Metal detector reviews

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Do you ever find yourself in a situation where you need to sneak your phone through a metal detector? Whether it's a concert, a sporting event, or eve... Check more at https://www.backyardlord.com/how-can-i-sneak-my-phone-through-a-metal-detector/

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UPDATE: Try using BC547 as transistor people have reported problems with 2n2222. Me and my son decided to go treasure hunting with a metal detector that we have but we couldn't find it anywhere. Being proper makers we decided that it would be more fun to build one ourselves rather than keep trying to find it. Most metal detectors uses a search coil that act as part of an oscillator circuit. When metal is put in proximity of the search coil the frequency of the oscilations changes. Many metal…

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