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#metal_detectors
#turn_radio_into_a_powerful_metal_detector
#making_powerful_metal_detector
#making_gold_detector
#صناعة_كاشف_الذهب_والمعادن
#تحويل_الراديو_إلى_كاشف_الذهب_والمعادن
#turn_radio_into_a_metal_detector
watch how to make simlpe inverter circuit 3,7V to 220V
• How to make simple inv...