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Build Your Own Metal Detector with an Arduino - LEKULE BLOG
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![Simple Metal Detector Circuit Diagram using 555 Timer IC](https://i2.wp.com/circuitdigest.com/sites/default/files/circuitdiagram/Metal-Detector-Circuit.jpg)
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![Build A Four Transistor Metal Detector | Nuts & Volts Magazine](https://i2.wp.com/www.nutsvolts.com/uploads/wygwam/NV_0208_Florian_Figure01.jpg)
![BFO Metal Detector using LF347N - Measuring_and_Test_Circuit - Circuit](https://i2.wp.com/www.seekic.com/uploadfile/ic-circuit/2012913211433839.jpg)
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![Build Your Own Metal Detector with an Arduino - LEKULE BLOG](https://i2.wp.com/www.allaboutcircuits.com/uploads/articles/metalDetectSchematic.jpg)
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![BFO Metal Detector - Gadgetronicx](https://i2.wp.com/www.gadgetronicx.com/wp-content/uploads/2017/12/metal-detector-circuit.png)