Ebay LED disco lamp teardown.

A rather neat (albeit quite annoying) LED lamp purchased from ebay, that has three 1W LEDs (red, green and blue) mounted behind a rotating lens on the front that projects a HUGE number of moving dots of light onto the surrounding surfaces. This is pretty neat actually.
It's very simple. A switchmode LED driver and the motor is just tagged across the DC to the LEDs.
Don't do what I did and try and turn the lens by hand, since it's got plastic gears that can skip and get damaged easily.
It's also worth noting that it turns quite fast. I tried tapping it over different LEDs with the 2V across the red LED making it run slowest, but it made it very "jumpy" due to the crappy plastic gearing.