Turn a calculator into a metal detector
How to turn a calculator into a metal detector Turn a calculator and AM radio into a metal detector with the simple hack demonstrated in this video tutorial. To replicate this hack at home, you'll need the following: (a) a portable AM radio, (b) sticky tape, and (c) a slim portable calculator. For more information on this hack, including step-by-step instructions for rigging your own expedient metal detector, watch this how-to video.