[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 ...

The present IP is a VCC Detector (VDT) circuit, which prevents the possibilities of causing Flash writing failure or internal operation failure by unstable supply voltage. It detects the voltage level ...

The new OpenGate Metal Detector System has been implemented across campuses to “enhance security and streamline our morning procedures,” according to the post. Under the new system ...

Treasure hunting is a good game for family bond; Moreover, through it, you can teach your kids a lot of things, such as reading a map, types of metals, how a metal detector works and how to use it.

PALM BEACH COUNTY, Fla. — School board members on Wednesday discussed the possibility of installing metal detectors in all middle and elementary schools in Palm Beach County. This comes after ...

Metal detectors in schools has been a common suggestion and concern from parents to TMJ4 after school shooting threats continue to rock communities around Wisconsin. MILWAUKEE — Metal detectors ...

The William Floyd School District on Monday began a pilot program testing the use of three metal detectors at entrances to the high school, two months after Suffolk County police charged a 14-year ...

The school confirmed Wednesday metal detectors will be installed in the high school to the tune of $618,000. The school board voted to award the contract for the "weapons detection and screening ...