Sign up for Keysight World: Innovate at https://keysig.ht/enJywf and learn about the visions of tomorrow, before fiction becomes reality!
With few incidents, I think I made what is called a BFO metal detector, which actually works very well over a large distance.

Get your ElectroBOOM Bundle at https://www.circuitspecialists.com/el...
My new MERCH: https://electroboom.creator-spring.com
Thanks for your support @   / electroboom  

Post your submissions to:   / electroboom  

My Facebook:   / electroboom  
My Twitter:   / electroboomguy  
My other articles: https://www.electroboom.com/

Thanks to Circuit Specialists for proving my essential lab tools, my referral link: https://www.circuitspecialists.com/?r...

Also thanks to Keysight for their awesome scopes and meters: http://keysight.com

And thanks to Lulzbot for 3D printer and filaments: https://lulzbot.com

Checkout my Amazon picks (my affiliate link): https://www.amazon.com/shop/Electroboom

Below are my Super Patrons with support to the extreme!

Nicholas Moller at https://www.usbmemorydirect.com
Sam Lutfi
Zoddy
Ambiance Domotique

My sponsors and top patrons: http://www.electroboom.com/?page_id=727

Enter your school for tools: https://goo.gl/forms/VAgRre8rLVvA1cEi2

By: Mehdi Sadaghdar

0:00 Wrong Way of Detecting Metal
1:48 Theory Behind How Metals Effect Inductance
6:10 More Fake and Real Metal Detector Video Tutorials
7:32 Designing a “Simple” Metal Detector Circuit
15:48 Testing the DIY Metal Detector Circuit