Binary Clock ( Trivia # 8 )

Catch out this amazing variety of clock ....


As of 2008, the most common binary clocks sold are designed by Anelace Inc., and uses six columns of LEDs to represent zeros and ones. Each column represents a single decimal digit, a format known as binary-coded decimal (BCD). The bottom row in each column represents 1 (or 20), with each row above representing higher powers of two, up to 2^3 (or 8). To read each individual digit in the time, the user adds the values that each illuminated LED represents, then reads these from left to right. The first two columns represent the hour, the next two represent the minute and the last two represent the second. Since zero digits are not illuminated, this clock is not usable in the dark.

To read a BCD clock add the values of each column of LEDs to get six decimal digits. This gives two decimal digits each for hours, minutes, and seconds.