Like most geeks, I have an LED based binary clock on my desk. But, hey, humans are analog creatures so please enjoy my analog binary clock. Based on Achim's clock3 which is great!

Print all 3 pieces and insert a cheap clock mechanism from the nearest store (mine came from Hobby Lobby, but I have got them from Wal Mart). A few dots of hot glue or CA glue will attach the center to the ring. The ring will just rest on the stand.

I tried painting the face white and using a red Sharpie on the numbers with mixed results.