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the instructions for making a diy project with rolls of tape and some other items
Crystal Radio: A Science Kit for Student Electronics | Science Buddies Blog
"Crystal Radio: A Science Kit for Student Electronics": Build a crystal radio and then tune in an AM radio station--without batteries. An improved crystal radio kit and an updated procedure makes this a great choice for an assigned #science project or just for hands-on #electronics fun! [Source: Science Buddies,] #STEM #scienceproject #crystalradio
an old fashioned sewing machine on a purple carpeted floor with a blue wall in the background
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Промышленные и самодельные "партизанские" антенны для городского/сельского препп