Re: ATM Brightness of LED

[Jonathan Bishop <jonathan_bishop@sbcglobal.net>]

My experience exactly! I replaced the batteries and
the led was much brighter. But then I replaced the led
with a bulb from a small maglight and the brightness
was greatly increased.

You can buy the bulbs at a hardware store. They also
use two AA or AAA batteries. I took the time to frost
them using some emery paper.

Jon Bishop

--- Scott Berfield <sberfield@xbox.com> wrote:
> 
> I learned an important but small thing as I got to
> the end of figuring
> my mirror. I was having a ton of trouble reading the
> Foucault test and I
> couldn't figure out what was wrong. It wasn't until
> I tried taking a
> picture of the Ronchi test and saw how dark it came
> out that I realized
> what it was. Over the many weeks I have been doing
> this, the batteries
> in my tester had faded to the point where the LED
> was app.. 1/4 as
> bright as it had been. As a result, the contrast
> levels were so low I
> could barely read the thing unless the room was
> totally black. Duh. the
> decrease had been so gradual that I never noticed it
> (I just thought my
> already bad eyes were getting worse. I put in new
> batteries and all of a
> sudden the test was readable again.
>  
> Moral: If you are running into difficulties, don't
> rule out the obvious!
>  
> -sb
> 
>