Learn how to make a simple lemon battery and use it as an emergency phone charger in this hands-on science experiment. Watch ...

Welcome to my channel Mr Sagoo where you will learn how to make an idea with your own hands. Waiting for your support! Other ...

The following automatic battery-charger design is created with a circuit that could qualify as the simplest window comparator ever built around a single transistor (see the figure). It starts charging ...