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Member #634699

Member Since: January 3, 2015

Country: United States

  • These are very nice. They are common cathode devices. With the diffused case and depending on which colors (RGB) are turned on, one can get eight different colors. For good color balance the current limiting resistors need to be different. For a 5 volt supply, I found using a 330 ohm for red, 510 ohm for green and 270 ohm for blue gave reasonable colors for cyan, magenta, and white. The eighth color is black with all leds off. They can be used to show how the properties of color addition.

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