Automatic Hand-Wash Timer

According to the World Health Organization (WHO) guidelines, people need to wash their hands with soap and water at least for 20 seconds to get rid of any virus. Although you have a stopwatch on phones, wristwatches, and other electronic devices, it is not convenient to use them. Also, some people do not want to…

Solar Day Lamp With Battery Backup

This solar day lamp with battery backup can be used in offices, homes, shops, warehouses, temples, etc. It offers a cost-effective way of harnessing solar energy. It is simple to manufacture and has a long life. The basic solar day lamp (SDL) consists of only two parts: photovoltaic (PV) panels and LED arrays. Due to…

Watch a tiny robot back flip through a real colon

A rectangular robot as tiny as a few human hairs can travel throughout a colon to deliver drugs by doing back flips, researchers report. Why the back flips? Because the goal is to use these robots to transport drugs in humans, whose colons and other organs have rough terrain. Side flips work, too. The robot…