How to make a gravity light/gravity generator that powers an LED using the force of gravity with two falling masses turning a generator? Watch this instructional video from rimstar.org and learn how you can make a low cost gravity generator producing electricity for lighting using material which are usually at …

Although today’s smartphones come equipped with  large touch screens, Bluetooth, build in GPS receivers, multiple connectivity options and all other useful capabilities they are very energy consuming devices and have pretty disappointing battery life. This could be a big problem while traveling in remote countries with scarce infrastructure or in …