Metal Detectors and Sensors Circuits

BFO Metal Detector:

Metal Detector #1:

Metal Detector #2:

Metal Detector #3:

Metal Detector #4:

Metal Detector uses Single IC: 12/12/97 EDN-Design Ideas 

Simple Metal Detector:

Twin Loop Treasure Seeker:

Metal Detector Circuit

Metal Detector Circuit 2

Single Chip Metal Detector Circuits

Metal Detector DIY Circuit

Metal Detector Circuit Diagram

Simple Metal Detector Circuit Diagram