In this video I build a very simple loudspeaker from paper, cardboard and copper wire. \r I talk about how the speaker works, and test it in the end.\r ¤¤¤¤ -- SUPPORT Ec-Projects -- ¤¤¤¤\r \r By using my Amazon affiliate links (No extra cost for you!)\r Amazon US - \r Amazon UK - \r Amazon DE - \r \r By becoming a Patreon for as little as $1 per month \r Patreon - \r \r ¤¤¤¤ ----------------------------------------- ¤¤¤¤
