[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.

Using the Arduino ADC and DAC features to realize a full-fledged multichannel anayzer with only a few common components allowed to operate a used NaI scintillation counter (from Ebay) and compare the ...

So let's get started Building an Arduino speed detector using IR technology to measure the speed of a moving object is much more cost-effective, and it is also very simple to build. All you need are a ...

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 ...

Speaking of metal detectors, it’s the small differences between models that can make a huge difference overall. Some products perform excellently on relic hunts while others work well on detecting and ...

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 ...

An open-source hardware enthusiast has shared their latest project, a 3D-printed, Arduino-powered Wall-E replica. This personal project, in… ...

Copyright 2025 The Associated Press. All Rights Reserved. Malcolm Weale was in a farmer’s field with his metal detector when he unearthed a tiny and dirt-covered ...

Need a new metal detector to have a high-quality detecting experience for a fraction of the cost? Let us help you! We’ve chosen the best metal detectors in the low and mid-range prices. And below, are ...

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 ...