interconnect for anyone else trying to tackle the build:

Viewing posts 41 to 51 of 51 · Previous page · First page

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Digital Logic Sim

YT playlist for community creations Sticky

first 128x128 20khz display??? also sorry for the spam seb i got really interested all of a sudden and kept creating higher and higher resolutions