Dwight:

I have a lot to learn regarding posting schematics. Sorry for the confusion.

As far as adding the capacitors - I'm sure they are not needed, the signal from the LED's is very stable, no noise or "jitter". Since a high speed response was not required here, I thought "what the heck", I'll just add them anyway. I did not test the circuit without the capacitors, but it would probably work just fine without them.

The change in signal level from the LED's is very smooth, kind of neat to see how the value changes as the shadow moves across the LED.

Ken