diy powerful metal detector | diy metal detector using bc547
3:24
How to make Metal Detector using Multimeter
22:21
How metal detectors work and how to build one
24:42
آموزش کامل ساخت پین پوینتر با هسته فریت و هسته هوا | DIY Metal Detecting: How to build pinpointer
8:59
Making the GP Pointer better?See how
5:32
Simple Metal Detector (Home Made)
22:25
EEVblog #714 - Metal Detector Reverse Engineering
10:23
Diy metal detector | diy accurate metal detector
11:15