Re: [ATM] LEDs What do they offer:

["David Harbour" <scarab2@cox.net>]

Dale-

You are right- I am living in the past. Thank you for edifying me about
this. I will probably never make another mirror. To quote a wise man: "There
is a time and a place for everything". But I am sure you are RIGHT! Thanks
for straightening out an old guy!!!

Dave


----- Original Message ----- 
From: "Dale Eason" <atmpob@yahoo.com>
To: "ATM List" <atm@atmlist.net>
Sent: Saturday, June 18, 2005 6:10 PM
Subject: Re: [ATM] LEDs What do they offer:


> Dave,
> You obviously have not tried any of the newer high
> brightness LED'S.  They are so bright they make good
> flash lights. They hurt you eye to look directly at
> them.
>
>  Incandescent output more heat than they do light for
> a given input.  LEDs are smaller use less energy (I
> drive mine from 2 AA batteries at about 10ma) and
> produce no heat that I have to get rid of.  Lastly
> they come in may colors.  I like to use green since
> that is where the eye is the most sensitive and where
> the mirror figure will be used for visual.
>
> Incandescent works well  but the right LED is a lot
> easier to use for new construction with much less
> fuss.  Many of the modern variety already have the
> limiting resistor built into them so you don't even
> need to figure it out.
>
> Don't worry about the energy wasted by the resistor.
> It is so small you can easily run the LED from a
> couple of C cells for months of Foucault use.
>
> They also make good key chain red LED flash lights
> that are perfect for observing use at night.  Cost $2
> at Walgreen's drug and run on tiny quater size
> batteries. I take the green ones apart to make
> Foucault testers.
>
>
> Dale Eason
>
>
>
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