(National Aviation University, 2021-04-28) Svystun, Serhii; Свистун, Сергій Сергійович
In the era of modern technologies, people can’t live without electronic devices, even a few days. At the moment, phones are commonplace, something we are used to. Every morning we get up and look at the charging rate of our smartphone. So let's analyze the simplest secondary power source - a phone charger.
