ON 20030914@3:49:49 PM at page: http://www.piclist.comio/led/pulse.htm JMN-EFP-786 James Newton Published and replied to post 37876.036875 |Insert 'I'm not aware that they do change color. If you are talking about Bi color or Tri color LED, the change in color is due to "mixing" of different amounts of the two or three different colors actually produced by the LED.' at: '' How do pulse LEDs appearn to change color? |Delete 'P-' before: '' but after: '