Have you tried this circuit? first look at the steps of the electric current, on this metal detector

[@fr20041970]

Hello friend, I want the names of the pieces in this diagram and is it good

[@emasbejosamplesimplemetald8703]

the name is bfo metal detector, it is widely circulated on youtube and google. this is wearable but i haven't found the best one, as many circulate. the problem may be on the coil and the transistor. because not everything is explained by them, you try to look at the link below

[@emasbejosamplesimplemetald8703]

th-cam.com/video/YOrb6sx-6tQ/w-d-xo.html
And you can click link on discription at down side this video

[@emasbejosamplesimplemetald8703]

th-cam.com/video/cWzs-flPA3I/w-d-xo.html

[@fr20041970]

Hello my friend, I want the original Russian metal detector diagram from you. Thank you

[@emasbejosamplesimplemetald8703]

I don't have. Thank you for watching.