DIY metal detector

I was really surprised that this simple hack doesn’t even require taking anything apart! Just use a calculator and AM radio to make a metal detector – [via] Link.

UPDATE: This one might be plausible, folks. Debate in the comments; the first one to prove it’s real/fake gets a MAKE pocket ref!

Related:

• Metal detectors @ NYC toy fair – Link.
• Build you own metal detector – Link.