Re: [Paddlewise] paddling at night

I tested my converted LED beacon up to 1/2 mile and I could probably get
more! It's good for a week on 4 AAs.



cya
-----Original Message-----
From: Joe Pylka <pylka_at_castle.net>
To: Chuck Holst <CHUCK_at_multitech.com>; 'Paddlewise'
<paddlewise_at_lists.intelenet.net>
Date: Wednesday, March 03, 1999 2:28 PM
Subject: Re: [Paddlewise] paddling at night


>>>While searching the Web for information about night vision, I ran
>>across several sites offering LED flashlights for sale. Seems to me
>>that LED lights could be used for a couple of purposes: making
>>yourself visible to your companions and for illuminating your compass.
>>For the first use, a low-intensity LED that could be attached to your
>>PFD would be ideal. It should be fairly easy to make one from parts
>>bought from Radio Shack.
>
>    This might open up another can of worms.......   LEDs have a specified
>brightness that is also spec'd with an angle of viewproduced by having a
>small reflector behind the active chip.  Spread that energy over a wider
>angle and what's seen by an observer would be far less.  So as a small
>source for reading a compass or a map, they'll do fine.   As a marker or
>beacon, though, they may be found wanting.
>    I have used a hikers or bikers LED Patch for night paddling.  These are
>composed of many LEDs with some circuitry to produce an attention getting
>flashing pattern, or else to pulse the LEDs at a high frequency and higher
>current to get more apparent light out of them.  It's cheaper, probably, to
>buy rather than build.  I bought a small one up in Maine for about $7.
>
>
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