My friend Matthieu Godbout, accomplished photograph/hacker/artist, has been taking some awesome pictures of my LED button pin in action. The extended exposure and the use of reflective surfaces make for some very intersting pictures.
You can actually see how the PWM behaves very clearly. Looking at the pictures reminded me that all patterns are under 50% brightness or so, which I limited to save battery. This explains why there aren't any continuous beams of light. The decomposition of individual pulses shows the 7 possible colors combinations (R-G-B-RG-RB-GB-RGB).
The ones that look like jellyfish-butterflies are produced by the LED pin surrounded by a reflecting carton cylinder taken from a pack of cigarettes.
Matthieu Godbout January 11, 2011 at 6:48 AM