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 #104919

Member Since: January 6, 2010

Country: United States

  • I understand that the 3 to 8 decoder and the extra pin from the microcontroller selects 1 of the 9 rows of LEDs but how does it know which of the 3 LEDs in that row to select? I apologize for the trivial question but my friends and I have been analyzing this for some time and we’re still scratching our heads @_@.

No public wish lists :(