So why use a binary clock on your desktop? The most common reason is because it
looks cool, and you will be able to learn binary code. Have your friends over and
dazzle them with your abilities to read the binary number system. It's also a great
way to learn binary and/or BCD!.
What's the difference between binary and BCD?
BCD stands for binary coded decimal, and it can be though of as a special easier-to-read
version of binary. For example, say the current time is 8:59. You could encode the
"59" minutes as binary, which would be 59 = 00111011. Or, you could use BCD and
encode each digit seperately, 5 = 0101 and 9 = 1001. By encoding the digits seperately,
they are easier to interpret