IR Motion Detector Proximity Sensor Experiment 1

While doing my research, I came across many versions of this circuit online and figured it would be pretty simple. After all the parts count is low and it can be assembled on a breadboard. As it turns out however, it is quite tricky to get this circuit working as intended. I plan to add an oscillator and demodulator to improve the performance and range. Here are some tips for trouble shooting the circuit:
1) Familiarize yourself with IR LEDs and Receivers. There are several different types. In my build I used the standard hobbyist clear IR LEDs and the black colored 2 pin IR photo diode receiver (it looks like a black LED).
2) Test you IR components. You can put them in series with a regular visible light LED, use a multi meter, use a working remote control, or view them through a camera, to see if they are functioning.
3) Observe the polarity of the components. Note that the IR Receiver is reverse biased. Also note the regular indicator LED is biased in the "Normally OFF" configuration. If you want "Normally ON" flip this LED and connect its (-) terminal to ground.
4) The IR receiver is very sensitive to florescent lamps. Test your circuit in a dimly lit space to see if its working properly. Afterwards, try it in a bright location. If the indicator stays all the time on you'll need to adjust the 15K resistor. I also place a shield between the receiver and emitters to prevent false triggers.
5) You can use any value resistors in place of the 10k /10k voltage divider or use a potentiometer. This simply sets the reference voltage for the op amp. I used fixed resistors as there was no need to adjust the reference voltage.