Theoretical investigation and improvements in contemporary man-powered electronic lighting system

Abstract

With the growing emphasis on energy conservation and environmental protection, the Faraday flashlight, which converts mechanical energy into electrical energy through the principle of electromagnetic induction, has garnered significant attention in recent years for its application in emergency lighting in power-free environments. This article investigates the theoretical working principle of an existing model of a Faraday flashlight. The foundation lies in Faraday’s and Lenz’s law of induction, which is explained briefly using established theorems. A typical shake-type Faraday flashlight’s circuitry is used for simplicity in theoretical analysis. A detailed process of the conversion of energy is provided and explained. Comparisons are made between two ways of using the flashlight: its switch is either closed or open. For each way, a method that uses resonant frequency for better efficiency is proposed and justified theoretically. Based on existing works, summarizations of some applications of the Faraday flashlight are made. Generalized and extensive applications of the flashlight’s power system are introduced. Overall challenges of the Faraday flashlight are explained, concerning Faraday flashlight's practicality and usefulness. General improvements to the system and its usefulness are proposed and explained.