DIY 04 Soldering Metal detector

Metal detector uses magnetic theory that through current electricity path. That generates rapid change on magnetic field; magnetic field can make eddy current inside the metal part. Eddy Current can make magnetic field. ...

Then, it will affect the original magnetic field and make the exploration part with sound. The accuracy and the reliability of metal detector depend on the stability of electromagnetic launcher frequency, normally around 80to800khz ...

electric pressure: 4.5V

electric cells:  AAA 3pcs

weight: 50g

packing size: 180x100x50mm