Device’s photodiodes capture images and also charge the power supply.
Light is energy. Cameras need energy to work. A modern camera works by sensing light. This cycle has provided an elegant solution to one of our digital age’s universal problems: how to power a camera infinitely. Digital cameras create images based on data from millions of photodiodes, each of which measures the amount of light it receives. But solar panels use photodiodes, too, converting light energy into electrical energy.
[Source:- Discovermagazine]
