Daniel Marks on Nostr: Over the past few days, I designed an #opensource #electronics #diy combination ...

Over the past few days, I designed an #opensource #electronics #diy combination #theremin and #metal detector which both use LC resonators. These are pretty much the same circuit, except the theremin capacitance is modified in a theremin by salt water in proximity, and a metal detector inductance is either decreased by conductive objects or increased by magnetic permeable objects (like iron). A two-for-one circuit you may not have anticipated.