This movie demonstrates how the tricopter hovers autonomously inside a room. There are three LEDs fixed to the copter which are filmed by a webcam from below. A Matlab script then makes the copter hover in place.


  1. Brilliant! May I ask, what kind of IR-LEDs you are using? It looks like you're screening the webcam against normal light with a photographic film. Is it that simple or have treated the film in some way?

  2. Hi!
    Yes it is that simple. The photografic film (negative) is only translucent for infrared light. The IR diodes I am using now (different from the ones in this video) have 100mA and I use always groups of 5 LEDs (20 in total). That gives a lot of light.


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