Reminds me of "A Canticle for Leibowitz".

https://en.wikipedia.org/wiki/A_Canticle_for_Leibowitz

A very inaccurately timed civilization.

Thats on you for not consulting the tolerance band on your resistors.

I'm reminded of this: https://www.electronicdesign.com/technologies/analog/article...

Imagining an ancient theological order with ranks based on color coding...

that could easily pervert to racial castes, but get the cargo-cult vibe, of trying to induce the "benign ones" to come back

Needs to be stone monoliths!