[zaphod] had to research how a metal detector actually works. After reviewing the pros and cons of various approaches, the decision was made to go with a beat frequency oscillator (BFO) circuit.

Fig. 1 displays the author’s prototype of the detector. Fig. 1: Author’s prototype of Vehicle Theft Detector Fig. 2 shows the circuit diagram of the vehicle theft detector. The system is built around ...

The best circuit type for a metal detector to run is the LC circuit, also called tank circuit. How deep do most metal detectors go? Most metal detectors can deeply search coin-sized objects from 6 to ...

You have once bought a metal detector sugar-coated with glowing praise but then ending up with a shallow and second-rate one that can not seek any signals of the underground treasure? You are stuck in ...

One such weapon that can prove very useful for taking on stronger Pals in Palworld is the Advanced Bow, which is one of the ...

A graphic representation of the steps in a forming process. Each upbend of the "flower" represents the change that the flat strip of metal has made after it has gone through a pass in a tube mill or ...

A key part of being prepared for winter weather is knowing what to do when things go wrong, like when the power goes out.

Michigan winters bring freezing cold and long nights, and residents respond by raising the thermostat and stringing up lights. But officials say all that power and heat leads to more home fires this ...

Learn how phase noise impacts a radar system’s performance and about a way to improve it using a voltage-controlled SAW ...

Jan. 2, 2025 — A research team has developed a method for extracting gold from electronics waste, then using the recovered precious metal as a catalyst for converting carbon dioxide (CO2), a ...