Sparkfun support will be closed from 3:00PM to 4:15PM on April 27th for a company-wide townhall meeting. We will resume regular hours on the 28th.



Member Since: November 6, 2010

Country: United States


Programming Languages

Python, C++, Javascript, Java, Forth



  • Kamiquasi, thank you. That is what I wanted to know.

  • RobertC, the Cycling RGB LED has three different LEDs in one package. The different LEDs have different forward voltages, according to the datasheet. So which one do I use to calculate what resistor to attach to this LED, the lowest value?

  • newbie question: when calculating the current limiting resistor, what value do I use for the forward voltage? The red LED has Vf typical 2.0 and max 2.25, but the green and blue LED have Vf typical 3.5 and max 5.0.

No public wish lists :(