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SparkFun will be closing early at 3:30 Friday 5/27 and remain closed Monday for Memorial Day (5/30). Orders placed after 2pm MT on Friday (5/27) will process and ship out on Tuesday (5/31).

Member #374670

Member Since: October 30, 2012

Country: United States

  • Thanks. I’ll use 18 and see how it goes

  • The info sheet doesn’t have Amperage numbers. I’m not sure how to build bigger circuits and get the correct resistors without it.

    For example, I found an equation to use that goes like this… For a 20mA LED, then the required resistor value would be R = (Vbat - Vled)/20ma.

    Obviously I don’t want to overstress my LED and turn it into trash.

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