Thanks to all of you. I did all of the above. The worst part was the unsoldering. I believe they (assemblers) bent the leads on the LEDs, so I spent a lot of time (and heat) removing them--couldn't keep the leads hot enough with the heat sink on them. I guess I was lucky since once re-wired (using your polarity suggestions), everything worked.
Now for Stan (and anyone else following this thread). After all the trouble I went through with the IR module having a LO trigger, and then Stan showing me how to make that work to turn the relay on when detection occurs, guess what--now that doesn't work.
Just a little tutorial for anyone interested. When the emitter/detector are side-by-side looking for a reflected signal, you need to modify the wiring to the relay as Stan explained above. However, when the emitter is pointed at the detector all the time, a LO trigger is what is required. The reason being is that when the detector senses IR from the emitter (which is all the time except when the beam is broken), you want the IR module output to be LO (so the relay is not energized all the time). Then when the beam is broken, the IR module output goes HI, and activates the relay until the beam is re-established. I hope all this wasn't too obvious, but not to me. So back to the soldering iron to go back to original connections--now that the burns have healed.
Ken
