This one differs by using an Arduino to read from the metal detecting coil. The circuit starts with an oscillator that produces a signal of about 160 kHz which is constantly measured by the Arduino.

His valuable and sweeping video walk-through is hiding after the break. A Very Low-Frequency (VLF) detector uses two coils, one to emit and one to receive. They are overlapped just enough so that ...

An international collaboration has shown that additive manufacturing offers a realistic way to build large-scale plastic scintillator detectors for particle physics experiments.

Considered an "old reliable" by hobbyists, the Garrett Ace 300 is an entry-level metal detector with meat-and-potatoes features. It has a large screen, a water resistant coil, and five search ...