Image: u/william_eggs on Reddit · The KiCad schematic of the wall-switch sensing input
A TVS threshold for an AC optocoupler input, designed with Claude in KiCad
A beginner had Claude drive KiCad and ngspice to design a 110 VAC input that ignores neon-indicator wall switches, and asked electronics forum members to check it before building.
Credits
- Reddit poster william_eggs Source ↗
Earliest dated source:
The full story
A beginner designing a board to sense whether a 110 VAC wall switch is on had Claude drive KiCad and ngspice to design it. The switches are illuminated, so a neon lamp lets a small current through when off, and a simulation showed the first design would read that as closed. The revised design adds a resistor divider and a TVS threshold before the optocoupler. Nothing has been built or powered; the beginner posted the real KiCad schematic for experienced people to check.
How it was done
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Sources
From a short post by the maker, so the details are as they tell them.
- Reddit: Is a TVS-based voltage threshold a sound way to stop an AC optocoupler input from reading a neon-indReddit poster: william_eggsPosted
The forum question with the circuit details.