I made a little digital circuit simulator that operates on PNGs
This is a little toy project of mine that lets you simulate digital logic graphs. It was inspired by Minecraft's Redstone and the Piet esolang. It's got some serious drawbacks-- you write circuits as PNGs and simulate them with a Python interface. It's slow to run and slow to experiment with. And it is certainly difficult to use for people with any kind of color blindness. But despite that, I hope this can still be a fun toy!
I made a little digital circuit simulator that operates on PNGs launched on February 3, 2022 with 259 votes, #86 of 2,645 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 4 years on.
In plain words
This digital circuit simulator enables users to design and test logic circuits by creating PNG image files, then simulating them through a Python interface. Inspired by Minecraft's Redstone and the Piet programming language, it allows experimentation with digital logic graphs. The tool has performance limitations and accessibility challenges for colorblind users, but serves as a creative toy project for those interested in circuit design and visual programming concepts.
written from the facts on this page · September 2026
From the sources
Reso: A visual circuits programming language using pixels. - lynnpepin/reso
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