I Found a Big Gold AGGIE Ring Deep Underwater while Metal Detecting (Returned to Owner) While scuba diving in the river, using my underwater metal detector, I found some incredible finds ...

[Dzl] and his rather serious looking son are metal detector enthusiasts. But when they couldn’t find their store-bought metal detector earlier this summer they just went ahead and built their own.

If you think of a metal detector, you’re probably thinking of a fairly simple device with a big coil and a piercing whine coming from a tinny speaker. [mircemk] has built a more modern adaptation.