Comments on: Handheld Metal Detector Repaired https://jestineyong.com/handheld-metal-detector-repaired/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Mon, 12 Jan 2026 06:54:28 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: Yogesh Panchal https://jestineyong.com/handheld-metal-detector-repaired/comment-page-1/#comment-455707 Mon, 12 Jan 2026 06:54:28 +0000 https://jestineyong.com/?p=36635#comment-455707 MP,
This device works on the magnetic field created by the coil inside, zeners are used for the safety of the charging circuit,customer is using a normal 9v battery so i have not focused on the charging circuit (customer is not using a rechargeable battery as it takes 16hrs to charge).
Just like a mobile phone, you can select beep mode and vibrator mode by selecting the sliding switch position.

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]]> By: Yogesh Panchal https://jestineyong.com/handheld-metal-detector-repaired/comment-page-1/#comment-455706 Mon, 12 Jan 2026 06:43:52 +0000 https://jestineyong.com/?p=36635#comment-455706 In reply to Mark J.

Thank You! Mark J

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]]> By: Yogesh Panchal https://jestineyong.com/handheld-metal-detector-repaired/comment-page-1/#comment-455705 Mon, 12 Jan 2026 06:43:25 +0000 https://jestineyong.com/?p=36635#comment-455705 In reply to Albert van Bemmelen.

Yes Albert,
It can detect any kind of metal, the device I received for repair is used in commercial offices to prevent people from carrying USB pen drives and other storage devices so that sensitive data of the companies does not go out.

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]]> By: Yogesh Panchal https://jestineyong.com/handheld-metal-detector-repaired/comment-page-1/#comment-455704 Mon, 12 Jan 2026 06:35:27 +0000 https://jestineyong.com/?p=36635#comment-455704 In reply to Parasuraman S.

Yes sir, this device is commonly used in shopping malls & other sensitive locations for security reason.

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]]> By: MP https://jestineyong.com/handheld-metal-detector-repaired/comment-page-1/#comment-455692 Sun, 11 Jan 2026 19:33:56 +0000 https://jestineyong.com/?p=36635#comment-455692 Thank you Yogesh for saving the metal detector from unwarranted bangs, Most hand-held electronic gadgets develop internal circuit disconnections because of falling, or mishandling for that matter. All I could imagine was that, inside the gadget was a magnet and a sensor(s) of sorts. It has never crossed my mind that such an item may be having such an electronics-components-filled board as shown. The board looks overly protected, with zener diodes just in about every other circuit. Evidently, the 9v battery used is rechargable since there is a 'DC IN' socket near the bottom-right corner probably for the purpose of charging. Though you never confirmed if charging was okey. Mobile phones have speakers that serve obediently both as a vibrator and a speaker, suprisingly, often times set to function simultaneously as we all know.

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]]> By: Mark J https://jestineyong.com/handheld-metal-detector-repaired/comment-page-1/#comment-455687 Sun, 11 Jan 2026 17:42:54 +0000 https://jestineyong.com/?p=36635#comment-455687 Yogesh I have never repaired or worked on one of those before. Good job.

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]]> By: Albert van Bemmelen https://jestineyong.com/handheld-metal-detector-repaired/comment-page-1/#comment-455681 Sun, 11 Jan 2026 15:35:29 +0000 https://jestineyong.com/?p=36635#comment-455681 Good job on fixing this assumably some sort of knife or gun detecting safety detector.

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]]> By: Parasuraman S https://jestineyong.com/handheld-metal-detector-repaired/comment-page-1/#comment-455678 Sun, 11 Jan 2026 13:46:07 +0000 https://jestineyong.com/?p=36635#comment-455678 First time I am seeing the inside of such a device and how it functions, though I have heard of it. Many thanks for sharing your fix, dear Yogesh Bai!

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