Here is how to build and Infrared Sensor using the QRD1114 

Step 1: Parts Needed

One of : QRD1114  Light Sensor

One of : 220 Ohm Resistor

One of : 10 K Ohm Resistor

One of : 3 Wire Cable
<p>brother, can I use TCRT5000 IR phototransistor instead of QRD11114 <br>Please help</p>
<p>Hi</p><p>I want to turn on and turn off my LED table study lamp by moving my hand over a sensor. Hand over tuns on and hand over again to turn off. Do I need a infrared sensor and a flip flap? </p><p>What do you suggest? A simple one and as small as possible!!</p>
<p>I am really sorry i missed your comment.<br>I dont have experince with IR sensor and Flip Flop circuit to be able to advise you on it.<br>Easiest thing that i can suggest would be to use an Ultrasonic sensor to detect if you hand is there or not and it works in the dark.</p>

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