The counter will count from 0 to 255 in the decimal number system. It will also show 0 to FF in the HEX base 16 number system, and 0000 0000 to 1111 1111 in the binary number system. For example 064 in decimal is 40 in HEX, and 0100 0000 in binary. The Red LEDs represent binary 1 and green LEDs represent a binary 0. The display on the left is Decimal and the display on the right is HEX.
