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Metall Detektor Kit Elektronische Kit DC 3V-5V 60mm Nicht-kontaktieren Sensor Board Modul DIY elektronische Teil Metall Detektor DIY Kit - AliExpress
Arduino Metal Detector DIY project - YouTube
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Homemade Metal Detector
456) How To Make A Powerful Metal Detector At Home..Simple Metal Detector By Using Transistor..[Beng… | Metal detector, Electronic circuit projects, Metal detektor
DIY Metal Detector | Hackaday
Homemade metal detector circuit
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Metal Detector Diy Kit Electronic Kit Dc 3v-5v Non-contact Sensor Board Module Diy Electronic Part With Case Shell - Industrial Metal Detectors - AliExpress