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김충원 ( Choongwon Kim ) 조선대학교 공학기술연구원 2015 공학기술논문지 Vol.8 No.3
In this paper a simple method for power generation from plasma globe is proposed and discussed. Experiments show that the proposed power pick-up method is not on electromagnetic induction but on electrification by a longitudinal wave, that is electrostatic induction. The globe is regarded as a transmitter and several kinds of material could be used as a receiver. Lots of LED could be lit by using a small power transformer between the receiver and ground. A condenser could be charged by Averamenko plug. Particularly some peculiar phenomena have been observed. Yet the causes are not explained.
박성호 ( Sung-ho Park ),김충원 ( Choongwon Kim ) 조선대학교 공학기술연구원 2016 공학기술논문지 Vol.9 No.4
In this paper, a simple and robust low-power LED driver using a series RLC resonant circuit is proposed and discussed. The characteristic of the series RLC resonant circuit is that the voltages across the capacitor and the inductor are Q factor times the input voltage. Thus, it will be possible to drive the LED arrays in the series RLC resonant circuit which having a sufficient Q. MATLAB simulations and the experimental results showed that the proposed LED driver is very efficient and robust for driving LEDs with a very low input voltage less than 1.5 Vrms.