1.0Camdemy1.0https://eclass.uch.edu.tw<div>Make your own battery using copper coins, vinegar, foil and cardboard. I had enough energy to power an LED with mine and also a TV remote! Really simple scie...</div>https://eclass.uch.edu.tw/user/0https://eclass.uch.edu.tw/sysdata/doc/2/2a47a8d5e16c6299/badf_l.jpg360640<iframe class="embedly-embed" src="//cdn.embedly.com/widgets/media.html?src=https%3A%2F%2Fwww.youtube.com%2Fembed%2FvIHfUJu3aKo%3Ffeature%3Doembed%26autohide%3D1&display_name=YouTube&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DvIHfUJu3aKo&image=https%3A%2F%2Fi.ytimg.com%2Fvi%2FvIHfUJu3aKo%2Fhqdefault.jpg&key=705fe00b29ca4031aeda8362645d2624&type=text%2Fhtml&schema=youtube" width="640" height="360" scrolling="no" title="YouTube embed" frameborder="0" allow="autoplay; fullscreen" allowfullscreen="true"></iframe>video64036004:09001embedyoutubehttps://eclass.uch.edu.tw/sysdata/doc/2/2a47a8d5e16c6299/badf.jpghttps://eclass.uch.edu.tw/sysdata/doc/2/2a47a8d5e16c6299/badf.jpghttps://eclass.uch.edu.tw/sysdata/doc/2/2a47a8d5e16c6299/video/thumbs/storyboard.jpghttps://www.youtube.com/watch?v=vIHfUJu3aKohttps://eclass.uch.edu.tw/sysdata/doc/2/2a47a8d5e16c62991