Instructables
Picture of Building an Infrared Sensor
Here is how to build and Infrared Sensor using the QRD1114 
 
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Step 1: Parts Needed


One of : QRD1114  Light Sensor
http://www.hvwtech.com/products_view.asp?ProductID=97

One of : 220 Ohm Resistor

One of : 10 K Ohm Resistor

One of : 3 Wire Cable

Step 2: How it works

Picture of How it works

Step 3: Building the Infrared Sensor

Picture of Building the Infrared Sensor

Step 4:

Picture of
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ManiA221 days ago

Hi

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?

What do you suggest? A simple one and as small as possible!!