Member #642737

Member Since: January 25, 2015

Country: United States

  • All 4 digits when on at the same time are a bit dim when driving with just the Arduino Uno.

  • Thank you for this information. I am also reading the John Boxall book. I wasn't paying attention that he was using common cathode and that these are common anode.

    Also,

    The "B" indicates that the number is binary, so "B00000011" = 3 in decimal
    0 -- B00000011 = 3 = 255 - 152   [152 is what you would need for common-cathode]
    1 -- B10011111 = 159 = 255 - 96  [96 is what you would need for common-cathode]
    2 -- B00100101 = 255 - 218 - 37   [37 is what you would need for commond-cathode]
    etc.
    

    Because of the common anode design of the 7-segment, you need to pull the pin low (set to 0) to light up a segment.

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