NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: led lights
From: Ken James
Date: 2003 Nov 26, 20:22 -0600
From: Ken James
Date: 2003 Nov 26, 20:22 -0600
> Interesting. You are flashing the light on for 1/10 of a second, then off for 1/10th of a second. No, that is optimum. I use a different duty cycle as a comprmise, so I do lose some effectivness. But the human eye sees flicker (in computer monitors, florescent lights, cinema) even at a rate of 60 pulses per second. i.e. some people can readily see a monitor flickering when it refreshes 60x per second. Actually it depends on whether it is dark or light surroundings, the color and intensty of the pulsng sourece, and other things...50HZ is a good ballbark fusion rate for this application. Even then there is a slight noticable 'buzz' at times...you can even tell the battery voltage level by flickng your eyes past the anchor light and seeing the duty cycle! But from a longer distance it is not ever really noticable.-Ken
