Is it possible to build a radio from a glass bottle and run without batteries? Apparently yes. As proof, this MAKE project which will surely make you try (it works without electricity and you also reuse a bottle).
It is rated as’Featured Project‘which means that for the MAKE team, this is exceptional. The video shows you step-by-step instructions to build the radio. You need very little material: a board, nails, a few meters of cable and of course a bottle. Once you’re done, you’ll have AM radio that you can listen to anywhere there’s access to the airwaves.
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This is a good start to becoming fond of creating things by the “do it yourself” (DIY) procedure. In fact, there are many ways to make a crystal radio, developments from radio to galena; It’s just one of them. If you can find a 365pF variable capacitor, you can try making a crystal radio like this.
Via Treehugger
