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Scoop.it!
![[Eric] Talks Crystal Radios | tecno4 | Scoop.it](https://img.scoop.it/V4_jqUZvAxMu5ukNhl40ejl72eJkfbmt4t8yenImKBVvK0kTmF0xjctABnaLJIm9)
The AM broadcast band doesn’t have a lot of mainstream programming on it across much of the United States today. That’s a shame because a lot of kids got their first taste of radio and electronics by building simple crystal radios. [Eric Wrobbel] has a well-done page discussing some of the crystal radio kits and toys that have been around. 
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Scoop.it!
¿Es posible construir una radio con una botella de vidrio y que funcione sin pilas? Por lo visto sí. Como prueba, este proyecto de MAKE que seguro te hará que lo intentes (funciona sin electricidad y además reutilizas una botella).
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