There are two groups of classic circuits: those which have served us well in the past, but have been superseded by better designs, and those which are still in use, perhaps with updated components. In ...

Here, we are going to build small circuit named metal detector circuit which is used to check the persons in shopping malls, cinema halls, etc. to ensure that person is not carrying any explosive ...

We spent weeks testing the best metal detectors on the market. Here are our top six picks. Purchasing one of the best metal ...

ZDNET experts put every product through rigorous testing and research to curate the best options for you. If you buy through our links, we may earn a commission. Learn Our Process 'ZDNET Recommends': ...