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Electronic Metal Detector DIY Kit MQ 2 Gas Sensor for H2 Optocoupler isolation safeguards your expensive Optocoupler isolation safeguards your expensive development boards and microcontrollers Purchase the 5V 0 Build your own fully functional metal detector from scratch with this comprehensive DIY kit from The Engineer Store This hands on kit provides all the essential components needed to assemble a working metal detector capable of sensing metallic objects
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