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Strobe light
K4556 wrote:
On Mon, 19 Mar 2007 08:16:25 -0800, Gordon wrote: A lot of commercial fishing boats spend the night at sea drifting. To be seen better, they use a strobe light. Legal or not, they want to be seen. I/m thinking an all around white LED anchor light could be wired to a relaxation oscillator or 555 timer chip to create a low current draw white strobe. Yes? No? Gordon Certainly you could build a 555 powered on-off system to blink an anchor light on and off and you would have a blinking light. Of course a "Strobe" is a somewhat different beast as it is a flashing BRIGHT light and much more likely to be noticed at a distance. Ibid (k4556ATinetDOTcoDOTth) I suspect the objectives are to reduce power consumption (which, for an LED is likely to be small anyway) and to increase noticeability by blinking. Whether pulsing will increase the LED's apparent brightness (relative to the normal, unpulsed anchor light) depends on how the anchor light was designed, and the type of white LED involved. Many white LEDs produce their maximum output at something like 20 mA so high-intensity pulsing may not increase output. If the anchor light uses something like the Osram Golden Dragon (2 watt) white LED, that would certainly be noticed if pulsed, say, once per second! Not as bright as a strobe, but a whole lot better than many anchor lights now in use. Actually, in fog or mist, yellow anchor lights might penetrate better (i.e., not be reflected by water droplets) than white ones with a lot of blue in their spectral output. Like fog lights on cars. Chuck ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
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