Thanks!
Somehow I have overlooked the obvious. If My eyes were better, I may have
caught that myself, but I doubt it. And for the other posts, what it is
supposed to do, is light up the green/clear LED with the brightness
controlled by that blue variable resistor at the top left of the circuit.
Believe me, when it lights, it is bright green. I hate being this slow, but
my excuse is that three years ago, I had the s*it beat out of me, topped off
by being shot. I'm alive, just not very bright anymore.
Many thanks to all who responded, if I have more problems, I'll post it in
an electronics forum.
Thanks Again; Don

wrote in message
oups.com...
Don,
A quick look shows that your schematic calls for a LM324 but your
breadboard is showing a LM339 wired as a LM324. Nice try. Not the same
pinout on the chips.
If you use a 339 you need to look up the pinout and make changes to
your wiring diagram accordingly.
Try National Semiconductors Website.
Clark Hinds
Cetacea Sound, Inc.