Hi Wayne,
        How would I obtain this information ? Manufacturer or trial and
error ?
As far as time goes, the counters would only be underwater for 12 to
18 hours at
the most. But a concern would be that the display stopped working
while down below.
If a return trip had to be made because the display was out it could
get very costly in a hurry
at multiple thousands of dollars per hour.
        I just returned from looking at your web page.. I would sure like to
pick your brain about
the next project. A 2 axis inclinometer that will send RS232 up to
the surface. I was thinking of
using the PIC 12C671 with it's built in A/D converters and 2 pins
left for RS232.
        Thanks for taking the time to reply to my post.
        James Holbrook

On Saturday, February 28, 1998 8:21 AM, Wayne Foletta
[SMTP:foletta@IX.NETCOM.COM] wrote:
> Be sure to check the "half-life" spec of the LEDs versus forward
> current for the LEDs you are using. With some brands of LEDs the
> light output falls off very quickly at higher currents (over 20%
per
> decade of time at 2X rated maximum If).
>
> Wayne Foletta
> Data Acquisition Engineering
> SiliconSoft, Inc.
> http://www.siliconsoft.com