DIY SolarA DIY hand-cranked emergency power bank is a portable device that can be charged by turning a hand crank. It can then be used to charge electronic devices, such as phones or flashlights, in the event of a power outage or other emergency situation. To make your own, you will need a few basic materials, including a hand crank generator, a battery, and a charging circuit. You will also need to have some basic knowledge of electronics and soldering.
Credit Weekend DIY Projects