Pin-Pointer Metal Detector - Sensitivity
If your a Metal Detector enthusiast or just looking for a handy workshop tool then you'll like this unique handheld pinpointer for narrowing down the specific location of a metal target.
Using four independent search coils, LED colors for signal strength and haptic feedback you can easily discriminate between multiple metal objects.
A great project for budding Arduino enthusiasts.
Project Build here on Instructables https://www.instructables.com/id/Pin-...