Instructables
Picture of RGB LED Motion Sensor Lamp

Materials & Tools Needed:
Arduino Uno
PIR Motion Sensor
1, LED
1, 220 ohm resistor
Jumper Cables 
Breadboard
Heat Shrink
SN75468N 16 pin IC chip
3, MOSFET N-channel transistors (I ordered mine from Adafruit)
5v DC Relay (I bought mine from Radioshack)
Perfboard
RGB LED Analog Flex Strip (I ordered mine from Adafruit)
Solderless Analog RGB LED Strip Clip Sampler (I ordered mine from Adafruit)
Alligator Clamps
Xacto knife
3, 24x3 inch shipping tubes
Strip of Aluminum Sheet Metal
Plywood
Sharpie
Wire Ties
Pop Rivet Tool
Pop Rivets, the appropriate amount to hold your lamp design together
Clamps (Not completely necessary but it makes using the pop rivet tool so much easier!)
Drill 
Skill Saw
Yardstick
Small Screwdriver
1032 Tap
Chanferring Tool
Sandpaper
Extra 22 guage wire for connecting all the pieces together
Soldering gun & solder
Battery pack and batteries (for plugging into arduino and testing before soldering)

I figured after buying all the various components this lamp cost me about $60.
 
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Step 1: Testing your PIR Motion Sensor

Picture of Testing your PIR Motion Sensor
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First thing that needs to be done is to test the PIR Motion sensor. I followed this instructable, which is the basic schematic I followed that is shown here. I do warn though, the PIR sensors from Radioshack are not set up exactly as the one in the shematic shown so I had to do some shuffiling around with my wires and LED/resistor placement, but overall it was relatively simple to test it and get it working.