x2Jiggy wrote a post on his blog detailing the build of his DIY binary clock:
This clock uses a minimalist design constructed in the shell of an old hard drive. A DS1307 Real Time Clock (RTC) module keeps accurate time while an ATMega328 (with Arduino bootloader) microcontroller determines which LEDs should be lit to display the current time in binary.
Ever since receiving my binary watch a while back, I’ve wanted to make a desk clock version. As this is my first crack at one, I thought I’d keep things basic and make it simply tell the time. No alarms or other fruit.