Sounds like a flavor‑activated analog puzzle. I’d start by sniffing a few common spices and hooking each to a simple chemical sensor that trips a relay when the right volatile hits it. Think old‑school reed switches, not touchscreens. We’ll wire a ladder‑logic circuit, keep the lock bolt mechanical, and add a little bell‑type indicator so you know when the right note is found. Ready to dig into the spice‑chemistry and pull out a retro lock?