I was looking around at some of the projects people have done with their Raspberry Pi computers, and I must admit I'm pretty impressed with a lot of them. Then I came across one I've seen before: a binary clock. A binary clock usually has a set of LEDs that indicate a number in binary, so for example, 25 seconds would be displayed as 11001.

This is all well and good, and a bit (a lot) nerdy, but there are very few people in this world that can read hours, minutes and seconds off such a clock without working out what each of those digits represents. Another base would be better than base 2.