If some old-timey electronics fun is just what the doctor ordered, then you certainly can’t go wrong building a crystal radio for some electricity-free radio enjoyment.
Courtesy of Make Magazine’s Weekend Project feature, this project hails back to the mid-20th century when no-battery crystal radios were all the rage:
Crystal radio technology has been around for many years. This “bottle radio” take on a crystal radio requires no power source, operates on the power from radio waves, and receives signal from a long wire antenna. As radio stations slowly move away from the AM band, the “window of opportunity” to experience this remarkable technology is dwindling. The “crystal” in question is contained inside a germanium diode, and is used to rectify the radio signal so that our ears can hear it.
Hit up the link below for the full build guide.
Bottle Radio [Make Projects]